Power Mirror Function Test

NOTE:  The power window master switch has built into the door multiplex control unit, the right power mirror is controlled by the front passenger's power window switch. When the power mirror switch is operated, the power window master switch receives the signals from the power mirror switch and sends the signals to the front passenger's power window switch. If there is malfunction of the right power mirror actuator operation, do the power window master switch input test  and front passenger's power window switch input test . Also, the power mirror defoggers, position sensor and retractable power mirrors are controlled by power window master switch and front passenger's power window switch, do the power window master switch input test  and front passenger's power window switch input test .

1. Remove the power mirror switch and disconnect 13P connector from it .

Courtesy of HONDA, U.S.A., INC.

2. Choose the appropriate test based on the symptom:

• Both mirrors do not work, go to step 3.
• Left mirror does not work, go to step 5.
• Right mirror (Without door multiplex control unit) does not work, go to step 6.
• Mirror defogger (Without door multiplex control unit) does not work, go to step 7.

Both Mirrors 

3. Measure the voltage between terminal No. 4 and body ground with the vehicle to ON mode. There should be battery voltage.

• If there is no battery voltage, check for:
• • Blown No. B22 (7.5 A) fuse in the under-dash fuse/relay box.
  • An open or high resistance in the PNK wire.
• If there is battery voltage, go to step 4.

4. Check for continuity between terminals No. 13 and body ground. There should be continuity.

• If there is no continuity, check for:
• • An open or high resistance in the BLK wire.
  • Poor ground (G501).
• If there is continuity, check both mirrors individually.

Left Mirror 

5. Connect terminals No. 4 and No. 9, and terminals No. 1 (or No. 7) and No. 13 with jumper wires. The left mirror should tilt down (or swing left) with vehicle to ON mode.

• If the left mirror does not tilt down (or does not swing left), check for an open or high resistance in the TAN (or GRY) wire between the left mirror and the 13P connector. If the wire is OK, check the left mirror actuator .
• If the mirror neither tilts down nor swings left, repair the PUR wire.
• If the mirror works properly, check the mirror switch .

Right Mirror (Without door multiplex control unit) 

6. Connect terminals No. 4 and No. 8, and terminals No. 1 (or No. 6) and No. 13 with jumper wires. The right mirror should tilt down (or swing left) with vehicle to ON mode.

• If the right mirror does not tilt down (or does not swing left), check for an open or high resistance in the TAN (or BLU) wire between the right mirror and the 13P connector. If the wire is OK, check the right mirror actuator .
• If the mirror neither tilts down nor swings left, repair the WHT wire.
• If the mirror works properly, check the mirror switch .

Mirror Defogger (Without door multiplex control unit) 

7. Connect rear window defogger relay terminals No. 1 and No. 2 with a jumper wire. Measure the voltage between terminal No. 4 of the mirror connectors and body ground. There should be battery voltage and both mirrors should warm up.

• If there is no voltage or neither warms up, check for:
• • An open or high resistance in the TAN wire.
  • Blown No. A2-6 (30 A) or No. A10 (7.5 A) fuse in the under-hood fuse/relay box.
• If only one fails to warm up, check:
• • Its defogger.
  • Poor ground (G501, G503).
• If both warm up, check the defogger switch or the rear window defogger relay.