Perform the Driver Information System Check before processing.

Is the system check complete?

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Go to Step 2

Go to Driver Information System Check

1. Turn the ignition switch to OFF.
2. Disconnect the heater and A/C control connector.
3. Turn the headlamp switch to PARK or HEAD.
4. Turn the dimmer control to LO.
5. Measure the voltage from the heater and A/C control connector terminal A2 (BRN) to ground.

Does the measured voltage equal the specified value?

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Go to Step 3

Go to Step 6

1. Adjust the dimmer control.
2. At the same time, measure the voltage from the heater and A/C control connector terminal A2 (BRN) to ground.

Does the voltage vary with the dimmer control?

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Go to Step 5

Go to Step 4

1. Connect the dimmer module connector.
2. Adjust the dimmer control.
3. At the same time, backprobe the dimmer module connector. Measure the voltage from terminal C to ground.

Does the voltage vary with the dimmer control?

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Go to Step 6

Go to Interior Lights Dimming Schematics in Lighting Systems

Inspect the heater and A/C control connector terminal A2 for proper terminal contact.

Is the contact OK?

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Go to Step 7

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Inspect CKT 1244 (BRN) for an open or a short to ground.

Is the wiring OK

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Go to Driver Information System Check

Go to Step 8

Replace the instrument cluster.

Is the repair complete?

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Go to Driver Information System Check

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Repair the wiring.

Is the repair complete?

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Go to Driver Information System Check

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