5th Gen (EG) - Honda Knowledgebase

Generation · Knowledgebase

5th Gen (EG)

1992-1995 EG, EH, EJ

323 articles

Honda OBD0/1 ECU Component List

Honda OBD1 ECU Reference (1992–1995)

Peak and Hold (Low Impedance) Injectors

Cars · Sensors

Adding 1-Wire VTEC Control to OBD0 ECUs (PM6)

Cars · Diagnostics

OBD1 ECU IACV Circuit Repair: R58, R59, and Q21

Cars · Diagnostics

P2P

Cars · Diagnostics

PK2

Cars · Diagnostics

Speed Density

Chipping the JDM OBD1 P30 ECU

OBD0 Engine Control Units (1988–1991)

OBD1 PR4 ECU Hardware Reference

Automatic to Manual ECU Conversion

Cars · Honda / Civic / Eg / Sensors

OBD1P08 Auto Manual

Cars · Honda / Civic / Eg / Sensors

P27

Cars · Reference

PGMFI Administrative Contributors

Cars · Reference

Honda and Rover Technical Collaboration

Cars · Sensors

Oki 66K Assembly Language Routines for Honda ECUs

Cars · Sensors

Chipping OBD1 Small-Case ECUs

Cars · Sensors

Guide to Honda ECU Hardware Modifications

Cars · Sensors

Atmospheric Pressure (PA) Sensor Technical Reference

Cars · Diagnostics

Understanding Boost Cut

Cars · Diagnostics

Honda OBD0 and OBD1 ECU Datalogging Overview

Cars · Sensors

Electronic Component Sourcing for ECU Repair

Cars · Diagnostics

Honda ECU Engine Simulator Reference

Cars · Sensors

Real Time Programming (RTP) Hardware

Cars · Sensors

UberData Tuning Software Overview

Cars · Diagnostics

Real-Time Programming (RTP) for Honda ECUs

Cars · Diagnostics

Honda ECU Serial Communication Adapters

Understanding Boost Pressure

Turbocharger Boost Controller Reference

check8 8-Bit ROM Checksum Utility

Understanding the ECU Fuel Map Column Multiplier

Cars · Diagnostics

Throttle Plate Operation and Function

Crome ROM Tuning FAQ

Crome ROM Editor Overview

Cars · Diagnostics

Troubleshooting a Solid CEL

Crome JavaScript Scripting API

DAC

Understanding Dec At Addy

Cars · Diagnostics

WinHex Hexadecimal Editor for ECU Tuning

Disabling VTEC VSS Check on P28 ECUs

Dual-Map ROM Tuning for Honda ECUs

SST27SF256 Flash Memory Reference

Oki 66K Processor Resources

Honda ECU Dual-Table ROM Structures

74HC373 Octal Latch IC

EA (EA Prime) Pin Functionality

DIY Easy-RTP v1.0 Build and Installation Guide

ECU Boost Control Implementation

Understanding ECU Binary (.bin) Files

ECU Nitrous Control Implementation

Thread-Locking Compound Selection and Application

Electronic Boost Controller Fundamentals

Electronic Part Supplier Reference

Chipping the OBD0 PM6 ECU (1988–1991 Civic/CRX Si)

Fuel Cut Operation and Theory

Ghetto Dyne Tuning Platform

Sourcing Memory Chips for Honda OBD0 and OBD1 ECUs

Installing and Configuring the Add Extra Features Plugin for Crome

Ideal Gas Law in Speed-Density Tuning

Introduction to ECU Chipping

Honda ECU Launch Control (Two-Step) Implementation

Honda MAP Sensor Voltage Calibration Equations

Easy-RTP v1.0 OBD1 Installation Guide

Multiprocessor Communication Protocols

OBD1 Honda ECU Routine Reference

Honda ECU EPROM Compatibility Reference

OBD1 ECU J1 Jumper Configuration

FLASH Memory Architecture

Converting Intel HEX Files to Binary (BIN)

Intel 8051 Development Reference

Piggyback Engine Management Controllers

Honda ECU Internal ROM Architecture

Latch Logic and ECU Implementation

Pocket Programmer 2 Technical Overview

Honda ECU Microcontroller (MCU) Overview

Atmospheric Pressure (PA) Sensor Reference

Understanding Relative Pressure in Engine Tuning

Read Only Memory (ROM) Architecture

One Time Programmable (OTP) EPROM

ROM Editor Overview

Honda ECU Component Sourcing Reference

Honda ECU Serial Datalogging (`CN2` TTL Header)

Throttle Body Overview

Turbocharger Fundamentals

Turbo Compressor Map

Red Loctite Thread-Locking Compound

Introduction to TurboEdit (OBD0 Honda Tuning)

Uberdata and ERM Tuning Editors

ROM Emulator Technical Overview

UberData Tuning FAQ

UV EPROM Erasure Procedures

VTEC Crossover Point Calibration

Technical Considerations for Retrofitting Knock Sensors

Turbocharger Wastegate Operation

Technical Limitations of Piggyback ECU Controllers

Zero Insertion Force (ZIF) Sockets for ECU Tuning

Cars · Fueling

Fuel Pressure Tuning and Specifications

Cars · Fueling

Mass Air Flow (MAF) Systems

Cars · Fueling

OBD1 8-Bit Fuel Calculation Reference

Cars · Fueling

Volumetric Efficiency (VE)

Clamping Diode Installation and Selection

Cars · Honda / Civic / Eg / Wiring

02D011F0-1500

ECU 0-5V Wideband O2 Input Modification

Calibration Window Overview

MAP Sensor Parameters

Parameters Window Overview

Cars · Fueling

Closed-Loop Fuel Control

Cars · Ignition

Knock Control Tuning

Cars · Reference

Engine Compression Ratio Fundamentals

Cars · Reference

Honda ECU Central Processing Unit (CPU) Overview

OBD0 CN3 Serial Port Reference

Cars · Reference

NEC 2SD1780 Transistor Specifications

OBD0 Automatic ECU to Manual Conversion

Cars · Reference

Detonation Resonant Frequency Calculation

Cars · Reference

Honda ECU Hardware Analysis: G-Spot Reference

OBD1 8-Bit Low-Cam RPM Scaling

Cars · Reference

Little Endian Memory Format

OBD1 ECU: Auto to Manual Conversion

Cars · Reference

Octal Numbering System

OBD1 ECU Code Compatibility Guide

Cars · Reference

Australian Domestic Market (OzDM) Vehicle Specifications

OBD1 ECU ROM Conversion Formulas

OBD1 Oki 66207 Reader (DIP64)

Cars · Reference

Honda PCF ECU Hardware Reference

OBD1 Oki 66207 Reader (PLCC68)

Cars · Reference

Honda PCN ECU Hardware Reference

OBD1 CN2 Serial Port Reference

OBD1 ECU J12 Jumper Reference

Cars · Reference

Random Access Memory (RAM) in Honda ECUs

Cars · Reference

Wide Open Throttle (WOT) Definition and Tuning Significance

Cars · Sensors

Oki 66207 MCU Technical Reference

P05 OBD1 ECU Reference

P07 OBD1 ECU Reference (Civic VX)

Cars · Sensors

A143 Transistor Specifications and Replacements

P08 OBD1 ECU Reference

Cars · Sensors

Understanding Absolute Vacuum in Automotive Sensors

Cars · Sensors

Adding IAB Control to an OBD1 P28 ECU

Printed Circuit Boards (PCB)

Cars · Sensors

8051 and Oki 66k Carry Bit (C) Reference

Cars · Sensors

C144 NPN Switching Transistor

Cars · Sensors

C2785 NPN Switching Transistor

Resistor Box Installation Guide

Cars · Sensors

Honda ECU Clock Speed Reference

ROM Map Index

Cars · Sensors

DigiKey Electronic Component Sourcing

Real-Time Programming (RTP) Project

Cars · Sensors

Disabling the VTEC Vehicle Speed Sensor (VSS) Check

PGMFI SourceForge Repository

Spark Plug Technical Reference

Cars · Sensors

Honda Distributor Operation and Function

Throttle Position Sensor (TPS) Adjustment

Cars · Sensors

DIY Technical Philosophy

USB-to-Serial TTL Adapters (`FTDI` / USBMOD3)

Cars · Sensors

Dual Overhead Camshaft (DOHC) Engine Architecture

Engine Wiring Harness Reference

Cars · Sensors

Engine Coolant Temperature (ECT) Sensor Reference

Cars · Sensors

Honda ECU Sensors

Cars · Sensors

Electrical Load Detector (ELD) Operation

Cars · Sensors

Electronic Spark Advance Systems

Cars · Sensors

Electronic Advance Distributors

Cars · Sensors

Electronic Air Control Valve (EACV) Operation

Cars · Sensors

Honda ECU Engine Simulator Bench Testing

Cars · Sensors

UberData Engine Management (ERM) System

Cars · Sensors

Fuel Octane Ratings and Engine Performance

Cars · Sensors

Future Active Electronic Components Distributor

Cars · Sensors

Honda and Acura Factory Service Manuals

Cars · Sensors

VTEC High Cam Profile

Cars · Sensors

Intake Air Temperature (IAT) Sensor Reference

Cars · Sensors

Idle Air Control Valve (IACV) Operation and Diagnostics

Cars · Sensors

Intake Air Temperature (IAT) Sensor Specifications

Cars · Sensors

Honda ECU Input/Output (I/O) Architecture

Cars · Sensors

JDM OBD1 ECU Hardware Reference

Cars · Sensors

Honda OBD1 ECU Knock Sensor Daughterboard

Cars · Sensors

Modern Knock Detection Strategies for Honda ECUs

Cars · Sensors

Knock Sensor Voltages

Cars · Sensors

OBD1 ECU Address Latch Reference

Cars · Sensors

VTEC Low Cam Profile

Cars · Sensors

MAX233 TTL to RS232 Level Translator

Cars · Sensors

Multi Port Fuel Injection (MPFI) Overview

Cars · Sensors

Digital Multimeter Fundamentals

Cars · Sensors

OBD0 and OBD1 VTEC RPM Calculation Formula

Cars · Sensors

OBD1 16-bit RPM Calculation Reference

Cars · Sensors

OBD1 8-Bit Ignition Advance Calculation

Cars · Sensors

OBD1 8-bit High Cam RPM Conversion

Cars · Sensors

OBD1 8-bit TPS Scaling Reference

Cars · Sensors

OBD1 Civic and Integra ECU Reference

Cars · Sensors

P04 ECU Technical Reference

Cars · Sensors

P06 ECU Technical Reference

Cars · Sensors

OBD1 Honda P28 ECU Reference Guide

Cars · Sensors

P28-G03 ECU Technical Reference

Cars · Sensors

P29 OBD1 ECU Technical Reference

Cars · Sensors

OBD1 Honda P30 ECU Reference Guide

Cars · Diagnostics

Honda 6260A ECU Diagnostic LED Routine

Cars · Sensors

P70 OBD1 ECU Technical Reference

Cars · Diagnostics

Oki 8XC154 A5h Opcode Analysis

Cars · Diagnostics

Understanding Absolute Pressure in ECU Tuning

Cars · Diagnostics

AC Cut Routine

Cars · Diagnostics

ECU Boost Table Expansion

Cars · Sensors

P84 OBD1 ECU Specifications

Cars · Diagnostics

Adding Knock Sensor Circuitry to OBD1 ECUs

Cars · Diagnostics

Application Programming Interface (API) Reference

Cars · Diagnostics

ASM662 Assembler and Disassembler

Cars · Diagnostics

Auto Or Manual

Cars · Diagnostics

Batronix USB Programmer Technical Guide

Cars · Sensors

Honda PR3 ECU Reference Guide

Cars · Diagnostics

ECU ROM Checksum Calculation and Verification

Cars · Diagnostics

Troubleshooting Honda ECU Datalogging (CN2 Debugging)

Cars · Diagnostics

Diagnostic Trouble Code (DTC) Retrieval and Reference

Cars · Diagnostics

Disabling VTEC VSS Check on P30 ROMs

Cars · Diagnostics

Honda ECU Backup Processor Reference

Cars · Sensors

Pulse Width Modulation (PWM)

Cars · Sensors

OBD0 Honda PW0 ECU Reference Guide

Cars · Diagnostics

Honda OBD0 and OBD1 ECU Troubleshooting

Cars · Sensors

PW1 ECU Technical Reference

Cars · Diagnostics

EEPROM Technical Overview

Cars · Sensors

Pulse Width Modulation (PWM) in Honda ECUs

Cars · Sensors

Real-Time Programmable ECU Boards

Cars · Diagnostics

Full Throttle Shift Implementation for OBD1 ECUs

Cars · Diagnostics

EFI Theory and Engine Management Reference

Cars · Sensors

Honda ECU Rev Limiter Operation

Cars · Diagnostics

Intel HEX File Format Overview

Cars · Sensors

Revolutions Per Minute (RPM) Signal

Cars · Diagnostics

Hondata ECU Tuning Systems

Cars · Sensors

Engine Revolutions Per Minute (RPM) Signal

Cars · Sensors

RS232 Serial Communication Protocol

Cars · Diagnostics

Honda Fuel Injector Test Circuit

Cars · Sensors

Technical Documentation and Resource Guidelines

Cars · Diagnostics

Joel Eck

Cars · Sensors

Real Time Programmability (RTP)

Cars · Diagnostics

Honda OBD1 ECU Label Identification

Cars · Sensors

Saturated (High Impedance) Fuel Injectors

Cars · Sensors

ECU Memory Sector Architecture

Cars · Sensors

Factory Service Manuals (Helms)

Cars · Diagnostics

Using Nico Analyze for ECU ROM Map Identification

Cars · Sensors

Single Overhead Cam (SOHC) Engine Architecture

Cars · Sensors

Spark Advance Fundamentals

Cars · Sensors

Spark Cut Ignition Strategies

Cars · Sensors

Static RAM (SRAM) Technical Overview

Cars · Sensors

Steve Wainstead Technical Contributions

Cars · Sensors

Super Chips Automotive Tuning Overview

Cars · Diagnostics

OBD0 MPFI ECU Architecture

Cars · Sensors

Top Dead Center (TDC)

Cars · Sensors

Top Dead Center (TDC) Sensor Technical Reference

Cars · Diagnostics

OBD1 ECU Hardware Overview and Compatibility

Cars · Sensors

Transistor-Transistor Logic (TTL) Reference

Cars · Sensors

Engine Tuning Concepts and Reference

Cars · Diagnostics

OBD1 P72 ECU Debug Mode and ROM Configuration Switches

Cars · Sensors

USDM OBD1 ECU Specifications

Cars · Sensors

Vacuum Advance Ignition Systems

Cars · Sensors

Vehicle Speed Sensor (VSS) Technical Reference

Cars · Sensors

VTEC System Overview

Cars · Diagnostics

Popol Vuh: Foundational ECU Documentation

Cars · Diagnostics

Pre-Ignition and Detonation (Engine Knock)

Basic Concepts of Honda Engine Management

Cars · Diagnostics

DIY Engine Simulator for ECU Bench Testing

Cars · Diagnostics

Honda ECU Speed Limiter Operation

Cars · Diagnostics

Xeltek SuperProZ EPROM Programmer Technical Overview

Cars · Diagnostics

Throttle Position Sensor (TPS)

Cars · Diagnostics

Removing MAP Sensor Software Limits (Uncorking)

Data Link Connector (DLC) Communication Protocols

27C256 EPROM Specifications

DIY Dual-ROM Setup (27C512 Jumper Switch)

28C256 EEPROM Pinout and ECU Compatibility

Honda ECU Identification and Compatibility FAQ

EETools ChipMax Device Programmer

Exhaust Gas Temperature (EGT) Sensor Overview

OBD1 Large-Case ECU Chipping Guide

Logging an External 0-5 V Sensor via P30 D12

Using and Modifying Bulb-Style Desoldering Irons

Desoldering Tips & Best Practices

JDM P30 D12 Analog-Input Modification

Desoldering Tools for ECU Modification

OBD1 Honda ECU Architecture and Memory Mapping

Honda PGM-FI Engine Control Unit (ECU) Identification

ECU Control Software Overview

ECU Definition Codes

Honda ECU Families & Generations

EPROMer5 Device Programmer Technical Guide

EPROMer5 Parallel-Port EPROM Programmer

Honda Distributor Ignitor Replacement for Aftermarket Ignition

Soldering Guide for ECU Modifications

Proposed Datalogging & RTP Protocol

Guide to EPROM and Flash ROM Burners

Soldering Iron Selection and Usage Guidelines

Locking Pliers (Vise-Grips) for Automotive Hardware

Cars · Fueling

High Impedance Injectors

Atmel AT29C010 Flash ROM

Cars · Fueling

Fuel Injector Sizing and Selection

5050s VTEC Conversion Fix

Cars · Fueling

Low Impedance Injectors

A/C Thermostat Switch Bypass

Cars · Fueling

Manifold Absolute Pressure (MAP) Sensor

Analog-to-Digital Conversion (ADC)

Cars · Fueling

Oxygen (O2) Sensor Technical Reference

Adding a Knock Sensor to a Honda ECU

Cars · Fueling

Tuning Honda ECUs for Smog and Emissions Inspections

Atmospheric Pressure

Cars · Fueling

Understanding ECU Fuel and Ignition Maps

BAR (Unit of Pressure)

Calendar Plugin

Check Engine Light (CEL)

Combustion Chamber

ECU Conversion Overview

D16Z6 Swap Guide: OBD0 Chassis

Cars · Honda / Civic / Eg / Sensors

Disabling Cruise Control and Upshift Indicator Lights on P05 ECUs

Desoldering Braid

OBD1 ECU Chipping Wirelist

Cars · Honda / Civic / Eg / Wiring

Enabling O2 Sensor Heater Circuitry on OBD1 ECUs

How ECU Datalogging Works

Wideband O2 Sensor Installation Guide

Honda OBD0 to OBD1 Wiring Conversion Guide

Mass Air Flow (MAF) Sensor

MCU Readers and ROM Dumping

Cars · Ignition

Crankshaft Position (CKP) Sensor Operation

DIY Datalogging Cable (Nokia FBUS Modification)

Non-VTEC to VTEC ECU Conversion

NVSRAM Technical Reference

Cars · Ignition

Knock Sensor Operation and Diagnostics

Oxygen (O2) Sensor Heater Circuit

Cars · Ignition

Tuning Ignition Timing on Honda ECUs

Honda OBD Generations Guide (OBD0 to OBD2)

Cars · Reference

Camshaft Profile Fundamentals