Diagnosis Procedure
- CHECK CLIMATE CONTROLLED SEAT SWITCH INPUT SIGNAL
- Turn ignition switch ON.
- Check voltage between climate controlled seat switch harness connector and ground.
(+)
(-)
Condition
Voltage (V)
(Approx.)
Climate controlled seat switch
Connector
Terminal
Driver side
M204
4
Ground
Climate controlled seat switch (driver side)
COOL mode
12
Other than the above
0
5
HEAT mode
12
Other than the above
0
Passenger side
M205
4
Climate controlled seat switch (passenger side)
COOL mode
12
Other than the above
0
5
HEAT mode
12
Other than the above
0
Is the inspection result normal?
YES
GO TO 3.
NO
GO TO 2.
- CHECK CLIMATE CONTROLLED SEAT SWITCH INDICATOR CIRCUIT
- Turn ignition switch OFF.
- Disconnect climate controlled seat control unit connector and climate controlled seat switch connector.
- Check continuity between climate controlled seat control unit harness connector and climate controlled seat switch harness connector.
Climate controlled seat switch
Climate controlled seat control unit
Continuity
Connector
Terminal
Connector
Terminal
Driver side
M204
4
B660
53
Existed
5
57
Passenger side
M205
4
B662
53
5
57
- Check continuity between climate controlled seat switch harness connector and ground.
Climate controlled seat switch
Ground
Continuity
Connector
Terminal
Driver side
M204
4
Not existed
5
Passenger side
M205
4
5
Is the inspection result normal?
YES
Replace climate controlled seat control unit.
NO
Repair or replace harness.
- CHECK CLIMATE CONTROLLED SEAT SWITCH GROUND CIRCUIT
- Turn ignition switch OFF.
- Disconnect climate controlled seat switch connector.
- Check continuity between climate controlled seat switch harness connector and ground.
Climate controlled seat switch
Ground
Continuity
Connector
Terminal
Driver side
M204
6
Existed
Passenger side
M205
Is the inspection result normal?
YES
Replace climate controlled seat switch.
NO
Repair or replace harness.