2003 Jeep Wrangler SUV service manual

Table of Contents

1.0 INTRODUCTION

• System Coverage
• Six-Step Trouble Shooting Procedure

2.0 IDENTIFICATION OF SYSTEM

3.0 SYSTEM DESCRIPTION AND FUNCTIONAL OPERATION

• General Description
• Function Operation
  • Fuel Control (Gas)
  • On-Board Diagnostics
  • Other Controls
  • Non-Monitored Circuits
  • SKIS Overview
  • SKIM On-Board Diagnostics
  • SKIS Operation
  • Programming the Powertrain Control Module
  • Programming the Sentry Key Immobilizer Module
  • Programming the Ignition Keys to the Sentry Key Immobilizer Module
• Diagnostic Trouble Codes
  • Hard Code
  • Intermittent Code
  • Starts Since Set Counter
  • No Start Information
• Using the DRBIII®
  • DRBIII® Error Messages and Blank Screen
  • DRBIII® Does Not Power Up
  • Display Is Not Visible

4.0 DISCLAIMERS, SAFETY, WARNINGS

• Disclaimers
• Safety
  • Technician Safety Information
  • Vehicle Preparation for Testing
  • Servicing Sub-Assemblies
  • DRBIII® Safety Information
• Warnings and Cautions
  • Road Test Warnings
  • Vehicle Damage Cautions

5.0 REQUIRED TOOLS AND EQUIPMENT

6.0 ACRONYMS

7.0 DIAGNOSTIC INFORMATION AND PROCEDURES

• Communication
  • No Response from PCM (PCI Bus)
  • No Response from PCM (SCI Only)
  • PCI Bus Communication Failure
• Driveability - Gas
  • Intermittent Condition
  • Diagnostic Trouble Codes (P0031 - P0360)
  • Driveability Concerns
• Starting
  • Checking Fuel Delivery
  • Checking Hard Start (Fuel Delivery System)
  • Engine Cranks Does Not Start
  • Fuel Pressure Leak Down
  • No Crank Condition
  • No Response from PCM with a No Start Condition
  • Start and Stall Condition

8.0 COMPONENT LOCATIONS

• Control Modules and PDC
• Data Link Connector
• Sensors and Solenoids
• Fuel System
• Switches

9.0 CONNECTOR PINOUTS

• A/C Compressor Clutch
• A/C High Pressure Switch (4.0L)
• A/C Low Pressure Switch (2.4L)
• A/C Low Pressure Switch (4.0L)
• A/C Pressure Transducer (2.4L)
• Battery Temperature Sensor
• Brake Lamp Switch
• Brake Transmission Shift Interlock Solenoid
• C120 (2.4L)
• C180
• Camshaft Position Sensor (4.0L)
• Clockspring C1
• Clutch Pedal Position Switch (M/T)
• Crankshaft Position Sensor (2.4L/4.0L A/T)
• Crankshaft Position Sensor (4.0L M/T)
• Data Link Connector
• Engine Coolant Temperature Sensor
• Engine Oil Pressure Switch
• EVAP/Purge Solenoid
• Fuel Injector No. 1 (2.4L/4.0L)
• Fuel Injector No. 2 (2.4L/4.0L)
• Fuel Injector No. 3 (2.4L/4.0L)
• Fuel Injector No. 4 (2.4L/4.0L)
• Fuel Injector No. 5 (4.0L)
• Fuel Injector No. 6 (4.0L)
• Fuel Pump Module (A/T)
• Fuel Pump Module (M/T)
• Fuses (Fuse/Relay Block)
• Generator
• Idle Air Control Motor
• Ignition Coil Pack (2.4L)
• Ignition Coil Pack (4.0L)
• Intake Air Temperature Sensor
• Leak Detection Pump
• Manifold Absolute Pressure Sensor (4.0L)
• Overdrive Off Switch
• Oxygen Sensor 1/1 Upstream
• Oxygen Sensor 1/2 Downstream
• Oxygen Sensor 2/1 Upstream (Except Export/Japan Low Emission Vehicle)
• Oxygen Sensor 2/2 Downstream (Except Export/Japan Low Emission Vehicle)
• Fuses (PDC)
• A/C Clutch Relay
• Automatic Shut Down Relay
• Engine Starter Motor Relay
• Oxygen Sensor Downstream Heater Relay
• Power Steering Pressure Switch (2.4L)
• Powertrain Control Module C1
• Powertrain Control Module C2
• Powertrain Control Module C3
• Radiator Fan Motor (2.4L)
• Radiator Fan Motor Circuit Breaker (2.4L)
• Radiator Fan Motor Relay (2.4L)
• Sentry Key Immobilizer Module
• Speed Control Servo
• Throttle Position Sensor (4.0L)
• Vehicle Speed Sensor

10.0 SCHEMATIC DIAGRAMS

11.0 CHARTS AND GRAPHS

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