Hondabase

Cars · Sensors

Like Pages Reference

Cars · Diagnostics

OBD1 P72 ECU Debug Mode and ROM Configuration Switches

Cars · Sensors

VTEC Low Cam Profile

Cars · Sensors

MAX233 TTL to RS232 Level Translator

Cars · Diagnostics

PK2

Cars · Sensors

Multi Port Fuel Injection (MPFI) Overview

Cars · Sensors

Digital Multimeter Fundamentals

Cars · Diagnostics

Popol Vuh: Foundational ECU Documentation

Cars · Diagnostics

Pre-Ignition and Detonation (Engine Knock)

Cars · Diagnostics

Real-Time Programming (RTP) for Honda ECUs

Cars · Sensors

OBD0 and OBD1 VTEC RPM Calculation Formula

Cars · Diagnostics

DIY Engine Simulator for ECU Bench Testing

Cars · Sensors

OBD1 16-bit RPM Calculation Reference

Cars · Diagnostics

Speed Density

Cars · Sensors

OBD1 8-Bit Ignition Advance Calculation

Cars · Diagnostics

Honda ECU Speed Limiter Operation

Cars · Sensors

OBD1 8-bit High Cam RPM Conversion

Cars · Diagnostics

Xeltek SuperProZ EPROM Programmer Technical Overview

Cars · Sensors

OBD1 8-bit TPS Scaling Reference

Cars · Diagnostics

Throttle Plate Operation and Function

Cars · Sensors

OBD1 Civic and Integra ECU Reference

Cars · Diagnostics

Throttle Position Sensor (TPS)

Cars · Sensors

Orphaned Pages Documentation

Cars · Diagnostics

Troubleshooting a Solid CEL

Cars · Diagnostics

Removing MAP Sensor Software Limits (Uncorking)

Cars · Ecu

27C256 EPROM Specifications

Cars · Ecu

28C256 EEPROM Pinout and ECU Compatibility

Cars · Sensors

OBD1 Honda P28 ECU Reference Guide

Cars · Ecu

Honda ECU Identification and Compatibility FAQ

Cars · Sensors

OBD1 Honda P30 ECU Reference Guide

Cars · Ecu

OBD1 Large-Case ECU Chipping Guide

Cars · Ecu

Using and Modifying Bulb-Style Desoldering Irons

Cars · Ecu

Desoldering Tips & Best Practices

Cars · Ecu

Desoldering Tools for ECU Modification

Cars · Ecu

OBD1 Honda ECU Architecture and Memory Mapping

Cars · Ecu

Honda PGM-FI Engine Control Unit (ECU) Identification

Cars · Sensors

OBD1 Honda P72 ECU Reference Guide

Cars · Ecu

ECU Control Software Overview

Cars · Sensors

P73 OBD2 ECU Reference (1996–2000 Integra Type-R)

Cars · Ecu

ECU Definition Codes

Cars · Sensors

P74/P75 OBD1 ECU Reference

Cars · Ecu

Honda ECU Families & Generations

Cars · Sensors

P75 ECU Technical Reference

Cars · Ecu

EPROMer5 Device Programmer Technical Guide

Cars · Ecu

EPROMer5 Parallel-Port EPROM Programmer

Cars · Ecu

Honda Distributor Ignitor Replacement for Aftermarket Ignition

Cars · Sensors

Atmospheric Pressure (PA) Sensor Technical Reference

Cars · Ecu

Soldering Guide for ECU Modifications

Cars · Ecu

OBD1 PR4 ECU Hardware Reference

Cars · Sensors

Honda PR3 ECU Reference Guide

Cars · Sensors

PR4 ECU Technical Reference

Cars · Ecu

Soldering Iron Selection and Usage Guidelines

Cars · Sensors

Pulse Width Modulation (PWM)

Cars · Ecu

Locking Pliers (Vise-Grips) for Automotive Hardware

Cars · Sensors

OBD0 Honda PW0 ECU Reference Guide

Cars · Sensors

Pulse Width Modulation (PWM) in Honda ECUs

Cars · Sensors

Electronic Component Sourcing for ECU Repair

Cars · Fueling

High Impedance Injectors

Cars · Sensors

Real-Time Programmable ECU Boards

Cars · Sensors

Real Time Programming (RTP) Hardware

Cars · Fueling

Fuel Injector Sizing and Selection

Cars · Sensors

Project Contributors and History

Cars · Fueling

Low Impedance Injectors

Cars · Sensors

Honda ECU Rev Limiter Operation

Cars · Fueling

Manifold Absolute Pressure (MAP) Sensor

Cars · Sensors

Revolutions Per Minute (RPM) Signal

Cars · Sensors

Engine Revolutions Per Minute (RPM) Signal

Cars · Fueling

Tuning Honda ECUs for Smog and Emissions Inspections

Cars · Sensors

RS232 Serial Communication Protocol

Cars · Fueling

Understanding ECU Fuel and Ignition Maps

Cars · Sensors

Technical Documentation and Resource Guidelines

Cars · Sensors

Real Time Programmability (RTP)

Cars · Sensors

Saturated (High Impedance) Fuel Injectors

Cars · Sensors

ECU Memory Sector Architecture

Cars · Sensors

Factory Service Manuals (Helms)

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 · Ignition

Crankshaft Position (CKP) Sensor Operation

Cars · Sensors

Super Chips Automotive Tuning Overview

Cars · Sensors

Top Dead Center (TDC)

Cars · Ignition

Knock Sensor Operation and Diagnostics

Cars · Sensors

Transistor-Transistor Logic (TTL) Reference

Cars · Ignition

Tuning Ignition Timing on Honda ECUs

Cars · Sensors

Engine Tuning Concepts and Reference

Cars · Sensors

UberData Tuning Software Overview

Cars · Reference

Camshaft Profile Fundamentals

Cars · Sensors

NEC uPD7004C Analog-to-Digital Converter

Cars · Reference

Engine Compression Ratio Fundamentals

Cars · Sensors

USDM OBD1 ECU Specifications

Cars · Reference

Honda ECU Central Processing Unit (CPU) Overview

Cars · Sensors

Vacuum Advance Ignition Systems

Cars · Reference

NEC 2SD1780 Transistor Specifications

Cars · Sensors

Vehicle Speed Sensor (VSS) Technical Reference

Cars · Reference

Detonation Resonant Frequency Calculation

Cars · Sensors

VTEC System Overview

Cars · Reference

Honda ECU Hardware Analysis: G-Spot Reference

Cars · Reference

Little Endian Memory Format

Cars · Tuning

Basic Concepts of Honda Engine Management

Cars · Reference

Most Popular Technical Resources

Cars · Reference

Octal Numbering System

Cars · Tuning

Data Link Connector (DLC) Communication Protocols

Cars · Reference

Australian Domestic Market (OzDM) Vehicle Specifications

Cars · Tuning

DIY Dual-ROM Setup (27C512 Jumper Switch)

Cars · Tuning

Exhaust Gas Temperature (EGT) Sensor Overview

Cars · Reference

Honda PCF ECU Hardware Reference

Cars · Reference

Honda PCN ECU Hardware Reference

Cars · Reference

Random Access Memory (RAM) in Honda ECUs

Cars · Reference

Square Bracket Syntax and Usage

Cars · Reference

User Preferences Configuration

Cars · Tuning

Proposed Datalogging & RTP Protocol

Cars · Reference

Wide Open Throttle (WOT) Definition and Tuning Significance

Cars · Rom

SST27SF256 Flash Memory Reference

Cars · Rom

Oki 66K Processor Resources

Cars · Wiring

ECU Conversion Guide: 02D01980-1500 Board

Cars · Rom

74HC373 Octal Latch IC

Cars · Wiring

Atmel AT29C010 Flash ROM

Cars · Rom

Understanding ECU Binary (.bin) Files

Cars · Wiring

5050s VTEC Conversion Fix

Cars · Rom

Thread-Locking Compound Selection and Application

Cars · Wiring

A/C Thermostat Switch Bypass

Cars · Rom

Understanding Boost Pressure

Cars · Rom

Turbocharger Boost Controller Reference

Cars · Rom

Understanding Boost Cut

Cars · Wiring

Analog-to-Digital Conversion (ADC)

Cars · Rom

check8 8-Bit ROM Checksum Utility

Cars · Wiring

Adding a Knock Sensor to a Honda ECU

Cars · Wiring

Atmospheric Pressure

Cars · Wiring

Automatic to Manual ECU Conversion

Cars · Rom

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

Cars · Wiring

BAR (Unit of Pressure)

Cars · Rom

Chipping OBD2 Honda ECUs (OKI 66507 / 66P507)

Cars · Wiring

Calendar Plugin

Cars · Rom

Honda ECU Chipping Visual Reference Guide

Cars · Wiring

Check Engine Light (CEL)

Cars · Rom

Sourcing Memory Chips for Honda OBD0 and OBD1 ECUs

Cars · Wiring

Combustion Chamber

Cars · Rom

Clamping Diode Installation and Selection

Cars · Wiring

ECU Conversion Overview

Cars · Rom

Understanding the ECU Fuel Map Column Multiplier

Cars · Rom

Crome ROM Editor Overview

Cars · Wiring

Desoldering Braid

Cars · Rom

Crome JavaScript Scripting API

Cars · Rom

DAC

Cars · Rom

Understanding Dec At Addy

Cars · Wiring

Index of Honda ECU Connections & Pinouts

Cars · Rom

Dual-Map ROM Tuning for Honda ECUs

Cars · Wiring

How ECU Datalogging Works

Cars · Rom

Dual Runner Intake Manifold Operation

Cars · Wiring

Wideband O2 Sensor Installation Guide

Cars · Rom

Honda ECU Dual-Table ROM Structures

Cars · Wiring

Honda OBD0 to OBD1 Wiring Conversion Guide

Cars · Rom

EA (EA Prime) Pin Functionality

Cars · Wiring

Mass Air Flow (MAF) Sensor

Cars · Wiring

MCU Readers and ROM Dumping

Cars · Rom

DIY Easy-RTP v1.0 Build and Installation Guide

Cars · Wiring

DIY Datalogging Cable (Nokia FBUS Modification)

Cars · Rom

ECU Boost Control Implementation

Cars · Rom

Guide to Honda ECU Hardware Modifications

Cars · Wiring

NVSRAM Technical Reference

Cars · Rom

ECU Nitrous Control Implementation

Cars · Wiring

Oxygen (O2) Sensor Heater Circuit

Cars · Rom

Contributing to Hondabase Documentation

Cars · Wiring

Honda OBD Generations Guide (OBD0 to OBD2)

Cars · Rom

Electronic Boost Controller Fundamentals

Cars · Rom

Electronic Part Supplier Reference

Cars · Rom

Honda ECU Engine Simulator Reference

Cars · Wiring

OBD0 CN3 Serial Port Reference

Cars · Rom

Honda ECU EPROM Compatibility Reference

Cars · Wiring

OBD0 Automatic ECU to Manual Conversion

Cars · Rom

FLASH Memory Architecture

Cars · Wiring

Honda OBD1 ECU Reference (1992–1995)

Cars · Rom

Fuel Cut Operation and Theory

Cars · Wiring

OBD1 8-Bit Low-Cam RPM Scaling

Cars · Rom

Fuel Pressure Tuning and Specifications

Cars · Wiring

OBD1 ECU: Auto to Manual Conversion

Cars · Rom

Hondabase Full Recent Changes

Cars · Wiring

OBD1 ECU Code Compatibility Guide

Cars · Rom

Ghetto Dyne Tuning Platform

Cars · Wiring

OBD1 ECU ROM Conversion Formulas

Cars · Rom

Technical Documentation Style Standards

Cars · Wiring

OBD1 Oki 66207 Reader (DIP64)

Cars · Rom

Converting Intel HEX Files to Binary (BIN)

Cars · Wiring

OBD1 CN2 Serial Port Reference

Cars · Rom

High-Resolution (Hi-Res) P72 ROM Specifications

Cars · Wiring

OBD1 ECU J12 Jumper Reference

Cars · Rom

Ideal Gas Law in Speed-Density Tuning

Cars · Rom

Intel 8051 Development Reference

Cars · Wiring

OBD2 Oki66507 Reader Nico

Cars · Rom

Honda ECU Internal ROM Architecture

Cars · Rom

Introduction to ECU Chipping

Cars · Wiring

OBD2 P5M ECU Automatic to Manual Conversion

Cars · Rom

Java Script

Cars · Rom

Latch Logic and ECU Implementation

Cars · Rom

Honda ECU Launch Control (Two-Step) Implementation

Cars · Rom

Honda MAP Sensor Voltage Calibration Equations

Cars · Rom

Mass Air Flow (MAF) Systems

Cars · Rom

Honda ECU Microcontroller (MCU) Overview

Cars · Wiring

Printed Circuit Boards (PCB)

Cars · Rom

Multiprocessor Communication Protocols

Cars · Wiring

Peak and Hold (Low Impedance) Injectors

Cars · Rom

ECU 0-5V Wideband O2 Input Modification

Cars · Rom

OBD0 Engine Control Units (1988–1991)

Cars · Wiring

RM11 Resistor Network Replacement

Cars · Wiring

ROM Map Index

Cars · Rom

OBD1 8-Bit Fuel Calculation Reference

Cars · Wiring

Real-Time Programming (RTP) Project

Cars · Rom

OBD1 8-bit MAP Calibration in Millibars

Cars · Wiring

PGMFI SourceForge Repository

Cars · Wiring

Spark Plug Technical Reference

Cars · Rom

OBD1 ECU J1 Jumper Configuration

Cars · Wiring

Throttle Position Sensor (TPS) Adjustment

Cars · Rom

OBD2A

Cars · Wiring

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

Cars · Rom

OBD2K ECU Standard

Cars · Rom

One Time Programmable (OTP) EPROM

Cars · Wiring

VTEC Solenoid

Cars · Wiring

Engine Wiring Harness Reference

Cars · Rom

PGMFI Administrative Contributors

Cars · Rom

Piggyback Engine Management Controllers

Cars · Rom

Pocket Programmer 2 Technical Overview

Cars · Rom

Atmospheric Pressure (PA) Sensor Reference

Cars · Rom

Recent Technical Documentation Edits

Cars · Rom

Red Loctite Thread-Locking Compound

Cars · Rom

Understanding Relative Pressure in Engine Tuning

Cars · Rom

Read Only Memory (ROM) Architecture

Cars · Rom

ROM Editor Overview

Cars · Rom

ROM Emulator Technical Overview

Cars · Rom

Honda and Rover Technical Collaboration

Cars · Rom

USB-Based ECU Datalogging and Hardware Integration

Cars · Rom

Honda ECU Serial Communication Adapters

Cars · Rom

Throttle Body Overview

Cars · Rom

Turbocharger Fundamentals

Cars · Rom

Turbo Compressor Map

Cars · Rom

Uberdata and ERM Tuning Editors

Cars · Rom

UberData Tuning FAQ

Cars · Rom

Uber P72 ROM Map

Cars · Rom

UV EPROM Erasure Procedures

Cars · Rom

Volumetric Efficiency (VE)

Cars · Rom

VTEC Crossover Point Calibration

Cars · Rom

Technical Considerations for Retrofitting Knock Sensors

Cars · Rom

Turbocharger Wastegate Operation

Cars · Rom

Technical Limitations of Piggyback ECU Controllers

Cars · Diagnostics

Honda 6260A ECU Diagnostic LED Routine

Cars · Rom

WinHex Hexadecimal Editor for ECU Tuning

Cars · Rom

Zero Insertion Force (ZIF) Sockets for ECU Tuning

Cars · Sensors

Oki 66207 MCU Technical Reference

Cars · Sensors

Oki 66K Assembly Language Routines for Honda ECUs

Cars · Diagnostics

Oki 8XC154 A5h Opcode Analysis

Cars · Sensors

A143 Transistor Specifications and Replacements

Cars · Diagnostics

Understanding Absolute Pressure in ECU Tuning

Cars · Sensors

Understanding Absolute Vacuum in Automotive Sensors

Cars · Sensors

Adding IAB Control to an OBD1 P28 ECU

Cars · Diagnostics

ECU Boost Table Expansion

Cars · Diagnostics

Adding Knock Sensor Circuitry to OBD1 ECUs

Cars · Sensors

Back Links Functionality

Cars · Diagnostics

PR4 ECU Atmospheric Pressure (PA) Sensor Configuration

Cars · Sensors

8051 and Oki 66k Carry Bit (C) Reference

Cars · Diagnostics

Application Programming Interface (API) Reference

Cars · Sensors

C144 NPN Switching Transistor

Cars · Diagnostics

ASM662 Assembler and Disassembler

Cars · Sensors

C2785 NPN Switching Transistor

Cars · Diagnostics

Auto Or Manual

Cars · Sensors

Chipping OBD1 Small-Case ECUs

Cars · Diagnostics

Batronix USB Programmer Technical Guide

Cars · Sensors

Honda ECU Clock Speed Reference

Cars · Diagnostics

ECU ROM Checksum Calculation and Verification

Cars · Sensors

DigiKey Electronic Component Sourcing

Cars · Sensors

Disabling the VTEC Vehicle Speed Sensor (VSS) Check

Cars · Diagnostics

Troubleshooting Honda ECU Datalogging (CN2 Debugging)

Cars · Sensors

Disabling VTEC VSS Check on P72 ECU

Cars · Diagnostics

Diagnostic Trouble Code (DTC) Retrieval and Reference

Cars · Sensors

Honda Distributor Operation and Function

Cars · Sensors

DIY Technical Philosophy

Cars · Diagnostics

Honda ECU Backup Processor Reference

Cars · Sensors

Dual Overhead Camshaft (DOHC) Engine Architecture

Cars · Diagnostics

Honda OBD0 and OBD1 ECU Troubleshooting

Cars · Diagnostics

EEPROM Technical Overview

Cars · Sensors

Engine Coolant Temperature (ECT) Sensor Reference

Cars · Sensors

Honda ECU Sensors

Cars · Diagnostics

Full Throttle Shift Implementation for OBD1 ECUs

Cars · Sensors

Electrical Load Detector (ELD) Operation

Cars · Diagnostics

EFI Theory and Engine Management Reference

Cars · Sensors

Electronic Spark Advance Systems

Cars · Diagnostics

Intel HEX File Format Overview

Cars · Sensors

Electronic Advance Distributors

Cars · Diagnostics

Hondata ECU Tuning Systems

Cars · Sensors

Electronic Air Control Valve (EACV) Operation

Cars · Diagnostics

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

Cars · Sensors

Honda ECU Engine Simulator Bench Testing

Cars · Diagnostics

Honda Fuel Injector Test Circuit

Cars · Sensors

UberData Engine Management (ERM) System

Cars · Diagnostics

Joel Eck

Cars · Sensors

Fuel Octane Ratings and Engine Performance

Cars · Sensors

Future Active Electronic Components Distributor

Cars · Diagnostics

Link Icons for Documentation

Cars · Sensors

VTEC High Cam Profile

Cars · Sensors

Intake Air Temperature (IAT) Sensor Reference

Cars · Diagnostics

OBD0 Code Compatibility

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 · Diagnostics

OBD0 MPFI ECU Architecture

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

Honda ECU Modification Historical Archive

Cars · Fueling

Closed-Loop Fuel Control

Cars · Ignition

Knock Control Tuning

Cars · Tuning

Calibration Window Overview

Cars · Tuning

MAP Sensor Parameters

Cars · Tuning

Parameters Window Overview