Diagnosis Procedure

1. Switch heated steering mode to ON.
2. Check voltage between heated steering wheel relay harness connector and ground.

   Terminals			Voltage (Approx.)
   (+)		(-)
   Heated steering wheel relay		Ground
   Connector	Terminal
   M48	5	--	Battery voltage

Is the inspection result normal?

YES

GO TO 6.

NO

GO TO 2.

Check heated steering wheel relay. Refer to Component Inspection (Heated Steering Wheel Relay) .

Is the inspection result normal?

YES

GO TO 3.

NO

Replace heated steering wheel relay. Refer to Component Parts Location .

1. Turn the ignition switch OFF.
2. Disconnect heated steering wheel relay harness connector.
3. Check voltage between heated steering wheel relay harness connector and ground.

   Terminals			Voltage (Approx.)
   (+)		(-)
   Heated steering wheel relay		Ground
   Connector	Terminal
   M48	1	--	Battery voltage
   	3

Is the inspection result normal?

YES

GO TO 5.

NO

GO TO 4.

1. Check 10A fuse (#36).
2. Disconnect fuse block (J/B) harness connector.
3. Check continuity between heated steering wheel relay harness connector terminal and fuse block (J/B) harness connector terminal.

   Heated steering wheel relay		Fuse block (J/B)		Continuity
   Connector	Terminal	Connector	Terminal
   M48	1	M132	2B	Existed
   	3

4. Check continuity between heated steering wheel relay harness connector terminal and ground.

   Heated steering wheel relay		Ground --	Continuity
   Connector	Terminal
   M48	1	Ground	Not existed
   	3

Is the inspection result normal?

YES

Perform trouble diagnosis for battery power supply circuit.

NO

Repair or replace error-detected parts.

1. Disconnect heated steering wheel harness connector.
2. Check continuity between heated steering wheel relay harness connector terminal and A/C auto amp. harness connector terminal.

   Heated steering wheel relay		A/C auto amp.		Continuity
   Connector	Terminal	Connector	Terminal
   M48	2	M88	20	Existed

3. Check continuity between heated steering wheel relay harness connector terminal and ground.

   Heated steering wheel relay		--	Continuity
   Connector	Terminal
   M48	2	Ground	Not existed

Is the inspection result normal?

YES

Repair or replace A/C auto amp., refer to Removal and Installation .

NO

Repair or replace error-detected parts.

1. Disconnect heated steering wheel harness connector.
2. Check continuity between heated steering wheel relay harness connector and heated steering wheel harness connector.

   Heated steering wheel relay		Heated steering wheel		Continuity
   Connector	Terminal	Connector	Terminal
   M48	5	M47	1	Existed

3. Check continuity between heated steering wheel relay harness connector terminal and ground.

   Heated steering wheel relay		--	Continuity
   Connector	Terminal
   M48	5	Ground	Not existed

Is the inspection result normal?

YES

GO TO 7.

NO

Repair or replace error-detected parts.

Check heated steering wheel. Refer to Component Inspection (Heated Steering Wheel) .

Is the inspection result normal?

YES

GO TO 8.

NO

Replace heated steering wheel. Refer to Removal and Installation .

Check continuity between heated steering wheel harness connector terminal and ground.

Is the inspection result normal?

YES

Check the intermittent incident. Refer to Intermittent Incident .

NO

Repair or replace damaged parts.