Diagnostic Procedure
AUTOMATIC TEMPERATURE CONTROL (ATC) BACK LIGHTING INOPERATIVE SYMPTOM CHART
| TEST | ACTION | APPLICABILITY |
|---|---|---|
| 1 | Turn the ignition on. With the DRBIII®, read MIC DTCs. Does DRBIII® display any DTCs? Yes --> Refer to the appropriate test for the related symptom(s). Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 2 |
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| 2 | Turn the ignition on. With the DRBIII®, read BCM DTCs. Does DRBIII® display any DTCs? Yes --> Refer to the appropriate test for the related symptom(s). Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 3 |
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| 3 | Turn the ignition off. Rotate the Panel Lamps Dimmer switch to the off position. Disconnect the ATC C1 harness connector. Turn the park lamps on. Measure the voltage of the Panel Lamps Driver circuit while rotating the Panel Lamps Dimmer switch from the off position to the full brightness position. Does the voltage change from approximately 4.5 volts to 11.5 volts? Yes --> Go To 4 No --> Go To 5 |
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| 4 | Turn the ignition off. Remove the inoperative bulb(s) from the Automatic Temperature Control (ATC) in accordance with the Service Information. Inspect the inoperative bulb(s). Is each inoperative bulb Okay? Yes --> Replace the Automatic Temperature Control (ATC) in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1 . No --> Replace the inoperative bulb(s) in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1 . |
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| 5 | Turn the ignition off. Disconnect the ATC C1 harness connector. Disconnect the Instrument Cluster C1 harness connector. Measure the resistance of the Panel Lamps Driver circuit between the ATC C1 harness connector and the Instrument Cluster C1 harness connector. Is the resistance below 5.0 ohms? Yes --> Replace the Instrument Cluster (EMIC) in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1 . No --> Repair the Panel Lamps Driver circuit for an open. Perform BODY VERIFICATION TEST - VER 1 . |
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