Wiring
Auto To Manual
Most automatic ECUs can be converted to a 5spd rather easily. Going the other way often involves adding more components.
Non Vtec-To-Vtec
In most cases, it is relatively simple to convert nonvtec ECUs to VTEC. The same PCB was used in several ECUs, with comp...
O2 Heater Circuit
the O2 heater circuit is what makes 4wire Oxygen Sensors different from 1wire sensors. The heater circuit helps the sens...
OBD1
"OBD1" is generally used to refer to honda engine electronics from 9295. Accords/Preludes used OBD1 connectors as early...
OBD1 Code Compatibility
OBD1 Civic Integra ECUs are a common hardware platform. What this means is that you can (with minor modifications) run e...
OBD2
OBD2 On Board Diagnostics 2 A standard in the US established in 1996 specifying standard methods for accessing vehicle e...
02D01720-1500
To convert a "1720" board from nonvtec to VTEC add the following parts: Required: Q26: C2785 (note: I used a C144 and it...
02D01980-1500
Editor's note: the small list does not appear to have the required parts for the IABsAuthor: eg6ajk Date: 052403 15:10 m...
1 Wire VTEC
The 1wire VTEC codebase is a ROM for the OBD0 MPFI ECUs that allows the Automatic Transmission Lockup Solenoid to be use...
29C010
The ATMEL AT29C010 chip is a FLASHROM chip with 1Mbit(~128kb) of memory. It can be found in old Pentium I&II computer mo...
5050s
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 no...
Ac Switch
You have to jump the A/C Thermostat switch under the dash it is a 2P connector blue taped to the harness by the heater b...
Acura Integra PR4 OBD0 ECU Pinouts and Wiring
Wiring layout, pinout details, and schematic analysis for the OBD0 and OBD1 Acura Integra PR4 ECU.
ADC
Analog to Digital Converter: An integrated circuit (IC) which converts an analog signal to a digital representation.
Add A Knock Sensor
Adding a knock sensor to an engine that did not come with one.
Atmospheric Pressure
Atmospheric pressure refers to the gas pressure of air. At sea level, it is approximately 14.7 psi, 1 bar or 100KPa.
Automatic Accord OBD2-to-OBD1 ECU and TCU conversion
Wiring conversion guide and pinout translation tables to run an automatic OBD2a Accord using an automatic OBD1 Integra E...
BAR
One BAR is equal to 14.7 psi. Also called ""atm"" or ""atmospheres"" because it corresponds to atmospheric pressure at s...
Calendar Plugin
The Calendar Plugin can be used to generate a monthly calendar in a wiki page. It's handy for Personal Wikis.
CEL
Check Engine Light This indicator (usually on the dash) comes on to indicate that the ECU thinks something is wrong.
Combustion Chamber
the combustion chamber is an area of the Cylinder Head where the Spark Plug sits to ignite air and fuel.
Conversion
Describe Conversion here. Conversion is the act of modifying the Wire Harness at the ECU so you can fit ohter Generation...
Converting the OBD1 P14 ECU to P13 (H23A to H22A)
Step-by-step component conversion guide to hardware-modify a non-VTEC OBD1 P14 ECU to function identically to a VTEC P13...
Cruise Control Switch
Author: tungsten2k (12240101225.client.attbi.com) Date: 091903 01:36 fyi, for you EF people out there lookin' to do your...
D16Z6-4G-swapnotes
Detailed notes on swapping an OBD1 D16Z6 engine into a 4th generation (1988-1991) OBD0 Civic or CRX, focusing on mechani...
Desoldering Braid
Desoldering braid is a fine woven generally copper wire used to remove solder by using the "wicking" action that draws l...
DIY Datalogging Cable via Nokia FBUS Modification
Technical guide to converting a legacy Nokia FBUS serial phone cable into a low-cost USB-to-TTL serial adapter for OBD1...
EDM
European Domestic Market cars produced for Europe Compare to: JDM, USDMNote: EDM OBD1 Civic Integra ECUs generally lack...
Honda Data Link Connector (DLC) Reference
Technical reference and location guide for the Honda 3-pin and OBD2 16-pin Data Link Connectors (DLC).
Honda OBD Generations Guide (OBD0, OBD1, OBD2a, OBD2b)
An overview of Honda On-Board Diagnostics generations (OBD0, OBD1, OBD2a, OBD2b). Learn their differences, connector lay...
How Does Data Logging Work
There are a number of programs that enable you to log data about how your engine is working by reading information out o...
Index of Honda ECU Connections & Pinouts
An index of Honda and Acura ECU connector pinouts, wiring diagrams, and harness conversion guides across OBD0, OBD1, and...
Inter Wiki Map
The Inter Wiki map used on this wiki is listed below. The map is taken from the text in the verbatim block below.
Kurts OBD0-OBD1
Step-by-step instructions for converting an OBD0 chassis wiring harness to run an OBD1 ECU.
Maf Sensor
The Mass AirFlow Sensor directly measures the mass of the air entering the engine. This is accomplished using either a f...
Magic Php Wiki UR Ls
About phpwiki: URLs A special type of URL is available for making links to perform administrative and other special func...
Mcu Readers
All of the MCU readers described here take advantage of a design flaw of oki MCUs (and the design flaw is present on all...
NVSRAM
NVSRAMNon Volatile SRAM fast, byte addressible, byte write, RAM that retains its contents after power is lost.
OBD0 Conversion Formula
Describe OBD0 Conversion Formula here. OBD016 Bit RPM is used for revlimiters, target idle and most other 16bit RPM valu...
OBD0 ECU Auto to Manual Conversion
Hardware trick to bypass the automatic transmission lock-up solenoid check on OBD0 Honda ECUs using a 220-ohm resistor.
OBD0 Oki83C154 Reader
Dave says: Well, borrowing an idea from NicoHRED/Doc used in the 66Ks, here is a program that should read out the conten...
OBD0CN3
OBD0 ECUs generally have a 5 pin serial port labelled "CN3"This is the same pinout and has the same function more or les...
OBD1 8bit Low Cam RPM
This is the conversion from the "low cam" 8bit RPM values used for VTEC crossover points and in the lowcam tables.
OBD1 Civic/Integra Auto to Manual Conversion
Convert USDM and JDM OBD1 Civic/Integra ECUs between automatic and manual configurations by changing resistor board valu...
OBD1 Conversion Formulae
OBD18bit Low Cam RPM eight bit values used for lowcam tables and VTEC crossover points OBD18bit High Cam RPM eight bit v...
OBD1 ECU Chipping Wirelist
Pin connections and traces between the MCU, latch, and external EPROM socket on OBD1 Honda ECUs.
OBD1 Oki66207 Reader-DIP64
First of all i'll thank NicoHRED again for the info he posts in the general forum about the "66P507 Readout".
OBD1 Oki66207 Reader-PLCC68
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 start...
OBD1CN2
CN2 is the connector to the serial port on an OBD1 ECU. !CN2location.jpgHere's the pinout of the Dataconnector IN a Hond...
OBD1J12
In its stock configuration, an OBD1 car has a diagnostic connector under the dash which is wired to the ECU's serial por...
OBD1P13 Auto Manual
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.
OBD2 Oki66507 Reader Nico
Author: HRED (ABordeaux103110174.abo.wanadoo.fr) Date: 093002 13:13 Here you can readout 66P507... Nico Block diagram of...
OBD2B
OBD2B refers to 9900 Civic ECUs. They have a very slightly different connector layout than OBD2A ECUs.
OBD2P5M Auto Manual
This is a very simple conversion. Move the SMD 0 ohm resistor from location RP13 on the bottom of the PCB to location RP...
P05
P05 9295 OBD1 Civic CX (D15B8) The P05 ECU came with the D15 SOHC nonvtec motor with closecoupled cat and a 1wire O2 sen...
P07
P07 9295 OBD1 Civic VX (D15Z1) Unique in that it has two 66207 processors (one presumably for the wideband O2) Note: 303...
P08
P08 9295 OBD1 Civic/CRX VTi/VXi (D15B SOHC VTEC) 1 Wire O2, otherwise pretty similar to P28. Attachment: Modify: Size: D...
P0A
P0A 9495 OBD1 Accord EX attached pic is a 94 P0AA51 PCB is IPT 02D010B01502 The data below has been copied over from the...
PCB
PCB stands for printed circuit boards. PCBs are the boards ECUs and computers in general use. They are made by printing...
Peak And Hold Injectors
Peak And Hold Injectors aka Low Impedance Injectors. Impedance typically ~25ohms. At 12volts, this is a draw of ~62.