Power Mirror Circuit Input Test

MICU

1. Turn the ignition switch OFF.
2. Remove the left side kick panel (see TRIM REMOVAL/INSTALLATION - DOOR AREAS ).
3. Disconnect driver's under-dash fuse/relay box connector P (30P).
   Fig 1: Identifying Driver's Under-Dash Fuse/Relay Box Connector P (3Op)

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
4. 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 5.
5. Reconnect the connector to the driver's under-dash fuse/relay box.
   • 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 6.
     WIRE CAVITY CHART
     
     

     Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
     P9	WHT	Power mirror switch in UP	Measure the voltage to ground: There should be less than 1 V.	Poor ground (G501) Faulty power mirror switch An open in the wire
     		Power mirror switch released	Measure the voltage to ground: There should be 5 V or more.	Faulty power mirror switch A short to ground in the wire
     P10	PNK	Power mirror switch in DOWN	Measure the voltage to ground: There should be less than 1 V.	Poor ground (G501) Faulty power mirror switch An open in the wire
     		Power mirror switch released	Measure the voltage to ground: There should be 5 V or more.	Faulty power mirror switch A short to ground in the wire
     P25	GRN	Power mirror switch in LEFT	Measure the voltage to ground: There should be less than 1 V.	Poor ground (G501) Faulty power mirror switch An open in the wire
     		Power mirror switch released	Measure the voltage to ground: There should be 5 V or more.	Faulty power mirror switch A short to ground in the wire
     P26	BLU	Power mirror switch in RIGHT	Measure the voltage to ground: There should be less than 1 V.	Poor ground (G501) Faulty power mirror switch An open in the wire
     		Power mirror switch released	Measure the voltage to ground: There should be 5 V or more.	Faulty power mirror switch A short to ground in the wire
     P11	PUR	Power mirror switch in L position	Measure the voltage to ground: There should be less than 1 V.	Poor ground (G501) Faulty power mirror switch An open in the wire
     		Power mirror switch released	Measure the voltage to ground: There should be 5 V or more.	Faulty power mirror switch A short to ground in the wire
     P22	GRY	Power mirror switch in R position	Measure the voltage to ground: There should be less than 1 V.	Poor ground (G501) Faulty power mirror switch An open in the wire
     		Power mirror switch released	Measure the voltage to ground: There should be 5 V or more.	Faulty power mirror switch A short to ground in the wire

   Driver's MPCS Unit 

6. Remove the driver's door panel (see FRONT DOOR PANEL REMOVAL/INSTALLATION ).
7. Disconnect driver's MPCS unit connector A (40P).
   Fig 2: Identifying Driver's MPCS Unit Connector A (40P)

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
8. Inspect the connector and socket terminal 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 9.
9. With the connector still disconnected, make these input tests at the connector.
   • 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 10.
     WIRE CAVITY CHART
     
     

     Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
     A5(1)	BLK	Under all conditions	Measure the voltage to ground: There should be less than 0.5 V.	Poor ground (G601) Faulty power mirror switch An open in the wire
     A7(1)	WHT	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. 15 (40A) fuse in the under-dash fuse/relay box Blown No. 7 (10A) fuse in the driver's under-hood fuse/relay box An open in the wire
     A8	GRY	Under all conditions	Check for continuity between the A8 terminal and front passenger's MPCS unit connector A (28P) No. 4 terminal: There should be continuity.	Faulty driver's under-dash fuse/relay box Faulty passenger's under-dash fuse/relay box An open in the wire
     A16	ORN	Under all conditions	Connect the A7 and A16 terminals, and A5 and A38 terminals: The left power mirror moves UP.	Faulty left power mirror actuator An open in the wire
     A38	YEL
     A17	GRN	Under all conditions	Connect the A7 and A17 terminals, and A5 and A38 terminals: The left power mirror swings LEFT.	Faulty left power mirror actuator An open in the wire
     A38	YEL
     (1) Reconnect the connector to the driver's MPCS unit.

   Front Passenger's MPCS Unit 

10. Remove the front passenger's door panel (see FRONT DOOR PANEL REMOVAL/INSTALLATION ).
11. Disconnect front passenger's MPCS unit connector A (28P).
    Fig 3: Identifying Front Passenger's MPCS Unit Connector A (28P)

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
12. 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 13.
13. With the connector still disconnected, make these input tests at the connector.
    • 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 14.
      WIRE CAVITY CHART
      
      

      Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
      A7(1)	BLK	Under all conditions	Measure the voltage to ground: There should be less than 0.5 V.	Poor ground (G506) Faulty power mirror switch An open in the wire
      A2(1)	WHT	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. 15 (40A) fuse in the under-hood fuse/relay box Blown No. 7 (10A) fuse in the driver's under-dash fuse/relay box An open in the wire
      A4	GRY	Under all conditions	Check for continuity between the A4 terminal and driver's MPCS unit connector A (40P) No. 8 terminal: There should be continuity.	Faulty driver's under-dash fuse/relay box Faulty passenger's under-dash fuse/relay box An open in the wire
      A10	LT GRN	Under all conditions	Connect the A2 and A10 terminals, and A7 and A25 terminals: The right power mirror moves UP.	Faulty right power mirror actuator An open in the wire
      A25	GRY
      A11	GRN	Under all conditions	Connect the A2 and A11 terminals, and A7 and A25 terminals: The left power mirror swings RIGHT.	Faulty right power mirror actuator An open in the wire
      A25	GRY
      (1) Reconnect the connector to the front passenger's MPCS unit.

14. If multiple failures are found on more than one control unit, replace the driver's under-dash fuse/relay box (includes the MICU). If input failures are related to a particular control unit, replace the control unit.