Diagnostic Starting Point - Instrument Cluster

Begin the system diagnosis with A Diagnostic System Check - Instrument Cluster or A Diagnostic System Check - Audible Warnings. The Diagnostic System Check will provide the following information:
^ The identification of the control module(s) which command the system.
^ The ability of the control module(s) to communicate through the serial data circuit.
^ The identification of any stored diagnostic trouble codes (DTCs) and their status.

The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.

Scan Tool Diagnostics
Refer to the Tech 2 Users Manual.

Scan Tool Output Controls
Use the scan tool in order to cycle the instrument cluster indicators or Messages On or OFF. The gauges can be swept and the PRNDL display positions can be commanded ON. The following tests are available under the Special Functions selection:

Lamp Test
The following indicators or Messages can be commanded ON or OFF.
^ ABS Lamp
^ Air Bag Lamp
^ Brake Lamp
^ Cargo Door Ajar
^ Cargo Lamp ON
^ Change Oil
^ Check Eng Oil Level
^ Check Eng Oil Pressure
^ Check Coolant Temp
^ Cruise Control Lamp
^ Engine Hot
^ Engine Overheated
^ High Beam Lamp
^ Low Fuel
^ Low Washer Fluid
^ Low Coolant
^ Oil Pressure Lamp
^ Overspeed
^ Service 4WD
^ 4WD Indicator
^ Reduce Engine Power
^ Seat Belt Lamp
^ Security
^ Service Ride Control
^ Service Throttle Soon
^ Tow/Haul
^ Trans. Fluid Hot
^ Trans... Hot Idle Engine
^ Upshift Lamp
^ Volts Lamp
^ Water in Fuel

IPC Gauges
The following gauges can be swept:
^ Coolant Gauge Sweep Test
^ Fuel Gauge Sweep Test
^ Speed Gauge Sweep Test
^ Tach Gauge Sweep Test
^ Trans Oil Temp Gauge Sweep Test

PRNDL Display
The following PRNDL displays can be commanded ON:
^ Park
^ Reverse
^ Neutral
^ Drive
^ 3rd
^ 2nd
^ 1st

Scan Tool Data List
Refer to the below data tables when one of the following conditions exist:
^ The Instrument Cluster Diagnostic System Check is complete.
^ The on board diagnostics are operating correctly.
^ No diagnostic trouble codes (DTCs) are displayed.

The typical scan tool data values are an average of the displayed values recorded from normally operating vehicles. The typical scan tool data values are intended to represent what a normally functioning system would display with certain preliminary settings.

The values you get may vary slightly due to a low battery charge or other reasons. But the values should be very close.

Use only the parameters listed in the tables for diagnosis. If a scan tool reads other parameters, the values are not recommended for use in diagnosis. Refer to the Scan tool data definitions for further detailed information.

Typical Scan Tool Data Display
Preliminary Settings: The following preliminary settings must be set in order to achieve the same typical data values listed in the table.