NO. 7 INSTRUMENT CLUSTER ILLUMINATION DOES NOT DIM WHEN TAILLIGHTS ILLUMINATE [INSTRUMENT CLUSTER]
id0903d5828400
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7 |
Instrument cluster illumination does not dim when taillights illuminate |
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POSSIBLE CAUSE
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• Instrument cluster malfunction
• Connector or pin malfunction
• BCM malfunction
• Short circuit in wiring harness between CAN-L, CAN-H and ground
• Open circuit in CAN wiring harness (CAN-L, CAN-H)
• CAN wiring harness (CAN-L, CAN-H) short each other
• Light switch malfunction
• Malfunction in vehicle wiring harness between light switch and BCM
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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1
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• Switch the ignition to ON.
• Does the instrument cluster illumination dim according to the illumination setting?
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Yes
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Troubleshooting completed. (The system is normal.)
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No
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Go to the next step.
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2
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• Retrieve DTCs from the instrument cluster and BCM using the M-MDS.
(See DTC INSPECTION [BCM].)
• Can DTCs be verified?
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Yes
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Go to the applicable DTC inspection.
(See DTC TABLE [BCM].)
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No
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Go to the next step.
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3
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• Monitor the BCM PID TNS_SW using the M-MDS.
• Does the M-MDS monitored value correspond to the light switch position?
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Yes
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Replace the instrument cluster.
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No
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Inspect the following and repair or replace the malfunctioning location.
• Light switch
(See LIGHT SWITCH INSPECTION.)
• Vehicle wiring harness between light switch and BCM
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