Automatic Dimming Inside Mirror Test

Automatic Dimming Inside Mirror Test

1. Check for obstructions (parking stickers, labels, etc.) over the front-facing lux level sensor (A).





2. Disconnect automatic dimming inside mirror 7P connector (B).

3. Turn the ignition switch to ON (II).

4. Measure the voltage between terminal No. 2 and body ground.

- If there is less than 0.2 V, go to step 5.
- If there is more than 0.2 V, check for:
- Poor ground (G501).
- An open or high resistance in the wire.

5. Measure the voltage between terminal No. 1 and body ground.

- If there is battery voltage, go to step 6.
- If there is no voltage, check for:
- Blown No. 5 (7.5 A) fuse in the driver's under-dash fuse/relay box.
- An open or high resistance in the wire.

6. Measure the voltage between terminal No. 3 and body ground with the shift lever in R (reverse) position.

- If there is battery voltage, replace the mirror assembly Rearview Mirror Replacement.
- If there is no voltage, check for:
- Faulty driver's under-dash fuse/relay box.
- Faulty transmission range switch (A/T).
- Faulty back-up light switch (M/T).
- An open or high resistance in the wire.