Isuzu - 4JH1-TC ENGINE - Engine Management System Operation & Diagnosis

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CONTENTS


INTRODUCTION & OUTLINE Page
GENERAL INFORMATION
CHARACTERISTIC OF VP44 INJECTION PUMP
ENGINE CONTROL MODULE
BREAKER BOX
SPS (SERVICE PROGRAMMING SYSTEM)
DATA EXCHANGE BETWEEN CONTROL MODULE
PRINCIPLE OF FUEL QUANTITY METERING & INJECTION TIMING
ECM WIRING SCHEME
ECM CONNECTOR PIN ASSIGNMENT
PSG CONNECTOR PIN ASSIGNMENT
ELECTRICAL COMPONENTS
MASS AIR FLOW (MAF) SENSOR & INTAKE AIR TEMPERATURE (IAT) SENSOR
ENGINE COOLANT TEMPERATURE (ECT) SENSOR
CRANKSHAFT POSITION (CKP) SENSOR
PEDAL/THROTTLE POSITION SENSOR (TPS)
VEHICLE SPEED SENSOR (VSS)
EGR (EXHAUST GAS RE-CIRCULATION) ------------------------------------------------------- 33
QUICK ON SYSTEM 2 (QOS 2) ---------------------------------------------------------------------- 36
STRATEGY BASED DIAGNOSTIC
STRATEGY BASED DIAGNOSTIC CHART
OVERVIEW
DIAGNOSTIC THOUGHT PROCESS
DIAGNOSIS WITH TECH 2
IF NO CODES ARE SET
IF CODES ARE SET
TECH 2 CONNECTION
TECH 2 OPERATING FLOW CHART (START UP)
TYPICAL SCAN DATA & DEFINITIONS
SNAPSHOT ANALYSIS
SNAPSHOT DISPLAY WITH TIS2000
DIAGNOSTIC TROUBLE CODE
CONTENTS
SYMPTOM DIAGNOSIS
PRELIMINARY CHECKS
VISUAL/PHYSICAL CHECK
INTERMITTENT
FAULTY SYMPTOM & DEFINITION
ECM CIRCUIT DIAGRAM
WITH ABS (1/2)
WITH ABS (2/2)
WITHOUT ABS (1/2)
WITHOUT ABS (2/2)
PARTS LOCATION (LHD)
PARTS LOCATION (RHD)
GROUND LOCATION
RELAY & FUSIBLE LINK LOCATION
RELAY & FUSE LOCATION
SPECIAL TOOLS -------------------------------------------------------------------------------------
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