DTC Diagnosis Procedure With VQ40DE

Heats the heating element with the power supply from the heated mirror relay to defog the door mirror, or prevent the door mirror from fogging up.

1. CHECK FUSE 
   1. Turn ignition switch OFF.
   2. Check the 15A fuse (No. 43 located in IPDM E/R).

   Is the inspection result normal?

   YES

   GO TO 2.

   NO

   Replace the blown fuse after repairing the affected circuit.

2. CHECK POWER SUPPLY CIRCUIT 
   1. Turn ignition switch OFF.
   2. Disconnect door mirror LH connector.
   3. Turn ignition switch ON.
   4. Check voltage between door mirror LH harness connector and ground.

      (+)		(-)	Condition		Voltage (V) (Approx.)
      Door mirror LH
      Connector	Terminal
      D6	2	Ground	Rear window defogger switch	ON	Battery voltage
      				OFF	0 V

   Is the inspection result normal?

   YES

   GO TO 4.

   NO

   GO TO 3.

3. CHECK DOOR MIRROR DEFOGGER CIRCUIT 
   1. Turn ignition switch OFF.
   2. Disconnect IPDM E/R connector E120.
   3. Check continuity between IPDM E/R harness connector and door mirror LH harness connector.

      IPDM E/R		Door mirror LH		Continuity
      Connector	Terminal	Connector	Terminal
      E120	23	D6	2	Yes

   4. Check continuity between IPDM E/R harness connector E120 and ground.

      IPDM E/R		Ground	Continuity
      Connector	Terminal
      E120	23		No

   Is the inspection result normal?

   YES

   Replace IPDM E/R. Refer to Removal and Installation .

   NO

   Repair or replace harness.

4. CHECK GROUND CIRCUIT 
   1. Turn ignition switch OFF.
   2. Check continuity between door mirror LH harness connector and ground.

      Door mirror LH		Ground	Continuity
      Connector	Terminal
      D6	3		Yes

   Is the inspection result normal?

   YES

   Replace door mirror LH. Refer to Removal and Installation - Door Mirror Glass .

   NO

   Repair or replace harness.