Inspection and Verification
Instrumentation, Message Center and Warning Chimes
Inspection and Verification
1. Verify the customer concern.
2. Visually inspect for obvious signs of mechanical or electrical damage.
Visual Inspection Chart
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
4. NOTE: Make sure to use the latest scan tool software release.
If the cause is not visually evident, connect the scan tool to the Data Link Connector (DLC).
5. NOTE: The Vehicle Communication Module (VCM) LED prove-out confirms power and ground from the DLC are provided to the VCM.
If the scan tool does not communicate with the VCM:
- Check the VCM connection to the vehicle.
- Check the scan tool connection to the VCM.
- Refer to Information Bus, No Power To The Scan Tool, to diagnose no power to the scan tool.
6. If the scan tool does not communicate with the vehicle:
- Verify the ignition key is in the ON position.
- Verify the scan tool operation with a known good vehicle.
- Refer to Information Bus to diagnose no response from the PCM.
7. Carry out the network test.
- If the scan tool responds with no communication for one or more modules, refer to Information Bus.
- If the network test passes, retrieve and record the continuous memory DTCs.
8. NOTE: Make sure the Four-Wheel Drive (4WD) system is in the 2-Wheel Drive (2WD) position when running the IC self-test. Failure to follow this results in DTC C197A or DTC C197B setting in the IC.
Clear the continuous DTCs and carry out the self-test diagnostics for the IC, PCM, Restraints Control Module (RCM), ABS module and the SJB.
9. If the DTCs retrieved are related to the concern, go to DTC Charts. Instrumentation, Message Center and Warning Chimes
10. If no DTCs related to the concern are retrieved, GO to Symptom Chart - Instrument Cluster (IC), GO to Symptom Chart - Information And Message Center or GO to Symptom Chart - Warning Chimes. Instrumentation, Message Center and Warning Chimes
Instrument Cluster (IC) Dealer Test Mode
To enter the IC dealer test mode, press and hold the trip odometer reset button (base IC) or the message center RESET button (message center IC). Turn the ignition switch to the RUN position and continue to hold the trip odometer reset button or RESET button until the display indicates ENGINEERING TEST MODE, usually within 3 to 5 seconds. Press the trip odometer reset button or RESET button once to advance through each stage of the self-test.
To exit the IC dealer test mode, press and hold the trip odometer reset button or the RESET button for more than 3 seconds or simply turn the ignition switch to the OFF position.
NOTE: After exiting a dealer test mode session, it is necessary to record and clear all IC DTCs. Carry out the IC and PCM self-tests. Clear all DTCs, if DTC B2658 is present in the IC after the self-test, go to the DTC Charts. Instrumentation, Message Center and Warning Chimes
Instrument Cluster (IC) Dealer Test Mode
NOTE: The displays listed in the table below use xxx's to represent a numeric or alpha-numeric value or a text display. The value may display the same amount of characters represented by the xxx's or there may be more/less depending on the type of display. For example: VEHICLE SPEED xxx.x mph may display VEHICLE SPEED 45 mph or HW PARK DETCTN SW = xxxxxxxx may indicate either ACTIVE or INACTIVE.
