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02D01980-1500 02 Dec 2006 - 23:22 - r1.4 Home.enigma06
Editor's note: the small list does not appear to have the required parts for the IABs Author: eg6ajk Date: 05-24-03 15:10 my parts list seems to be alot smaller: ...  
1WireVtec 20 Feb 2004 - 00:37 - NEW Home.blundar
The 1-wire vtec codebase is a ROM for the OBD0MPFI ECU s that allows the AutomaticTransmissionLockupSolenoid to be used to control vtec engagement. JasonParker came ...  
29C010 18 Nov 2006 - 17:46 - NEW Home.longbow
The http://www.atmel.com ATMEL AT29C010 chip is a FLASH ROM chip with 1Mbit(~128kb) of memory. It can be found in old Pentium I II computer motherbords. This chip ...  
5050s 27 Jan 2007 - 14:25 - NEW Home.b16a2
Use this method if you install a 5050s in IC14 and you get a MIL code 21. STEP 1 modify and install the VTEC parts as normal but stop at the installation of IC14 ...  
6260ATesting 19 Feb 2004 - 22:01 - NEW TWiki Guest
J. Wong: about the 6260A thing... if you take a look at the code ( 91PM6 ECU LED CEL ) that flashes the ECU LED for codes you'll see that it writes #16 or #96 to X2000 ...  
82C55 01 Aug 2005 - 14:37 - r1.3 Home.blundar
The 82C55 is an IO controller chip used in many OBD1 ECUs. Fortunately, almost all OBD1CivicIntegraECUs share a common pattern for what is controlled by the 82C55 ...  
91PM6 19 Feb 2004 - 23:25 - NEW Home.blundar
Describe 91PM6 here. 91PM6TargetIdle describes how to set the target idle in a PM6. Similar to 91PM7TargetIdle 91PM6 ECU LED CEL describes the blinking of the LED ...  
ADC 19 Feb 2004 - 22:01 - NEW TWiki Guest
Analog to Digital Converter: An integrated circuit (IC) which converts an analog signal to a digital representation. As an example let's consider an 8-bit ADC with ...  
AccordAutoOBD2-OBD1 13 Oct 2005 - 22:25 - r1.4 Home.drdisco69
Information provided by Bird333 First off my disclaimer (gotta have one right ). I, nor anyone else is responsible (except you) if you screw up your car, house, life ...  
AcuraIntegraPR4ECUPinoutAndSchematics 25 May 2005 - 04:33 - NEW Home.markolson
I found an old manual that had Engine Control System schematics for the '90 and '91 Integra, which is the OBD0 PR4 ECU. Unfortunately, it didn't have pinouts for the ...  
AddAKnockSensor 24 Jun 2005 - 03:02 - r1.2 Home.street_kings
To add a Knock Sensor to a P75 here is what I did: 1. Remove a knock board from a JDM p30 2. Move the connector strip from prot "A" to port "B" 3. Remove R12 4. Add ...  
AddBoost 19 Feb 2004 - 22:01 - NEW TWiki Guest
crome scripts work on p06, p28, p30 (edm, jdm, usdm), p72; it recognizes the rom as do most other Rom editors. Not all scripts work on all ROMs. Boost is a notable ...  
AddIABToP28 29 Jul 2006 - 05:20 - r1.9 Home.M2Prelude
Author: Deluded Date: 07-24-03 23:44 READ CAREFULLY: The procedure to add IABs is different depending on how they are wired. One IAB wire will always run to the ECU ...  
AddKnockToP30G00 26 Jan 2006 - 05:05 - NEW Home.synoptic
On 1720 or 11f0 I've: remove R140, R141 10k add R107, R115, R116 220R I also add (they may not be essential): C94 4u7 16v tant Q20 a143 On 1550-150x: remove R78 ...  
AdjustPR4PaSensor 22 Sep 2005 - 21:14 - r1.2 Home.warrick
Dave Blundell sez "Vernon (deluded) sent me much of this info." As a rule of thumb, 90 PR4s have external PA sensors, and 91 ECUs have internal PA sensors. You can ...  
AutoOrManual 19 Feb 2004 - 23:25 - NEW Home.blundar
A hardware/software interaction will determine whether a program in an ECU behaves as a manual or auto. Hardware configuration of RP17/RP18 determines whether the ...  
AutoToManual 09 Jan 2007 - 08:17 - r1.4 Home.defensio
Most automatic ECUs can be converted to a 5spd rather easily. Going the other way often involves adding more components. At this time, it appears that the conversion ...  
AutomaticTransmissionLockupSolenoid 19 Feb 2004 - 22:01 - NEW TWiki Guest
the Automatic Transmission Lockup Solenoid is a solenoid present in automatic cars transmissions that causes the torque converter to lock under control of the ECU ...  
BasicConcepts 19 Jan 2006 - 07:34 - r1.3 Home.markolson
Vocab: ECU Engine Control Unit OBD0 the first unofficial generation of honda engine electronics OBD1 the second unofficial generation of honda engine electronics ...  
BegginersFAQ 27 Feb 2007 - 18:13 - r1.2 Home.sanimalp
(blundar sez: most of these were moved over from the old FAQ) If you are a beginner, and you have a question that you think other people will have too, please add ...  
CEL 22 Dec 2005 - 08:58 - r1.3 Home.qwertyville
Check Engine Light This indicator (usually on the dash) comes on to indicate that the ECU thinks something is wrong. The ECU will usually indicate an error code by ...  
ChippingAn88-89ECU 21 Sep 2005 - 08:24 - r1.8 Home.1net
OBD0MPFI ECUs have two main designs that affect how the ECU is chipped. 90-91 ECU s have an external 38256 (same as 27C256 ) ROM . This can be removed and replaced ...  
ChippingJDMP30 12 Jan 2007 - 03:32 - r1.5 Home.coupe-r
You will need bridge J1 on the back of the ECU. Add C49 C50 and C92 on back. C91 is on the front by the latch C49 C50 .004UF (Digikey part number 399-1230-1-nd ) ...  
ChippingOBD0PM6 05 Nov 2006 - 15:41 - r1.2 Home.synoptic
OBD0 ECU Chipping If you have a OBD0 ECU, chipping the ECU might not be straightforward. Almost ALL 90-91 PM6, PM7, PR4 and PP5(with catalytic converter) ECUs had ...  
ChippingOBD1SmallCase 11 Mar 2005 - 19:55 - NEW Lego Z81
For a write up go to ChippingJDMP30 Thanks 2 katman and infotechplus for the pics.  
ChippingOBD2 31 Mar 2004 - 19:00 - NEW Home.blundar
How to chip a ODB2 ECU by Doc (edited by Dave) Table of Contents: TOC Introduction Contrary to popular belief, it is possible to chip a ODB2 ECU. It's not cheap like ...  
ChippingWithPictures 19 Jul 2006 - 23:16 - r1.3 Home.4g vtec
Chipping OBD0 PM6 Pictures of what needs to be done to chip a 90-91 PM6/PM7/PR5/PR4/PP5/etc. ChippingOBD1BigCase Pictures of what needs to be done to chip an OBD1 ...  
ChipsForECUs 29 Mar 2004 - 21:20 - r1.2 Home.blundar
all 90-95 (most OBD0 and all OBD1 ) honda ECUs require a 32k byte (256kbit) ROM . Some common chips used by the DIY-chipping scene are the 27C256 , AT 29C256 and 27SF256 ...  
CommonTEProblems 27 Jan 2007 - 00:41 - r1.5 Jared Karagen?
The following are some problems that I see people running into fairly often when using TurboEdit. If I've forgotten any, please add both the problem and the solution ...  
Conversion 19 Feb 2004 - 22:01 - NEW TWiki Guest
Describe Conversion here. Conversion is the act of modifying the WireHarness at the ECU so you can fit ohter Generation (OBD) ECU. For example, you might want to run ...  
CromeFAQ 04 Aug 2005 - 02:22 - r1.4 Home.m2prelude
Why is Crome password protected? Crome is FREE software that without the hard work of many people wouldn't even be here. To give credit to its contributors, I (John ...  
CruiseControlSwitch 19 Feb 2004 - 22:01 - NEW TWiki Guest
Author: tungsten2k (12-240-101-225.client.attbi.com) Date: 09-19-03 01:36 fyi, for you EF people out there lookin' to do your FTS clutch switch the easy way, you've ...  
CylinderPositionSensor 30 Mar 2006 - 12:44 - NEW Home.edurmus
in SHOC engine cyp sensor is in distributor, DHOC engine seperated at exhoust camshaft on 1991 crx model cyp 1 sensor located at the front of distributor, it s a two ...  
D16Z6-4G-swapnotes 19 Feb 2004 - 23:25 - NEW Home.blundar
Brief remarks on installing the D16Z6 itself Installing a Z6 is pretty close to dropping a D16A6 (a.k.a. A6) engine in. Alterations that need to be made include: ...  
DLCCommunication 29 May 2006 - 14:12 - r1.6 Home.hondainfo
DLC Communication UNDER CONSTRUCTION BY HONDAINFO 1. Physical Layer (Theoretical informations based on ISO 9141 CARB Road Vehicles Diagnostic Systems standard) Signal ...  
DataLogging 24 Oct 2005 - 06:02 - r1.14 Home.markolson
Data logging refers to recording the conditions of a running engine. It normally happens using serial communication with the ECU There are two way for Data Logging ...  
DebuggingDataLogging 03 Jan 2005 - 05:58 - r1.4 Home.markolson
Thanks to ltdannear for lots of help in getting this to work. The following is a guideline for how to debug the datalogging circuit you have added to your ECU. This ...  
DifferenceUsCanPM6 03 Mar 2004 - 03:19 - r1.2 Home.tatou100
Here's the difference beetween US and Canadian PM6 First you have to know that US Civic/CRX have a external ElectricalLoadDetector or ELD. It's located in the fuse ...  
DocECUSchool 05 Mar 2004 - 17:40 - NEW Home.blundar
From post: Doc Teaches ECU School A while ago, Doc and I had a conversation on IM that turned into a very informative post. It is now archived here for your reading ...  
DualRoms 03 Oct 2005 - 14:07 - NEW Home.1net
Honda RomMaps are 256 kilobits (32kbytes) Use a 2xC512 (512kbit/64kbyte) EPROM Make one rom image with two full RomMaps one beginning at offset 00h one beginning at ...  
DualTables 19 Feb 2004 - 22:01 - NEW TWiki Guest
Dual tables simply refers to there being two sets of fuel/timing information in a single ROM. Vtec is an example of this there is one set of tuning information for ...  
ECU 24 Mar 2005 - 23:22 - NEW Home.Badboypolar
Engine Control Unit a computer that controls a car engine. Below are some basic questions about ECU's answered. How do I tell if my ECU is manual or auto? http:/ ...  
ECUBoostController 19 Feb 2004 - 22:01 - NEW TWiki Guest
The BoostController feature is a DEVELOPMENTAL feature where the ECU controls boost by sending a PWM signal to a bleed solenoid on the wastegate pressure line, just ...  
ECUControl 11 Apr 2005 - 22:50 - NEW Home.drdisco69
see http://www.ecucontrol.com or the http://forum.pgmfi.org/viewforum.php?f 10 ECU Control forum for more information.  
ECUHardware 06 Feb 2007 - 01:40 - r1.4 Jared Karagen?
This page describes how the hardware in an ECU works, and fun things you can do with it. If you are just wanting to learn how to chip your ECU , you should look at ...  
ECUHardwareMods 23 Feb 2006 - 07:38 - r1.12 Home.sonictronic
It is possible to do may modifications to the hardware of a Stock ECU. You can convert AutoToManual . You can convert OneWireTo4WireO2Sensor if starting with a P08 ...  
ECUNitrousControl 19 Feb 2004 - 22:01 - NEW TWiki Guest
ppl are working on a ROM where the ECU activates the nitrous solenoid instead of the usual WOT switch. The main advantage of this is that the ECU knows when nitrous ...  
EDM 27 May 2005 - 11:39 - NEW Home.hondainfo
European Domestic Market cars produced for Europe Compare to: JDM , USDM Note: EDM OBD1CivicIntegra ECU s generally lack the InjectorTestCircuit, KnockSensor, ElectricalLoadDetector ...  
EPROM 19 Feb 2004 - 22:01 - NEW TWiki Guest
Electrically Programmable ROM ROM that can be programmed using a RomBurner The most common types pin-compatible with most OBD0 and OBD1 Honda ECU s are the 27C256 ...  
EasyRtpInstall 30 Jul 2004 - 16:01 - r1.4 Lego Z81
Please Note: These installation instructions are preliminary. Please double check the instructions and report any errors. Once you've completed the construction of ...  
EasyRtpV10 22 Dec 2004 - 20:36 - r1.10 Home.synoptic
This page is a construction design for the Easy-RTP V1.0 board. This is the single sided design for a DS1230 style 28 pin DIP NVSRAM. You can find the eagle design ...  
EcuBackupProcessor 18 Nov 2004 - 17:30 - NEW Home.blundar
Honda ECUs are engineered with many levels of redundancy. There is a Backup processor (labeled NEC BACK0004 in most OBD0 and Oki 6534 in most OBD1 (??)). The backup ...  
EcuChippingWirelist 22 Nov 2005 - 23:59 - r1.4 Home.markolson
This topic is intended to help you debug soldering problems when chipping an ECU. The first section is generic advice for debuggiing all ECUs. The remaining sections ...  
EcuConnections 01 Nov 2006 - 18:43 - r1.4 Home.almskidd
You can donate any ECU WireHarness setup here. Write the ECU type, engine, cam, XDM and carmodel and make a link to a thread at Harnesses and Conversions in the Approaces ...  
EcuDefinitionCodes 02 Apr 2007 - 17:06 - r1.84 Home.hackish
Honda ECU definition codes These id codes are the last 3 digits printed directly on the MCU after the model number (e.g. M66207-251 the "251" portion will be a much ...  
EcuFamilies 29 Jan 2007 - 15:49 - r1.23 Home.1net
ECU Families: TOC "Pre-OBD" Early fuel injection designs PG7 : 86-87 USDM / JDM Integra (D16A1 VacuumAdvance) PE7 : 85-87 EDM / USDM Civic/CRX Si (EW3/EW4 VacuumAdvance ...  
EcuSensors 14 Apr 2006 - 13:08 - r1.4 Home.edurmus
Sensors present on almost all honda motors: CrankshaftPositionSensor Determines timing for fuel injection and ignition of each cylinder and also detects engine speed ...  
EcuTroubleCodes 23 May 2006 - 16:01 - r1.3 Home.Nuno Euro VTi?
http://www.hybridgarage.com/tech/codes.html Hybrid Garage's list of ECU trouble codes is pretty good too. There is a good list of the ECU trouble codes and other ...  
EcuTroubleshooting 14 Apr 2006 - 13:09 - r1.5 Home.edurmus
"my chipped ECU doesn't work! Help!" When you say "it doesn't work," what do you mean? There are a couple of common problems encountered when chipping ECUs: Sometimes ...  
EcuTuning 19 Feb 2005 - 21:45 - r1.2 Home.markolson
. Author: blundar Date: 08-12-03 14:12 EGT (or ExhaustGasTempSensor) and WideBandO2 used in combination with DataLogging can be a really powerful tool. Timing changes ...  
ElectronicAdvance 05 Mar 2004 - 18:23 - NEW Home.blundar
Electronic Advance refers to a motor setup where SparkAdvance can be controlled electronically by the ECU. Electronic Advance replaced VacuumAdvance because it is much ...  
ElectronicAdvanceDistributors 19 Feb 2004 - 22:01 - NEW TWiki Guest
Electronic Advance Distributors are distributors where the amount of SparkAdvance can be controlled electronically by the ECU .  
ElectronicPartSupplier 22 Jun 2004 - 02:15 - NEW Home.phiz
a handful of major electronic part suppliers: http://www.digikey.com Digikey good in-stock availability, great catalog, good website. http://www.arrow.com Arrow ...  
EngineCoolantTemperature 05 Mar 2004 - 19:46 - NEW Home.blundar
The EngineCoolantTemperature (ECT) sensor measures how warm (or cool) coolant passing through the motor is. Ed Gibson had this to say about it: 'Temperature lookup ...  
EngineSim 27 Jan 2007 - 14:57 - r1.4 Home.b16a2
The Engine Simulator is a device designed to simulate a running motor to aid in ECU development. Some links: (None of which work as of 1.7.2005, and certainly way ...  
FuelCut 19 Feb 2004 - 22:01 - NEW TWiki Guest
A Fuel Cut is when fuel to the motor is shut off completely. This is usually done as part of a RevLimiter, LaunchControl or BoostCut routine. FuelCut RevLimiter s ...  
FullDuplexDatalogging 24 Oct 2005 - 05:56 - NEW Home.markolson
Here is an explanation of half duplex vs full duplex serial port operation. It is really quite simple. With half duplex operation, only one side of the serial link ...  
GetRidOfCruiseControlUpshiftLight 23 Feb 2006 - 07:30 - NEW Home.sonictronic
All you need to do is remove R135. When I modify some P05 ecus I would sometimes get a solid Cruise control light when using an Ex cluster. Or a solid Upshift Light ...  
HardwareForOneWireVtec 23 Sep 2006 - 17:08 - r1.3 Home.tatou100
First, let me give credit to JasonParker for coming up with the parts list; I finally laid my hands on a PS9 to get the part values. To mod the PM6 (and likely similar ...  
HonData 19 Feb 2004 - 22:01 - NEW TWiki Guest
Hondata are the current (nov 03) commercial leaders in stock Honda ECU development and reprogramming. They certainly have excellent, tried, proven tools for tuning ...  
HondaErrorCodes 18 Nov 2004 - 21:11 - NEW Home.blundar
Ripped from http://www.hybridgarage.com Honda ECU Trouble Codes by various contributors 1 Accord Civic CRV CRX Del Sol Odyssey Prelude 85-98 86-98 97-98 85-91 93-97 ...  
HowDoesDataLoggingWork 24 Oct 2005 - 06:50 - NEW Home.markolson
There are a number of programs that enable you to log data about how your engine is working by reading information out of the ECU. For my OBD1 ECUs, I use CROME Pro ...  
HowToLogExternalDataSuchAsAnEgtSensor 07 Mar 2006 - 04:51 - r1.5 Home.markolson
Wouldn't it be nice to use your ECU to log data from and aftermarket sensor such as data from an EGT sensor? If you could, it would be relatively easy to use the O2 ...  
IdleAirControlValve 05 Mar 2004 - 20:08 - NEW Home.blundar
The Idle air control valve, or IACV regulates the car's idle based on the coolant temperature. Target idle settings vs. ECT: Note: this is ECU controlled and can be ...  
InjectorTestCircuit 22 Jun 2004 - 15:39 - NEW Home.blundar
The Injector Test Circuit is present in USDM ECUs to determine whether injectors are connected to the ECU. Responsible for a Code 16.  
IntroductionToECUChipping 12 May 2006 - 09:00 - r1.10 Home.hondainfo
Introduction to ECU Chipping by David Blundell Please feel free to link to this article, but "mirroring" is highly discouraged, as you will not automatically receive ...  
JDM 19 Feb 2004 - 22:01 - NEW TWiki Guest
Japanese Domestic Market cars produced for use in Japan Compare to: EDM , USDM Note: JDM OBD1CivicIntegra ECU s generally lack the ElectricalLoadDetector and PressureAtmosphere ...  
JapaneseDomesticMarketP30D12Modification 31 Mar 2007 - 03:41 - r1.3 Home.racingsky
Using the Unused Analog Input D12 on OBD1 ECUs to Log Analog Input Such as Exhaust Gas Temperature. All of the testing was done on a USDM P30 OBD1 ECU and all of ...  
KeheinIndianaPrecisionTechnology 06 Apr 2004 - 22:12 - NEW Home.alexburke
Keihin Indiana Precision Technology (IPT) appear to have designed the Honda ECUs. They have a http://www.ipt-inc.com/sp.html website . J. Wong: on a tangent, Indiana ...  
KnockBoard 12 Apr 2004 - 04:07 - NEW Home.tekphobia
the knock board is a circuit board (seperate from main ECU PCB) mounted in the top-right hand corner of DOHC Vtec ECU s having a KnockSensor. The KnockBoard is responsible ...  
KnockSensor 19 Feb 2004 - 22:01 - NEW TWiki Guest
KnockSensor s can be found on DOHC Vtec motors, such as the B16, B18C and H22. Also on SOHC Vtec OBD2 motors. A knock sensor is basically a special microphone that ...  
KurtsOBD0-OBD1 19 Feb 2004 - 22:01 - NEW TWiki Guest
First attempt to post this OBD1 conversion write-up on wiki.pgmfi.org. Some sections need revision still and they are in italics/bold print. Please send any suggestions ...  
LabelDecode 19 Sep 2004 - 19:21 - r1.3 Home.blundar
You can find out a lot from reading the label on a OBD1 ECU. This applies mainly to the Civic ECUs... dunno bount the integra ones. 37820-ABC-XYZ Digits Meaning ABC ...  
LimpMode 04 Mar 2004 - 00:45 - NEW Home.blundar
Aka "Limp Home Mode" LimpMode is the mode of operation when the ECU's CEL is lit solid red indicating a major malfunction. It is intended to get the car home, and ...  
MCU 30 Jul 2004 - 19:19 - NEW Lego Z81
MCU microcontroller A small CPU sometimes with RAM , ROM , EPROM , EEPROM , FLASH , or IO facilities onboard. Documentation on MCU's inside Honda ECU 's is http:/ ...  
ManualChecksum 19 Feb 2004 - 23:25 - NEW Home.blundar
There are two ways to fix a checksum error. The first is to change the program of the ROM in such a way that the checksum routine is disabled / removed. Learn to code ...  
MapSensor 13 Sep 2006 - 16:33 - r1.4 Turbo EF9?
The Manifold Absolute Pressure Sensor (MapSensor) tells the ECU what the absolute pressure in the intake manifold is (relative to AbsoluteVacuum). This allows the ...  
MassAirFlow 26 May 2004 - 17:42 - NEW Home.blundar
A Mass Air Flow engine managment system uses a mass-air-flow sensor (MafSensor) which is placed in the intake tract to directly measure the mass of air entering the ...  
NokiaCableDatalogging 15 Nov 2005 - 22:34 - r1.3 Home.nate
Jim Truett says: (original http://forum.pgmfi.org/viewtopic.php?t 1663) I have found a very good adapter to link the TTL output from an ECU to a Laptop or PC with ...  
O2HeaterCircuit 19 Feb 2004 - 22:01 - NEW TWiki Guest
the O2 heater circuit is what makes 4-wire OxygenSensor s different from 1-wire sensors. The heater circuit helps the sensor stay in its optimum temperature range ...  
O2InputMod 05 Jun 2006 - 17:48 - r1.3 Home.almskidd
See http://www.marklamond.co.uk/tech-honda/pgm-fi/o2-input/o2-input.htm for details this lets you modify you ecu for 0-5v input. The ADC is converts the analogue voltage ...  
OBD 31 Mar 2007 - 03:45 - r1.2 Home.racingsky
On Board Diagnostics General Overview In an effort to reduce vehicle emissions, the California Air Resource Board (CARB) required that an on board diagnostic system ...  
OBD0 07 Apr 2006 - 03:20 - r1.6 Home.carotman
"OBD0" is not an official standard like OBD2 . It is most usually used to refer to MPFI ECUs made from 88-91 with ElectronicAdvanceDistributors found on OBD0MPFI ...  
OBD0BACKUP 20 Feb 2004 - 00:37 - NEW Home.blundar
the BACK0004 Processor made by NEC is present in all OBD0MPFI ECUs. It runs the car when the CEL is lit solid red and the ECU is in LimpMode .  
OBD0CN3 19 Feb 2004 - 22:01 - NEW TWiki Guest
OBD0 ECU s generally have a 5 pin serial port labelled "CN3" This is the same pinout and has the same function more or less as OBD1CN2  
OBD0CodeCompatibility 12 Jul 2005 - 19:25 - r1.3 Home.4G vtec
Can you run code from one OBD0MPFI ECU in another? The short answer to this is yes. The following has been tried before and is known to work successfully: PM6 in PR4 ...  
OBD0ECUAUTOTOMANUALWITHOUTREMOVEANYHARDWARE 09 Jan 2007 - 17:51 - r1.2 Home.defensio
I have tested it in my CRX SI 91 with CIVIC SI 90 Auto ECU(pm6) and it work perfectly. This is why its not necessary to remove anything in the Auto Ecu to Run with ...  
OBD0InterChipCommunication 17 Feb 2004 - 09:44 - NEW Home.tungsten2k
There are several chips connected to the Oki83C154 or Oki80C154 MCU : NEC UPD7004C ADC 5128XRAM external SRAM Oki6260A IO controller 38256 EPROM (32k) in some cases ...  
OBD0MPFI 30 Jan 2006 - 07:24 - r1.5 Home.carotman
There is a very distinct family of ECUs found in 88-91ish OBD0 hondas. The main characteristics of this family: Oki80C154 or Oki83C154 MCUs that are essentially Intel8051 ...  
OBD0Oki83C154Reader 05 Mar 2004 - 17:56 - NEW Home.blundar
Dave says: Well, borrowing an idea from Nico-HRED/Doc used in the 66Ks, here is a program that should read out the contents of a 83C154 MCU. It assumes that you have ...  
OBD0PR4 20 Feb 2004 - 00:37 - NEW Home.blundar
OBD0 PR4 ECUs from the USDM (and JDM?) 1.8L B18A-powered Integra have some quirks: There are two versions of the ECU, each using the same circuit board. One uses ...  
OBD0StockDatalogging 19 Feb 2004 - 22:01 - NEW TWiki Guest
The serial interrupt code in the stock ECU is very simple. A 1 byte hex address is sent to the ECU, and the ECU responds with the contents of RAM memory at that address ...  
OBD0VtecECUs 19 Feb 2004 - 22:01 - NEW TWiki Guest
The OBD0 VTEC ECU's are the PR3 and the PW0. These ECUs ran the B16A1 in OBD0 cars from 89-91. There is no code interchangeability between the two ECU's. They use ...  
OBD1CN2 31 Oct 2005 - 01:53 - r1.7 Home.fred
CN2 is the connector to the serial port on an OBD1 ECU. Here's the pinout of the Dataconnector IN a Honda ECU: 1: GND 2: RX (send Data from the PC to the ECU) 3: 5 ...  
OBD1CivTegRoutines 19 Feb 2004 - 22:01 - NEW TWiki Guest
Some routines have already been commented for your viewing pleasure. P30 (203) DocECUSchool Doc explains some of how IO is performed looking at the JDM P30 203 ROM ...  
OBD1CivicIntegraAutoManual 10 Feb 2006 - 20:34 - r1.3 Home.drdisco69
USDM RP17 and RP18 values: J Automatic Manual RP17 4.7k Ohm Open RP18 2.7k Ohm Jumpered JDM RP18 values: J Automatic Manual RP18 2.4k Ohm 1.4k Ohm JDM Auto to Manual ...  
OBD1CivicIntegraECUs 21 Feb 2006 - 08:00 - NEW Home.dj_spark
Almost all OBD1 ECU s used in 92-95 Civics and integras (but NOT preludes, accords, legends, etc.) are more or less electrically compatible. With minor tweaks, all ...  
OBD1CodeCompatibility 22 Jun 2004 - 15:34 - NEW Home.blundar
OBD1CivicIntegra ECU s are a common hardware platform. What this means is that you can (with minor modifications) run essentially any code on any ECU in the family ...  
OBD1J1 19 Feb 2004 - 22:01 - NEW TWiki Guest
J1 on OBD1 ECU s controls the state of EA . It is used to change whether the MCU uses an external ROM or internal program.  
OBD1J12 05 Mar 2004 - 19:26 - NEW Home.blundar
In its stock configuration, an OBD1 car has a diagnostic connector under the dash which is wired to the ECU's serial port. The ECU's serial port is also wired to OBD1CN2 ...  
OBD1Oki66207Reader-DIP64 05 Mar 2004 - 18:16 - NEW Home.blundar
First of all i'll thank Nico-HRED again for the info he posts in the general forum about the "66P507 Readout". I adapted the idea and simplified it, so everyone of ...  
OBD1Oki66207Reader-PLCC68 08 Jun 2006 - 00:20 - r1.2 Home.synoptic
After doing Doc's mod to read out the stock rom from a Australian P30 ecu with the 66207 in a 64 pin dip config, I started thinking that somewhere on the web I saw ...  
OBD1P08AutoManual 25 Nov 2006 - 13:52 - r1.3 Home.kesnut
RP17 and RP18 values Automatic Manual RP17 2.7K open RP18 4.7K jumped this is for board pn: 02d01550-1500 Auto to Manual: remove rp17 remove rp18 add a jumper to ...  
OBD1P13AutoManual 19 Sep 2006 - 17:33 - NEW Home.carotman
Most Auto Ecus have a jumper at RP11 and have a blank space at RP12. Move RP11 to RP12 and you now have a Manual ECU. Here a closeup of the JDM Jumper configuration ...  
OBD1_8bitMBar 21 May 2005 - 03:50 - NEW Home.bigwig
Assuming that the stock map sensor's maximum reading is 1764 Mbar, the formula to convert MAP byte value is ((1764 / 255) OBD1 8bitMBar / 2). When the rom's map value ...  
OBD2A 31 Mar 2004 - 18:21 - NEW Home.blundar
OBD2A refers to the OBD2 ECUs made from 96-98  
Oki6260A 02 Mar 2005 - 13:31 - r1.5 Home.l3st4rd
The Oki 6260A was manufactured for Honda by Oki. J. Wong has this to say: "I was just cleaning out my cube and just happened to run across a piece of paper with 6260A ...  
Oki83C154 05 Mar 2004 - 17:44 - r1.2 Home.blundar
MCU used in OBD0MPFI ECU s that has 16k on-chip code memory. Usually copy protected, but there are McuReaders. It is mostly 8051 compatible, and features a third ...  
OneWireTo4WireO2Sensor 22 Apr 2004 - 02:59 - NEW Home.Jim Truett
If you have an ECU that lacks the O2 heater circuitry such as a P05, it is easy to enable this functionality. To convert a P05 to pretty much anything else, you need ...  
P04 01 Mar 2006 - 12:32 - r1.6 Home.1net
The P04 came in European cars. I'm not sure which years or models, so someone fill this in. They look nearly identical in design to late model PM5 ECUs. 1992 Civic ...  
P05 28 Dec 2005 - 06:36 - r1.2 Home.4g vtec
P05 92-95 OBD1 Civic CX (D15B8) The P05 ECU came with the D15 SOHC non-vtec motor with close-coupled cat and a 1-wire O2 sensor in the 92-95 Civic CX. Basically an ...  
P08 30 Mar 2004 - 02:18 - r1.2 Home.eg6ajk
P08 92-95 OBD1 Civic/CRX VTi/VXi (D15B sohc vtec) 1 Wire O2, otherwise pretty similar to P28 .  
P13 19 Sep 2006 - 17:13 - r1.15 Home.carotman
P13 93-95 OBD1 Prelude Vtec (H22A DOHC Vtec) RAM Location Bytes Description Notes 00A4 1 MAP sensor 00AB 1 Tps Sensor OBD1 8bitTPS 00AE 2 RPM in 16bit form 00D9 1 ...  
P14 26 Jan 2007 - 23:58 - r1.3 Jared Karagen?
P14 93-95 OBD1 Prelude Si (non Vtec H23A) There are at least 2 versions of this ECU: One with and one without knock sensor. The ECUs with a knock board have R118 ...  
P1J 29 Jan 2007 - 16:14 - NEW Home.1net
P1J and P1K come from 96-00 UK civics with D14 engines. Despite the years, those are OBDI ECUs and seem to be easyly convertable for vtec Sorry for the bad images ...  
P1K 29 Jan 2007 - 16:06 - NEW Home.1net
P1J and P1K come from 96-00 UK civics with D14 engines. Despite the years, those are OBDI ECUs and seem to be easyly convertable for vtec Those OBDI P1J or P1K ECUs ...  
P28 26 Jul 2005 - 21:54 - r1.8 Home.-anton-
P28 92-95 OBD1 Civic Si/Ex and Del Sol(SOHC VTEC D16Z6) scan of auto: http://pgmfi.org/resources/FAQ/scans/P28autoback.jpg scan of auto (thanks turboef9): http:/ ...  
P30 23 Mar 2007 - 11:36 - r1.27 Home.johncui
P30 (Rom #203) P30-G01 95 Uk Civic Vti Hatch, Big case one. Uses CPU's internal rom, but has space for external rom. Ran code from rom above OK but needed knock sensor ...  
P39 15 Mar 2006 - 14:33 - r1.3 Home.carotman
P39 92-95 OBD1 JDM PRELUDE BB4 DOHC Non-VTEC(F22B)  
P71 30 Mar 2004 - 02:26 - NEW Home.eg6ajk
P71 92-95 OBD1 Integra (d16a nonvtec)  
PG7 30 Oct 2004 - 16:18 - r1.4 Home.TJ
PG7 : 86-87 Integra (D16A1 vacuum advance) PG7 : 88-89 Integra (D16A1 electronic advance) Note: The bastards at honda designated two very different ECUs with the ...  
PH3 30 Jan 2006 - 07:20 - NEW Home.carotman
THe 88-89 Accord OBD-0 B20A ECU uses an Electronic Advance distributor. It has an External 27c256 ROM and is oki 80c154 based This ECU is very similar to the PK2 ECU ...  
PJ0 29 Dec 2006 - 20:25 - r1.3 Home.carotman
The A20A 86-89 Accord/Prelude PJ0 ECU had many revisions in different countries. Some of them will lack an O2 sensor or EGR control. However, they all use a vacuum ...  
PK2 18 Oct 2006 - 08:41 - r1.5 Home.chen
Prelude OBD-0 B20A ECU. Electronic Advance. External 27c256 ROM. oki 83c154 based pk-2 ecu photo.: I posted the Options Close-up for the PK2-6640 manual B20A ECU. ...  
PL2 19 Feb 2004 - 22:55 - r1.2 Home.blundar
PL2 : 8?-88+ Acura/Rover V6 (C25/C27)  
PM5 08 Jul 2005 - 14:52 - r1.3 Home.1net
PM5 88-91 Civic base model/CRX DX (DPFI D15b) There were two distinct styles of this ECU. One features an 83C154 MCU, one features a 66201 MCU. Presumably 88-89 vs ...  
PM6 11 Apr 2005 - 22:08 - r1.3 Home.drdisco69
The PM6 came in 88-91 USDM D16A6 powered Civic and CRX Si. The PM6 is a major development platform. See the 8XC154 Dev Forum for current happenings. ATTACHURL /PM6 ...  
PM7 25 Mar 2006 - 22:12 - r1.4 Home.Orion
The PM7 ECU was used (mainly) in 88-91 DOHC ZC motors in Europe and Japan. PM7 code is very similar to PM6 code, and the code from one ECU can be run on the other ...  
PM9 17 Jun 2004 - 04:28 - r1.4 Home.warrick
Essentially a PM5 The PM5 PM9 are essentially the same ECU. I think one may have been for the 4 speed and one the 5 speed, but I'm not sure. (blundar) The PM9 that ...  
PP5 12 Mar 2005 - 01:08 - r1.6 Home.crex
PP5 : 90-93 (??) UK Rover 216 Cabrio Rover (UK) had an agreement with honda where honda engines (ZC, most notably) ended up in Rover cars. They continued to use OBD0 ...  
PR3 29 Jan 2005 - 07:10 - r1.4 Home.noriega
PR3 89-93 JDM B16A EF8/9 MCU M66x301 58 and 93 Note: There are both OBD0 and OBD1 ECUs designated "PR3" and they are not in any shape or form compatible with each ...  
PS9AutoManual 06 Jan 2006 - 03:43 - r1.3 Home.voodooboy520
Remove R62,R64,R66 right by the center divider to turn an auto ECU into a 5 spd. JDM ECUs also require the addition of BR3. This also applies to PG7, PM6 and PM7 ECUs ...  
PT3 25 Mar 2006 - 19:57 - r1.3 Home.acclude
PT3 90-93 OBD1 USDM Accord SOHC non-vtec F22A1 This ECU shares the shares the same PC board with the EDM PT5 Accord ECU (02D01190-1504) Scan: http://pgmfi.org/resources ...  
PT5 08 Feb 2006 - 06:23 - NEW Home.carotman
PT5 90-93 OBD1 EDM Accord SOHC non-vtec F20A7 This ECU shares the shares the same PC board with the PT3 Accord ECU (02D01190-1504)  
PW0 11 Mar 2004 - 10:33 - NEW Home.introspeed
PW0 89-91 JDM/Euro B16A EF8/9 DA6-XSi (DOHC VTEC) M66x301 scan of PW0-000 http://pgmfi.org/resources/FAQ/scans/PW0-000 component1.jpeg scan of PW0-000 http://pgmfi ...  
PW1 16 Apr 2006 - 02:16 - NEW Home.Orion
This is the ECU I have in my '93 Concerto with a D15b2.  
PartsForECUs 14 Apr 2007 - 17:07 - r1.13 Home.thc07
Value Description Board Locations Used for Notes DigiKey # Digikey Price 22pf Cap Ceramic Disk C75 , C89 , C72 , C74 1330ph-nd 0.072 .1uf Cap Ceramic Disk C51 , C52 ...  
PeakAndHoldInjectors 19 Feb 2004 - 22:01 - NEW TWiki Guest
Peak And Hold Injectors aka LowImpedanceInjectors. Impedance typically ~2-5ohms. At 12volts, this is a draw of ~6-2.4 amps The high current will cause the injectors to ...  
PiggyBack 07 Apr 2005 - 21:24 - NEW Home.blundar
A PiggyBack controller is a device that "piggybacks" on top of the ECU. Piggybacks intercept signals coming from the engine and alter them before they reach the ECU ...  
PreludeAccord 16 May 2005 - 14:26 - r1.2 Home.sloopy
OK, here is what I know about these ECUs. The PT6-A51 I have here has a 66911 MCU and uses an external 256k PROM. I got an ECU out of a 1994 Prelude SI with a 1.6 ...  
PressureAtmosphere 30 Mar 2006 - 13:07 - NEW Home.edurmus
the atmospheric pressure sensor, also called ''barometric pressure'' or ''PA'' sensor measures a much narrower range of pressure centered(??) around atmospheric pressure ...  
ProposedDataloggingProtocol 20 Feb 2004 - 00:37 - NEW Home.blundar
This is a working draft of a proposed protocol to replace the stock serial interrupt handler. It is intended to be cross platform (i.e. both OBD0MPFI ECUs and OBD1CivicIntegraECUs ...  
RTP 19 Feb 2004 - 22:01 - NEW TWiki Guest
Real Time Programmability The ability to change the program/tuning of an ECU while the ECU is running the motor. Currently, only the http://www.zdyne.com Zdyne SECU ...  
RTPProject 19 Feb 2004 - 22:01 - NEW TWiki Guest
blah blah, describe this later. http://www.pgmfi.org/phorum/read.php?f 5 i 3968 t 3968 messageboard link . Here's an incomplete part ordering list so far. Parts list ...  
RealTimeProgramability 19 Feb 2004 - 22:01 - NEW TWiki Guest
A system where the EPROM of the ECU is replaced with a custom system that is programable in real-time. This allows you to make changes to the code while the engine ...  
RealTimeProgramming 26 May 2004 - 18:52 - r1.6 Home.hackish
Used for tuning your ecu and making changes to it on the fly. Hardware EasyRtpV1.0 Easy-RTP v1.0 Dave's single sided adaptation of Doc's original DS1230Y based design ...  
ReplaceM5128 27 Feb 2004 - 17:59 - NEW Home.synoptic
This page explain how to replace the current 5128XRAM 2K SRAM chip by a DS1220 NVSRAM for future RTP solution. TOC Brief Explanation The M5128 chip is used to store ...  
RomEditor 20 Feb 2004 - 00:37 - NEW Home.blundar
PGMFI.ORG-made Software software written by forum members to help with ECU tasks ASM662 AndySloane's open source Oki NX8/200 code 66K assember/disassembler suite ...  
RomEmulator 19 Feb 2004 - 22:01 - NEW TWiki Guest
ROM Emulators "look" like a ROM to whatever you connect them to. In most cases here, that would normally be an ECU. The most important feature of a RomEmulator compared ...  
RomMaps 12 Apr 2004 - 02:07 - r1.6 Home.SYnoptic
Rom Maps An area to collaborate on all the memory addresses found in ROMs TOC OBD1 Civic and Integra ECUs OBD1CivicIntegraECUs share a lot of features Memory Locations ...  
SecondGenUsbToSerialConverter 13 Feb 2005 - 07:53 - r1.6 Home.markolson
A company named http://www.elexol.com Elexol makes a second generation serial-to-USB port adapter called the http://info.hobbyengineering.com/specs/USBMOD3.pdf USBMOD3 ...  
SerialAdapter 22 Jun 2004 - 02:12 - r1.2 Home.phiz
All Honda ECUs use 5v TTL signaling for serial communication . In order to connect to an ECU, if the hardware used for DataLogging doesn't support this, you must use ...  
Sim 28 Jan 2007 - 12:26 - r1.3 Home.b16a2
This is a Engine Simulator I build to help me out with hardware Development. Its basicly built into a rack mount computer case and uses a ATX 350W power supply. http ...  
SolderingIron 19 Feb 2004 - 22:01 - NEW TWiki Guest
Soldering Irons come in all shapes and sizes. Some basic guidelines: Generally, a grounded iron (3-prong) will work better than an ungrounded one. You don't need a ...  
SparkCut 19 Feb 2004 - 22:01 - NEW TWiki Guest
A spark cut is when fuel continues to be supplied to the motor but no sparks are triggered to ignite the fuel. This is a good way to shoot flames out of the back of ...  
SpeedDensity 26 May 2004 - 17:39 - NEW Home.blundar
What is a SpeedDensity engine managment scheme? SpeedDensity systems calculate the amount of air entering a motor using sensors that monitor engine operating conditions ...  
SpeedLimiter 01 Jun 2005 - 20:37 - NEW Home.hondainfo
A speed limiter limits the top speed of a car. In almost all hondas, a SpeedLimiter will be implemented as a piece of code that reads the VehicleSpeedSensor and cuts ...  
TpsSensor 05 Mar 2004 - 20:03 - r1.2 Home.blundar
The TPS or Throttle Position Sensor determines the angle of the ThrottlePlate in the ThrottleBody and depending on other info from the MapSensor, OxygenSensor, and ...  
TroubleshootingSolidCEL 27 Dec 2004 - 18:16 - r1.2 Home.markolson
Solid CELs are arguably one of the easier problems to troubleshoot because there are relatively few things that cause them to happen. A "solid" CEL occurs when there ...  
TuningForSmog 19 Feb 2005 - 22:08 - NEW Home.markolson
How to tune to pass a smog test The situation: We are trying to get our 88CRX B16A swap past the CA smog ref, so tuning for smog is exactly what we are trying to ...  
TuningTiming 10 Apr 2006 - 12:01 - r1.2 Home.edurmus
Tuning ignition timing is not a simple topic. Lots of factors change optimal ignition timing chemistry stuff, mechanical stuff, etc. etc. A true understanding of ...  
TurboEdit 14 Jun 2005 - 09:05 - r1.4 Home.4thgen91efhatch
Turbo Edit is JasonParker 's OBD0MPFI ROMEditor . It seems to be picking up where GhettoDyne left off. See http://www.TurboEDIT.org/ or the http://forum.pgmfi.org/viewforum ...  
UPD7004C 27 Jun 2005 - 10:08 - r1.7 Home.1net
The NEC UPD7004C is an ADC chip found in OBD0MPFI ECUs. Documentation on it was very hard to find. :) We looked and googled for months, and then finally I emailed ...  
USDM 19 Feb 2004 - 22:01 - NEW TWiki Guest
United States Domestic Market cars destined/made for the United States. Compare to: EDM , JDM Note: USDM OBD1CivicIntegra ECU s generally are the most feature-filled ...  
UberDataFAQ 19 Feb 2004 - 22:01 - NEW TWiki Guest
Uberdata FAQ Stupid newbie tard Uberdata FAQ Author: Blake Warner Email: uberteg@cox.net, vertigo118@cox.net Notes: Remember to donate if you use and enjoy this software ...  
UnderstandingMaps 21 Nov 2005 - 19:26 - r1.2 Home.ben ogle
Understanding Fuel and Ignition Maps. Fuel Maps Below around 80 throttle, the ECU uses the oxygen sensor in conjunction with the fuel tables to calculate how much ...  
UsbToSerialConverterSecondGen 22 Nov 2004 - 23:01 - r1.2 Home.blundar
A company named http://www.elexol.com Elexol makes a second generation serial-to-USB port adapter called the http://www.ravar.net/download/USBMOD3.PDF USBMOD3 . Many ...  
VacuumAdvance 20 Feb 2004 - 00:23 - NEW Home.blundar
Vaccuum Advance is a purely mechanical method for varying the amount of SparkAdvance based on engine load. A vac-advance distributor is connected to a source of engine ...  
VehicleSpeedSensor 27 Sep 2005 - 10:22 - r1.2 Fast Hatch?
The Vehicle Speed Sensor ( VSS ) tells the ECU how fast the car is moving. In most hondas, it pulses to ground 4 times per revolution of the axles. Most OBD0 cars ...  
VolumetricEfficiency 26 May 2004 - 18:07 - r1.2 Home.blundar
Volumetric Efficiency (VE) is a comparison of the real world volume of air/fuel mixture drawn in and the actual volume of the cylinder if it were completely filled ...  
VtecSolenoid 29 Sep 2004 - 21:45 - r1.2 Home.Bulter
The Vtec solenoid is a solenoid that is controlled by the ECU. When a 12v signal is applied to it, it opens allowing oil pressure to switch from the LowCam to the ...  
WarningAboutAddingAKnockSensor 26 Jan 2006 - 05:12 - NEW Home.synoptic
The knock sensor frequency, and thus, its operation, is affected by the bore of the cylinder. From what I can tell, each ECU's knock board is also dialed in to specific ...  
WebHome 30 Mar 2007 - 22:03 - r1.26 Home.racingsky
Welcome to the PGMFI Library! If at any time you wish to return to this main wiki page, click the Project PGMFI logo. THIS IS A NEW WIKI ENGINE. PLEASE SEND EMAILS ...  
WebStatistics 07 Nov 2007 - 15:33 - r1.261 TWiki Guest
Statistics for Library Web Month: Topic views: Topic saves: File uploads: Most popular topic views: Top contributors for topic save and uploads: Nov 2007 19044 0 ...  
WhatYouNeed 11 Apr 2005 - 22:19 - r1.6 Home.drdisco69
"Chipping" an ECU means replacing the program running the ECU . Chipping is just slang. What we actually do is program (or "burn") a new bin file to the ROM to replace ...  
WhyDoPiggybacksSuck 07 Apr 2005 - 21:22 - NEW Home.blundar
I got tired of typing this repeatedly on discussion boards, so I decided to add it here. If you don't know what a PiggyBack controller is, read about it first. PiggyBack ...  
WideBandO2 17 Feb 2006 - 19:56 - r1.6 Home.kabuki
What is a Wideband O2 sensor It is an OxygenSensor that gives stable output over a much larger range than standard 1-wire or 4-wire oxygen sensors. It is helpful ...  
Willem 24 Nov 2005 - 00:08 - r1.4 Home.4g vtec
The http://www.willem.org Willem programmer is essentially an open design / open source ROM burner. It is far from a polished design the software was very buggy and ...  
WireHarness 12 Apr 2006 - 06:13 - r1.3 Home.Ace0246
A WireHarness is a term for the connetors and wires that are connected to the ECU. OBD0 , OBD1 and OBD2 all have different connectors and there are different wire ...  
XE5 19 Feb 2004 - 22:55 - r1.2 Home.blundar
88-91 (dates questionable?) Mugen Race platform (ZC) The XE5 code is derived from the PM7- specifically, the PM7-0330 that lacks an O2 sensor. It is a "race only" ...  
ZIF 10 Mar 2004 - 21:24 - NEW Home.blundar
ZIF stands for Zero Insertion Force. ZIF sockets are commonly used in ECU s where the EEPROM will be removed and reinserted frequently. "ZIFing an ECU" is when you ...  
_EA 19 Feb 2004 - 22:01 - NEW TWiki Guest
EA (EA Prime) is a pin on the MCU that controls whether the MCU runs off Internal ROM or an external ROM chip. EA is pin 31 on 40-pin Intel8051 MCU s OBD1J1 J1 on ...  
uncorked 19 Feb 2004 - 22:01 - NEW TWiki Guest
The stock code divides the MapSensor reading by two. This caps the maximum pressure the ECU can respond to by half the maximum of what the MapSensor is capable of ...  

Number of topics: 193

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