Diagnostic Aids
The automatic day-night feature of the mirrors may not operate properly or become inoperative due to the following:
| • | An intermittent short to ground or battery positive voltage in the signal circuit of the driver outside rearview mirror element (if equipped). |
| • | An intermittent short to battery positive voltage in the backup lamp supply voltage circuit. |
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Inside Rearview Mirror Schematics | ||||
1 | Did you review the operation of the automatic day-night feature of the inside rearview mirror and perform the necessary inspections? | -- | Go to Step 2 | |
2 | Is the vehicle equipped with a driver outside rearview mirror with the automatic day-night feature? | -- | Go to Step 3 | Go to Step 4 |
3 |
Do the inside rearview mirror and the driver outside rearview mirror remain in a darkened state? | -- | Go to Step 12 | Go to Step 4 |
4 |
Does the inside rearview mirror darken? | -- | Go to Diagnostic Aids | Go to Step 5 |
5 |
Is the resistance less than the specified value? | 3 ohms | Go to Step 6 | Go to Step 13 |
6 |
Is the voltage within the specified range? | B+ | Go to Step 7 | Go to Step 14 |
7 |
Is the voltage less than the specified value? | 0.5 V | Go to Step 8 | Go to Backup Lamps Always On in Lighting Systems |
8 |
Is the voltage within the specified range? | B+ | Go to Step 10 | Go to Step 9 |
9 | Test the backup lamp supply voltage circuit of the inside rearview mirror for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 16 | Go to Backup Lamps Inoperative in Lighting Systems |
10 | Test the signal circuit of the driver outside rearview mirror element (if equipped) for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 16 | Go to Step 11 |
11 | Inspect for poor connections at the harness connector of the inside rearview mirror. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 16 | Go to Step 15 |
12 |
Important:: A short to battery positive voltage on the signal circuit of the driver outside rearview mirror element will cause permanent damage to the driver outside rearview mirror, and the inside rearview mirror. Repair a short to battery positive voltage in the signal circuit of the driver outside rearview mirror element. Refer to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 16 | -- |
13 | Repair an open or high resistance in the ground circuit of the inside rearview mirror. Refer to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 16 | -- |
14 | Repair an open or short to ground in the Ignition 3 voltage circuit of the inside rearview mirror. Refer to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 16 | -- |
15 |
Important: Perform the Compass Calibration and Variance procedure for the inside rearview mirror with compass. Replace the inside rearview mirror. Refer to Inside Rearview Mirror Replacement . Did you complete the replacement? | -- | Go to Step 16 | -- |
16 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
