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Engine Controls - Tests W/codes - 4.0l Ford Explorer I

Step-by-step instructions on "Engine Controls - Tests W/codes - 4.0l" for Ford Explorer I (1990–1994). Pick an article — removal, installation, adjustment and diagnostics with illustrations.

INTRODUCTION

SELF-DIAGNOSTIC SYSTEM

DIAGNOSTIC FORMATS

SERVICE CODES

KOEO & KOER CODES (HARD FAULTS)

CONTINUOUS MEMORY CODES (SOFT FAULTS)

RETRIEVING CODES

KOEO & KOER SELF-TEST CODES

SEPARATOR CODE

PASS CODES

CONTINUOUS MEMORY CODES

FAST CODES

CLEARING CODES

Description

Diagnostic Aids

VISUAL CHECK & EQUIPMENT HOOKUP

Analog Volt-Ohmmeter (VOM)

Scan Tester

STAR Series Tester

KOEO SELF-TEST

COMPUTED TIMING CHECK

CONTINUOUS MONITOR MODE (WIGGLE TEST)

KOEO Wiggle Test

KOER Wiggle Test

ADDITIONAL SYSTEM FUNCTIONS

Check Engine Light & Malfunction Indicator Light (MIL)

Output State Check

Hardware Limited Operational Strategy (HLOS)

Cylinder Balance Test

SUMMARY

DIAGNOSTIC TROUBLE CODE (DTC) DEFINITION (AEROSTAR, EXPLORER & RANGER 4.0L)

CIRCUIT TESTS

HOW TO USE CIRCUIT TESTS

CIRCUIT TEST AC - NO START (EDIS IGNITION SYSTEMS)

Preliminary Instructions (A/T)

Preliminary Instructions (M/T)

CIRCUIT TEST H - FUEL CONTROL

CIRCUIT TEST HA - ADAPTIVE FUEL