Isuzu 4JH1 - User Manual

WORKSHOP MANUAL
2011MY TF SERIES
ENGINE
4JA1/4JH1 MODELS
SECTION 6
Isuzu Motors Limited
E-Solutions &
Service Marketing Dept.

Summary

SECTION 6 TROUBLESHOOTING

1. HARD STARTING

Steps to diagnose when the engine is hard to start.

3. INSUFFICIENT POWER

Diagnosis and repair for insufficient engine power.

6. OVERHEATING

Steps to diagnose and resolve engine overheating issues.

15. STARTER MOTOR PROBLEM

Troubleshooting starter motor issues.

SECTION 6 A ENGINE MECHANICAL

Torque Specification

Inspection and Repair

SECTION 6 B ENGINE COOLING

Diagnosis

Troubleshooting guide for engine cooling system problems.

SECTION 6 C FUEL SYSTEM

INJECTION PUMP

SECTION 6 D ENGINE ELECTRICAL

SECTION 6 E ENGINE CONTROL SYSTEM (4 JH1)

Diagnostic Information And Procedures

General procedures for diagnosing engine control system issues.

Diagnostic Trouble Code (DTC) List

List of Diagnostic Trouble Codes with symptom and flash codes.

SECTION 6 F EXHAUST SYSTEM

INSPECTION AND REPAIR

Turbocharger

SECTION 6 H ACCELERATOR CONTROL

Isuzu 4JH1 Specifications