Diagnosis Procedure

Regarding Wiring Diagram information, refer to WIRING DIAGRAM .

1. CHECK FUSES
   
   

   Check if any of the following fuses in fuse block (J/B) are blown.

   COMPONENT PARTS	AMPERE	FUSE NO.
   Fuse block (J/B)	15A	23
   	15A	24

   Is the inspection result normal?

   YES 

   GO TO STEP 2  .

   NO 

   If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.

2. CHECK POWER SUPPLY CIRCUIT
   
   
   1. Turn ignition switch ON.
   2. Check voltage between rear window defogger connector and ground.

      (+)		(-)	Condition		Voltage (V) (Approx.)
      Rear window defogger
      Connector	Terminal
      D510	1	Ground	Rear window defogger switch	ON	Battery voltage
      				OFF	0

   Is the inspection result normal?

   YES 

   GO TO STEP 3  .

   NO 

   GO TO STEP 4  .

3. CHECK GROUND CIRCUIT
   
   
   1. Turn ignition switch OFF.
   2. Disconnect rear window defogger.
   3. Check continuity between rear window defogger connector and ground.

      Rear window defogger		Ground	Continuity
      Connector	Terminal
      D525	2		Yes

   Is the inspection result normal?

   YES 

   GO TO STEP 6  .

   NO 

   Repair or replace harness.

4. CHECK HARNESS CONTINUITY 1
   
   
   1. Turn ignition switch OFF.
   2. Disconnect rear window defogger condenser and rear window defogger.
   3. Check continuity between rear window defogger condenser connector and rear window defogger connector.

      Rear window defogger condenser		Rear window defogger		Continuity
      Connector	Terminal	Connector	Terminal
      D509	2	D510	1	Yes

   Is the inspection result normal?

   YES 

   GO TO STEP 5  .

   NO 

   Replace or repair harness.

5. CHECK HARNESS CONTINUITY 2
   
   
   1. Disconnect fuse block (J/B).
   2. Check continuity between fuse block (J/B) connector and rear window defogger condenser connector.

      Fuse block (J/B)		Rear window defogger condenser		Continuity
      Connector	Terminal	Connector	Terminal
      B29	3T	D508	1	Yes
      	5T

   Is the inspection result normal?

   YES 

   Replace rear window defogger condenser.

   NO 

   Replace or repair harness.

6. CHECK FILAMENT
   
   

   Check filament. Refer to COMPONENT INSPECTION .

   Is the inspection result normal?

   YES 

   Refer to INTERMITTENT INCIDENT .

   NO 

   Repair filament. Refer to INSPECTION AND REPAIR .