Diagnosis Procedure
- CHECK CLIMATE CONTROLLED SEAT CONTROL UNIT INPUT SIGNAL
- Turn ignition switch ON.
- Check voltage between climate controlled seat control unit harness connector and ground.
(+)
(-)
Condition
Voltage (V)
(Approx.)
Climate controlled seat control unit
Connector
Terminal
Driver side
B660
56
Ground
Climate controlled seat switch (driver side)
COOL
HI
2.6 - 4.2
MID
1.6 - 2.5
LO
0.8 - 1.5
OFF
0
54
HEAT
HI
2.6 - 4.2
MID
1.6 - 2.5
LO
0.8 - 1.5
OFF
0
Passenger side
B662
56
Climate controlled seat switch (passenger seat)
COOL
HI
2.6 - 4.2
MID
1.6 - 2.5
LO
0.8 - 1.5
OFF
0
54
HEAT
HI
2.6 - 4.2
MID
1.6 - 2.5
LO
0.8 - 1.5
OFF
0
Is the inspection result normal?
YES
INSPECTION END
NO
GO TO 2.
NO
GO TO 3.
- CHECK CLIMATE CONTROLLED SEAT SWITCH CIRCUIT
- Turn ignition switch OFF.
- Disconnect climate controlled seat switch connector and climate controlled seat control unit connector.
- Check continuity between climate controlled seat switch harness connector and climate controlled seat control unit harness connector.
Climate controlled seat switch
Climate controlled seat control unit
Continuity
Connector
Terminal
Connector
Terminal
Driver side
COOL
M204
2
B660
56
Existed
HEAT
3
54
Passenger side
COOL
M205
2
B662
56
HEAT
3
54
- Check continuity between climate controlled seat switch harness connector and ground.
Climate controlled seat switch
Ground
Continuity
Connector
Terminal
Driver side
COOL
M204
2
Not existed
HEAT
3
Passenger side
COOL
M205
2
HEAT
3
Is the inspection result normal?
YES
GO TO 5.
NO
Repair or replace harness.
- CHECK CLIMATE CONTROLLED SEAT SWITCH POWER SUPPLY
- Turn ignition switch OFF.
- Disconnect climate controlled seat switch connector.
- Turn ignition switch ON.
- Check voltage between climate controlled seat switch harness connector and ground.
(+)
(-)
Voltage (V)
(Approx.)
Climate controlled seat switch
Connector
Terminal
Driver side
M204
1
Ground
12
Passenger side
M205
Is the inspection result normal?
YES
GO TO 5.
NO
GO TO 4.
- CHECK CLIMATE CONTROLLED SEAT SWITCH POWER SUPPLY CIRCUIT
- Turn ignition switch OFF.
- Disconnect climate controlled seat control unit connector.
- Check continuity between climate controlled seat switch harness connector and climate controlled seat control unit harness connector.
Climate controlled seat switch
Climate controlled seat control unit
Continuity
Connector
Terminal
Connector
Terminal
Driver side
M204
1
B660
52
Existed
Passenger side
M205
B662
- Check continuity between climate controlled seat switch harness connector and ground.
Climate controlled seat switch
Ground
Continuity
Connector
Terminal
Driver side
M204
1
Not existed
Passenger side
M205
Is the inspection result normal?
YES
Replace climate controlled seat control unit.
NO
Repair or replace harness.
- CHECK CLIMATE CONTROLLED SEAT SWITCH
Check climate controlled seat switch.
Refer to Component Inspection .
Is the inspection result normal?
YES
GO TO 6.
NO
Replace climate controlled seat switch.
- CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident .
INSPECTION END