Test Description
The numbers below refer to the step numbers on the diagnostic table.
- 6: This step tests the integrity of both the mirror control circuits and the power mirror switch. If both power mirrors are inoperative on one or more axis, begin testing by disconnecting one of the power mirrors, if an open circuit is detected and repaired for that power mirror, repeat step 6 for the other power mirror.
- 7: This step tests the integrity of the battery positive voltage circuit not the fuse.
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Outside Rearview Mirror Schematics Connector End View Reference: Mirror Connector End Views | |||
| 1 | Did you review the Outside Mirror Description and Operation? | Go to Step 2 | Go to Outside Mirror Description and Operation |
| 2 | Place the mirror selector switch in the left mirror position. Operate the mirror position switch in the up, down, left and right directions and note the operation. Place the mirror selector switch in the right mirror position. Operate the mirror position switch in the up, down, left and right directions and note the operation. Do both power mirrors operate properly? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
| 3 | Are both the left and right power mirrors completely inoperative? | Go to Step 4 | Go to Step 6 |
| 4 | Disconnect the power mirror switch. Probe the battery positive voltage circuit of the power mirror switch harness connector with a test lamp that is connected to ground. Does the test lamp illuminate? | Go to Step 5 | Go to Step 7 |
| 5 | Connect a test lamp between the battery positive voltage circuit of the power mirror switch harness connector and the ground circuit of the power mirror switch harness connector. Does the test lamp illuminate? | Go to Step 9 | Go to Step 15 |
| 6 | Disconnect the inoperative power mirror. Connect a test lamp between the appropriate mirror motor control circuits of the power mirror harness connector. Place the mirror selector switch to the mirror to be tested. Operate the power mirror switch in both directions for the functions being tested. Does the test lamp illuminate in both directions? | Go to Step 12 | Go to Step 8 |
| 7 | Test the battery positive voltage circuit of the power mirror switch for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 18 | Go to Step 9 |
| 8 | Test the mirror motor control circuits for an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 18 | Go to Step 9 |
| 9 | If the power mirrors were previously disconnected, connect the power mirrors. If the power mirror switch was not previously disconnected, disconnect the power mirror switch. Probe each of the power mirror motor control circuits of the power mirror switch harness connector with a test lamp that is connected to battery positive voltage. Did the test lamp illuminate at any of the power mirror motor control circuits? | Go to Step 13 | Go to Step 10 |
| 10 | Probe each of the power mirror motor control circuits of the power mirror switch harness connector with a test lamp that is connected to a good ground. Did the test lamp illuminate at any of the power mirror motor control circuits? | Go to Step 14 | Go to Step 11 |
| 11 | Inspect for poor connections at the harness connector of the power mirror switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 18 | Go to Step 16 |
| 12 | Inspect for poor connections at the harness connector of the power mirror. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 18 | Go to Step 17 |
| 13 | Repair the short to ground in the power mirror motor control circuit. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 18 | |
| 14 | Repair the short to battery positive voltage in the power mirror motor control circuit. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 18 | |
| 15 | Repair the open in the power mirror switch ground circuit. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 18 | |
| 16 | Replace the power mirror switch. Refer to Power Mirror Switch Replacement . Did you complete the replacement? | Go to Step 18 | |
| 17 | Replace the power mirror. Refer to Mirror Replacement . Did you complete the replacement? | Go to Step 18 | |
| 18 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Power Mirrors Inoperative
Inside Rearview Mirror with the Automatic Day-Night Feature System Operation
The inside rearview mirror uses 2 photocell sensors. One sensor is the headlight sensor, located on the rear side of the mirror. The headlight sensor is used to determine light conditions present at the mirror face. The other sensor is the ambient light sensor, located on the front of the mirror or windshield side. The ambient light sensor is used to determine light conditions present at the mirror. With automatic day-night feature enabled, the mirror uses ambient light sensor to determine the exterior light condition. With a low light condition detected, and a high light condition from behind at the headlight sensor, the inside rearview mirror will automatically darken the face of the mirror.
In the daytime, the mirror is in a normal state because of the high light condition that is indicated by the ambient light sensor. With the gear selector lever in the REVERSE position, backup lamp supply voltage is supplied as an input to the inside rearview mirror. In night time conditions only, the mirror monitors this input to disable the automatic day-night feature which allows the face to gradually change to a normal state. This allows the driver to see objects in the mirror clearly when backing up.