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Engine Controls - Tests W/codes - 4.9l Ford Pickup F250

Step-by-step instructions on "Engine Controls - Tests W/codes - 4.9l" for Ford Pickup F250 (1985–2000). Pick an article — removal, installation, adjustment and diagnostics with illustrations.

INTRODUCTION

SELF-DIAGNOSTIC SYSTEM

DIAGNOSTIC FORMATS

DIAGNOSTIC TROUBLE 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

Failure Mode Effects Management (FMEM), Code 98 Or 998

Hardware Limited Operational Strategy (HLOS)

Cylinder Balance Test

SUMMARY

DIAGNOSTIC TROUBLE CODE (DTC) DEFINITION (BRONCO, PICKUP & VAN 4.9L)

CIRCUIT TESTS

HOW TO USE CIRCUIT TESTS

CIRCUIT TEST AA - NO START (TFI IGNITION SYSTEMS)

CIRCUIT TEST H - FUEL CONTROL

CIRCUIT TEST HA - ADAPTIVE FUEL

Engine Starts

No Start