Instrument Cluster / Carrier: Testing and Inspection

Instrument Cluster:

TEST
The instrument clusters are equipped with a self diagnostic test feature to help identify electronic problems. Prior to any test, perform the Self-Diagnostic Test. The self diagnostic system displays instrument cluster stored fault codes in the odometer display, sweeps the gauges to the calibration points, and bulb checks the warning indicators. When the key is in the ON position with the engine not running, the MIL will remain illuminated for regulatory purposes.

To activate the Self-Diagnostic program:
1. With the ignition switch in the OFF position, depress the TRIP ODOMETER RESET button.

Instrument Cluster DTC's:

2. Continue to hold the TRIP ODOMETER RESET button until Sof and a number (software version number (i.e. Sof 3.2) appears in the odometer window (about five seconds) then release the button. If a fault code is present, the cluster will display it in the odometer display. When all fault codes have been displayed, the cluster will display "end" in the odometer display. Refer to the table to determine what each trouble code means.

Dim Test
When CHEC-0 is displayed in the odometer window, the cluster's Vacuum Fluorescent (VF) displays will dim down. If the VF display brightness does not change, a problem exists in the cluster.

Cluster Calibration:

Calibration Test
When CHEC-1 is displayed in the odometer window, each of the cluster's gauge pointers will move sequentially through each calibration point. The table contains the proper calibration points for each gauge. If the gauge pointers are not calibrated, a problem exists in the cluster. If any gauge is out of calibration, replace the cluster.

Odometer Segment Test
When CHEC-2 is displayed in the odometer window, each digit of the odometer will illuminate sequentially. If a segment in the odometer does not illuminate normally, a problem exists in the display.

Electronic Transmission Range Indicator Segment Test
When CHEC-3 is displayed in the odometer window, each segment of the transmission range indicator will illuminate sequentially. If a segment in the transmission range indicator does not illuminate normally, a problem exists in the display board.

Conditions
Refer to the following tables for possible problems, causes, and corrections.
- Instrument Cluster
- Speedometer Diagnosis
- Tachometer Diagnosis
- Fuel Gauge Diagnosis
- Temperature Gauge Diagnosis
- Odometer Diagnosis
- Electronic Gear Indicator Display Diagnosis
- Mechanical Transmission Range Indicator (PRND21) Diagnosis

NOTE: Always check the functionality of the cluster by running the self test prior to troubleshooting.