Diagnosis Procedure
- CHECK REAR HEATED SEAT SWITCH INDICATOR POWER SUPPLY
- Turn ignition switch OFF.
- Disconnect rear heated seat switch connector.
- Turn ignition switch ON.
- Check voltage between rear heated seat switch harness connector and ground.
(+)
(-)
Condition
Battery voltage (V)
(Approx.)
Rear heated seat switch
Connector
Terminal
LH
B679
5
Ground
Ignition switch
OFF
0
RH
B649
ON
Battery voltage
Is the inspection result normal?
YES
GO TO 2.
NO
Repair or replace harness.
- CHECK REAR HEATED SEAT CONTROL UNIT INPUT SIGNAL
- Turn ignition switch OFF.
- Connect rear heated seat switch connector.
- Turn ignition switch ON.
- Check voltage between rear heated seat control unit harness connector and ground.
(+)
(-)
Condition
Voltage (V)
(Approx.)
Rear heated seat control unit
Connector
Terminal
LH
B647
8
Ground
Rear heated seat switch
HI mode
0
Other than the above
12
3
LO mode
0
Other than the above
12
RH
6
HI mode
0
Other than the above
12
1
LO mode
0
Other than the above
12
Is the inspection result normal?
YES
GO TO 4.
NO
GO TO 3.
- CHECK REAR HEATED SEAT SWITCH INDICATOR CIRCUIT
- Turn ignition switch OFF.
- Disconnect rear heated seat switch connector and rear heated seat control unit connector.
- Check continuity between rear heated seat switch harness connector and rear heated seat control unit harness connector.
Rear heated seat switch
Rear heated seat control unit
Continuity
Connector
Terminal
Connector
Terminal
LH
B679
9
B647
8
Existed
1
3
RH
B649
9
6
1
1
- Check continuity between rear heated seat switch harness connector and ground.
Rear heated seat switch
Ground
Continuity
Connector
Terminal
LH
B679
9
Not existed
1
RH
B649
9
1
Is the inspection result normal?
YES
GO TO 4.
NO
Repair or replace harness.
- CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident .
INSPECTION END