Honda Pilot: Power Mirror Switch Test

Test

1. Driver's Dashboard Lower Cover - Remove

2. Power Mirror Switch - Test

1. Check the power mirror switch (A) according to the table.

NOTE:

• When an LED is located between terminals, check if the LED illuminates by connecting power and ground to the LED.
• Note this important operating characteristic; diode bias causes a diode to fully conduct electricity in one direction (forward), while not at all in the opposite direction (reverse).

*1: With retract power mirror

2. If the result is not as specified, replace the power mirror switch.

3. All Removed Parts - Install

1. Install the parts in the reverse order of removal.

Power Mirrors (Front Passenger's Power Window Switch) Input Test

NOTE:

• Before testing, check for DTCs. If any DTCs are indicated, troubleshoot those DTCs first.
• Before testing, make sure the No. C4 (20 A) fuse in the under-dash fuse/relay box is OK.

1. Turn the vehicle to the OFF (LOCK) mode.

2. Disconnect the front passenger's power window switch 24P connector.

3. Inspect the connector and socket terminals to be sure they are all making good contact:

• If the terminals are bent, loose, or corroded, repair them as necessary, and recheck the system.
• If the terminals look OK, go to step 4.

4. Reconnect the 24P connector to the power window switch, do the following input tests:

• If any test indicates a problem, find and correct the cause, then recheck the system.

  If all the input tests prove OK, go to step 5.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result  is not obtained
14	GRN	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. C4 (20 A) fuse in the under­dash fuse/relay box An open or high resistance in the wire
9	BLK	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G405) An open or high resistance in the ground wire

5. Turn the vehicle to the OFF (LOCK) mode.

6. Disconnect the connector from the front passenger's power window switch, and do the following input tests:

• If any test indicates a problem, find and correct the cause, then recheck the system.
• If all the input tests prove OK, replace the front passenger's power window switch.

NOTE: After replacing the front passenger's power window switch, do the resetting the power window control unit.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
15*1 - 16*1	YEL - PNK	Vehicle ON mode, connect terminals No. 14 to No. 15 (or No. 16) and terminal No. 16 (or No. 15) to body ground with a jumper wires NOTE: if the mirror stops moving, disconnect battery power immediately.	Check the retract actuator operation: The right mirror should retract (or extend).	Faulty right retract actuator An open or high resistance in the wire
6*2	LT GRN	Under all conditions, connect terminals No. 14 and No. 6 with a jumper wire	Check the right power mirror defogger operation: The right power mirror defogger should work (the inside lower edge becomes warm).	Faulty right power mirror defogger Poor ground (G405) or an open in the ground wire An open or high resistance in the wire
17*3 - 18*3	WHT - BRN	Under all conditions	Connect terminals No. 14 and No. 17 (or No. 18), and terminals No. 18 (or No. 17) and No. 9 with jumper wires: The right power mirror should UP (or DOWN).	Faulty right power mirror actuator Poor ground (G405) or an open in the ground wire An open or high resistance in the wire
17*3 - 20*3	WHT - RED	Under all conditions	Connect terminals No. 14 and No. 17 (or No. 20), and terminals No. 20 (or No. 17) and No. 9 with jumper wires: The right power mirror should LEFT (or RIGHT).	Faulty right power mirror actuator Poor ground (G405) or an open in the ground wire An open or high resistance in the wire
24	GRY	Disconnect these connectors: Power window master switch 37P connector Moonroof motor-control unit 14P connector	Check for continuity between terminal No. 24 and power window master switch 37P connector terminal No. 36: There should be continuity.	An open in the LIN(WINDOW) wire
			Check for continuity between terminal No. 24 and moonroof motor-control unit 14P connector terminal No. 12: There should be continuity.	An open in the LIN(WINDOW) wire
			Check for continuity to ground: There should be no continuity.	A short to ground in the LIN(WINDOW) wire

*1: With retractable mirror
*2: With mirror defogger
*3: Without DPMS, auto idle stop system

Power Mirrors (Power Window Master Switch) Input Test

NOTE:

• Before testing, check for DTCs. If any DTCs are indicated, troubleshoot those DTCs first.
• If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A.
• Before testing, make sure the No. C23 (7.5 A) fuse in the under-dash fuse/relay box is OK.

1. Turn the vehicle to the OFF (LOCK) mode.

2. Disconnect the power window master switch 37P connector.

3. Inspect the connector and socket terminals to be sure they are all making good contact:

• If the terminals are bent, loose, or corroded, repair them as necessary, and recheck the system.
• If the terminals look OK, go to step 4.

4. Reconnect the connector to the control unit, do the following input tests:

• If any test indicates a problem, find and correct the cause, then recheck the system.
• If all the input tests prove OK, go to step 5.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
25	LT GRN	Vehicle ON mode	Measure the voltage to ground: There should be battery voltage.	Blown No. C23 (7.5 A) fuse in the under-dash fuse/relay box An open or high resistance in the wire
5*1	LT BLU	Vehicle ON mode	Connect terminals No. 5 and No. 25, and power mirror switch 13P connector terminals No. 9 and No. 13 with jumper wires: The left power mirror should UP.	Faulty left power mirror actuator Poor ground (G401) or an open in the ground wire An open or high resistance in the wire
3	BLK	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G401) An open or high resistance in the ground wire
31	BLK	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G401) An open or high resistance in the ground wire
11*2	BRN	Vehicle ON mode, power mirror switch in EXTEND position	Measure the voltage to ground: There should be less than 0.2 V.	Faulty power mirror switch Poor ground (G401) or an open in the ground wire An open or high resistance in the wire
		Vehicle ON mode, power mirror switch in RETRACT position	Measure the voltage to ground: There should be less than 0.2 V.	Faulty power mirror switch A short to ground in the wire

*1: Without DPMS, auto idle stop system
*2: With retractable mirror

5. Turn the vehicle to the OFF (LOCK) mode.

6. Disconnect the connector from the power window master switch, and do the following input tests:

• If any test indicates a problem, find and correct the cause, then recheck the system.
• If all the input tests prove OK, replace the power window master switch.

NOTE: After replacing the power window master switch, do the resetting the power window control unit.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
8*1 - 9*1	WHT - GRN	Vehicle ON mode, connect terminals No. 25 to No. 8 (or No. 9) and terminal No. 9 (or No. 8) to body ground with a jumper wires NOTE: if the mirror stops moving, disconnect battery power immediately.	Check the retract actuator operation: The left mirror should retract (or extend).	Faulty left retract actuator An open or high resistance in the wire
6*2	BLU	Power mirror switch in RIGHT mirror position	Check for continuity to ground: There should be continuity.	Faulty power mirror switch Poor ground (G401) or an open in the ground wire An open or high resistance in the wire
7*2	TAN	Power mirror switch in RIGHT mirror position	Check for continuity to ground: There should be continuity.	Faulty power mirror switch Poor ground (G401) or an open in the ground wire An open or high resistance in the wire
15*3	TAN	Vehicle ON mode, connect terminals No. 25 and No. 15 with a jumper wire	Check the left power mirror defogger operation: The left power mirror defogger should work (the inside lower edge becomes warm).	Faulty left power mirror defogger Poor ground (G401) or an open in the ground wire An open or high resistance in the wire
36	GRY	Disconnect these connectors: Front passenger's power window switch 24P connector Moonroof motor-control unit 14P connector	Check for continuity between terminal No. 36 and front passenger's power window switch 24P connector terminal No. 24: There should be continuity.	An open in the LIN(WINDOW) wire
			Check for continuity between terminal No. 36 and moonroof motor-control unit 14P connector terminal No. 12: There should be continuity.	An open in the LIN(WINDOW) wire
			Check for continuity to ground: There should be no continuity.	A short to ground in the LIN(WINDOW) wire

*1: With retractable mirror
*2: Without DPMS, auto idle stop system
*3: With mirror defogger