Instrument Cluster / Carrier: Testing and Inspection: Diagnosis and Testing
DIAGNOSIS AND TESTING - INSTRUMENT CLUSTERIf all of the instrument cluster gauges and/or indicators are inoperative, refer to PRELIMINARY DIAGNOSIS. If an individual gauge or Programmable Communications Interface (PCI) data bus message-controlled indicator is inoperative, refer to ACTUATOR TEST. If an individual hard wired indicator is inoperative, refer to the diagnosis and testing information for that specific indicator. If the base instrument cluster incandescent illumination lighting is inoperative, refer to CLUSTER ILLUMINATION DIAGNOSIS. If the premium instrument cluster electro-luminescent illumination lighting is inoperative, refer to ACTUATOR TEST. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness connectors, splices and grounds.
NOTE: Occasionally, a condition may be encountered where the gauge pointer for the speedometer or the tachometer becomes caught on the wrong side of the pointer stop. To correct this condition, the technician should use a DRBIII scan tool and the appropriate diagnostic information to perform the instrument cluster self-diagnostic actuator test procedure. When performed, the actuator test procedure will automatically return the pointer to the correct side of the pointer stop.
PRELIMINARY DIAGNOSIS
WARNING:
- ON VEHICLES EQUIPPED WITH AIR- BAGS, DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, DRIVER AIRBAG, PASSENGER AIRBAG, SIDE CURTAIN AIRBAG, FRONT IMPACT SENSOR, SIDE IMPACT SENSOR, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
- ON VEHICLES EQUIPPED WITH THE PREMIUM INSTRUMENT CLUSTER, THE CLUSTER CIRCUITRY PROVIDES AN ALTERNATING CURRENT TO SUPPLY POWER TO THE ELECTRO-LUMINESCENT ILLUMINATION LAMP THROUGH A PIGTAIL WIRE AND CONNECTOR THAT IS ACCESSIBLE AT THE BACK OF THE CLUSTER HOUSING. USE PROPER PRECAUTIONS WHEN HANDLING THIS UNIT DURING DIAGNOSIS OR SERVICE TO AVOID ELECTRICAL SHOCK AND POSSIBLE PERSONAL INJURY.
1. Check the fused B(+) fuse (Fuse 17 - 10 ampere) in the Junction Block (JB). If OK, go to Step 2. If not OK, repair the shorted circuit or component as required and replace the faulty fuse.
2. Check for battery voltage at the fused B(+) fuse (Fuse 17 - 10 ampere) in the JB. If OK, go to Step 3. If not OK, repair the open fused B(+) circuit between the JB and the Power Distribution Center (PDC) as required.
3. Check the fused ignition switch output (run- start) fuse (Fuse 22 - 10 ampere) in the JB. If OK, go to Step 4. If not OK, repair the shorted circuit or component as required and replace the faulty fuse.
4. Turn the ignition switch to the On position. Check for battery voltage at the fused ignition switch output (RUN/START) fuse (Fuse 22 - 10 ampere) in the JB. If OK, go to Step 5. If not OK, repair the open fused ignition switch output (RUN/START) circuit between the JB and the ignition switch as required.
5. Turn the ignition switch to the Off position. Disconnect and isolate the battery negative cable. Remove the instrument cluster. Reconnect the battery negative cable. Check for battery voltage at the fused B(+) circuit cavity of the instrument panel wire harness connector for the instrument cluster. If OK, go to Step 6. If not OK, repair the open fused B(+) circuit between the instrument cluster and the JB as required.
6. Turn the ignition switch to the On position. Check for battery voltage at the fused ignition switch output (RUN/START) circuit cavity of the instrument panel wire harness connector for the instrument cluster. If OK, go to Step 7. If not OK, repair the open fused ignition switch output (RUN/START) circuit between the instrument cluster and the JB as required.
7. Turn the ignition switch to the Off position. Disconnect and isolate the battery negative cable. Check for continuity between each of the ground circuit cavities of the instrument panel wire harness connector for the instrument cluster and a good ground. There should be continuity. If OK, refer to the ACTUATOR TEST . If not OK, repair the open ground circuit(s) between the instrument cluster and ground (G200) as required.