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SE-124
CLIMATE CONTROLLED SEAT
Revision: 2006 January2006 M35/M45
Work FlowNIS0027M
1. Check the symptom and customer's requests.
2. Understand the outline of system. Refer to SE-113, "
System Description" .
3. Perform the preliminary check. Refer toSE-124, "
Preliminary Check" .
4. According to the trouble diagnosis chart, repair or replace the cause of the malfunction. Refer to SE-125,
"Trouble Diagnoses Symptom Chart" .
5. Does climate controlled seat operate normally? YES: GO TO 6, NO: GO TO 4.
6. INSPECTION END.
Preliminary CheckNIS0027N
1. CHECK DUCT AND FILTER
Check the following.
Is that there no foreign body in the blower motor filter.
Is that there no foreign body in the duct.
OK or NG
OK >> Preliminary check is OK.
NG >> The foreign body is removed.
21 GR/LSeat cushion thermal electric
device sensor groundIgnition switch ON 0
22 GR/RSeat cushion thermal electric
device sensor signalBlower motor operated 0.5 – 4
Ignition switch OFF 0
23 L/RSeatback thermal electric
device sensor signalBlower motor operated 0.5 – 4
Ignition switch OFF 0
24 LSeatback thermal electric
device sensor groundIgnition switch ON 0 TerminalWire
ColorItem ConditionVoltage (V)
(Approx)
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CLIMATE CONTROLLED SEAT
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Revision: 2006 January2006 M35/M45
Trouble Diagnoses Symptom ChartNIS0027O
NOTE:
Make sure other systems using the signal of the following systems operate normally.
NOTE:
The climate controlled seat blower keep low speed for approximately 60 seconds turning the switch.
The climate controlled seat system is downed when the temperature sensor set as the seat cushion and
the seatback's thermal electric device machine detects 20
C (68F) or more of mutual differences of tem-
perature.
Symptom Diagnoses / service procedureRefer to
page
Climate controlled seat do not operate (Neither the driver's
side nor passenger's side operate).1. Climate controlled seat control unit power supply cir-
cuit check.SE-126
All the driver side or passenger side climate controlled
seat do not operate.1. Climate controlled seat control unit power supply and
ground circuit inspection.SE-1272. Climate controlled seat switch power supply circuit
inspectionSE-130
3. Climate controlled seat blower motor circuit inspection.SE-140
4. Replace climate controlled seat control unit.SE-113
Climate controlled seat blower motor speed cannot adjust.1. Climate controlled seat switch power supply circuit
inspectionSE-1302. Climate controlled seat switch circuit inspectionSE-131
3. Climate controlled seat control unit inspection.SE-142
4. Replace climate controlled seat blower motor.SE-113
The climate controlled seat dose not operates when the
switch is done in HEAT or COOL.Climate controlled seat switch circuit inspection.SE-131
When the climate controlled seat switch is turned on,
operation stops at nose (When the climate controlled seat
switch is in HEAT or COOL mode after ignition switch is
turned ON again, the motor operates).1. Seat cushion thermal electric device sensor circuit
inspection.SE-1372. Seat cushion thermal electric device circuit inspectionSE-135
3. Seatback thermal electric device sensor circuit inspec-
tion.SE-139
4. Seatback thermal electric device circuit inspectionSE-136
5. Climate controlled seat blower motor circuit inspection.SE-140
6. Replace Climate controlled seat control unitSE-113
The climate controlled seat switch indicator do not oper-
ated with HEAT or COOL positionClimate controlled seat switch indicator circuit inspectionSE-133
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SE-126
CLIMATE CONTROLLED SEAT
Revision: 2006 January2006 M35/M45
Climate Controlled Seat Control Unit Power Supply Circuit CheckNIS0027P
1. CHECK FUSE
Check 10A fuse [No. 12, located in fuse block (J/B)]
NOTE:
Refer to SE-113, "
Component Parts and Harness Connector Location" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse, refer to PG-
3, "POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK CLIMATE CONTROLLED SEAT RELAY POWER SUPPLY CIRCUIT
1. Disconnect climate controlled seat relay connector.
2. Turn ignition switch ON.
3. Check voltage between climate controlled seat relay harness
connector and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness between fuse block (J/B) and
climate controlled seat relay.
3. CHECK CLIMATE CONTROLLED SEAT RELAY
Check continuity climate controlled seat relay.
OK or NG
OK >> GO TO 4.
NG >> Replace climate controlled seat relay.
Terminal
Voltage (V)
(Approx.) (+)
(–)
Climate controlled
seat relay connectorTerminal
E16 2 Ground Battery voltage
PIIB6067E
Climate controlled
seat relay connectorTerminal Condition Continuity
E163512V direct current
supply between
terminals 1and 2Ye s
No current supply No
6712V direct current
supply between
terminals 1and 2Ye s
No current supply No
SEC202B
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CLIMATE CONTROLLED SEAT
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Revision: 2006 January2006 M35/M45
4. CHECK CLIMATE CONTROLLED SEAT RELAY GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between climate controlled seat relay connec-
tor and ground.
OK or NG
OK >> Check the condition of the harness and connector.
NG >> Repair or replace harness between climate controlled
seat relay and ground.
Climate Controlled Seat Control Unit Power Supply and Ground Circuit Inspec-
tion
NIS0027Q
1. CHECK CLIMATE CONTROLLED SEAT CONTROL UNIT POWER SUPPLY CIRCUIT
1. Disconnect climate controlled seat control unit connector.
2. Turn ignition switch ON.
3. Check voltage between climate controlled seat control unit con-
nector and ground.
OK or NG
OK >> GO TO 6.
NG >> GO TO 2.
2. CHECK FUSE
Check 15A fuse [No. 42, located in fuse, fusible link and relay unit] (Driver side)
Check 15A fuse [No. 41, located in fuse, fusible link and relay unit] (Passenger side)
NOTE:
Refer to SE-113, "
Component Parts and Harness Connector Location" .
OK or NG
OK >> GO TO 3.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse, refer to PG-
3, "POWER SUPPLY ROUTING CIRCUIT" .
Terminal
Continuity
Climate controlled
seat relay connectorTerminal
Ground
E16 1 Yes
PIIB6068E
Terminal
Voltage (V)
(Approx.) (+)
(–)
Climate controlled seat
control unit connectorTerminal
B284
(driver side)
B294
(passenger side)2
Ground Battery voltage
4
PIIB6069E
Page 5309 of 5621
SE-128
CLIMATE CONTROLLED SEAT
Revision: 2006 January2006 M35/M45
3. CHECK CLIMATE CONTROLLED SEAT RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect climate controlled seat relay.
3. Check voltage between climate controlled seat relay connector
and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness between climate controlled seat relay and ground.
4. CHECK CLIMATE CONTROLLED SEAT RELAY
Check continuity climate controlled seat relay.
OK or NG
OK >> GO TO 5.
NG >> Replace climate controlled seat relay.
Terminal
Voltage (V)
(Approx.) (+)
(–)
Climate controlled
seat relay connectorTe r m i n a l
E165
Ground Battery voltage
7
PIIB6070E
Climate controlled
seat relay connectorTerminal Condition Continuity
E163512V direct current
supply between
terminals 1and 2Ye s
No current supply No
6712V direct current
supply between
terminals 1and 2Ye s
No current supply No
SEC202B
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CLIMATE CONTROLLED SEAT
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5. CHECK CLIMATE CONTROLLED SEAT CONTROL UNIT HARNESS CIRCUIT
1. Check continuity between climate controlled seat control unit
connector and climate controlled seat relay connector.
2. Check continuity between climate controlled seat control unit connector and ground.
OK or NG
OK >> Check the condition of the harness and connector.
NG >> Repair or replace harness between climate controlled seat control unit and climate controlled seat
relay.
6. CHECK CLIMATE CONTROLLED SEAT CONTROL UNIT GROUND CIRCUIT
Check continuity between climate controlled seat control unit con-
nector and ground.
OK or NG
OK >> Climate controlled seat control unit power supply and ground circuit is OK.
NG >> Repair or replace harness between climate controlled seat control unit and ground.
AB
Continuity Climate controlled
seat control unit
connectorTerminalClimate controlled
seat relay
connectorTerminal
B284
(driver side)2
E166
Ye s 4
B294
(passenger side)2
3
4
A
GroundContinuity Climate controlled
seat control unit
connectorTe r m i n a l
B284 (driver side)
B294 (passenger side)2
No
4
PIIB6071E
Terminal Continuity
Climate controlled
seat control unit
connectorTerminal
Ground Yes
B284
(driver side)
B294
(passenger side)3
PIIB6072E
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SE-130
CLIMATE CONTROLLED SEAT
Revision: 2006 January2006 M35/M45
Climate Controlled Seat Switch Power Supply Circuit InspectionNIS0027R
1. CHECK CLIMATE CONTROLLED SEAT CONTROL UNIT POWER SUPPLY
1. Turn ignition switch ON.
2. Check voltage between climate controlled seat control unit and
ground.
OK or NG
OK >> GO TO 2.
NG >> Replace climate controlled seat control unit.
2. CHECK CLIMATE CONTROLLED SEAT SWITCH POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect climate controlled seat control unit and climate controlled seat switch connector.
3. Check continuity between climate controlled seat control unit
connector and climate controlled seat switch connector.
–Driver side
–Passenger side
4. Check continuity between climate controlled seat control unit
connector and ground.
OK or NG
OK >> Climate controlled seat control unit power supply circuit is OK.
NG >> Repair or replace harness between climate controlled seat control unit and climate controlled seat
switch.
Terminal
Voltage (V)
(Approx.) (+)
(–) Climate controlled
seat control unit
connectorTerminal
B283
(driver side)
B293
(passenger side)11 Ground Battery voltage
PIIB6073E
AB
Continuity Climate controlled
seat control unit
connectorTerminalClimate controlled
seat switch
connectorTe r m i n a l
B283 11 E20 1 Yes
AC
Continuity Climate controlled
seat control unit
connectorTerminalClimate controlled
seat switch
connectorTerminal
B293 11 E19 1 Yes
A
GroundContinuity Climate controlled
seat control unit
connector
11
B283 (driver side)
B293 (passenger side)No
PIIB6074E
Page 5312 of 5621
CLIMATE CONTROLLED SEAT
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Revision: 2006 January2006 M35/M45
Climate Controlled Seat Switch Circuit InspectionNIS0027S
1. CHECK CLIMATE CONTROLLED SEAT SWITCH
1. Turn ignition switch OFF.
2. Disconnect climate controlled seat switch connector.
3. Check continuity between climate controlled seat switch.
OK or NG
OK >> GO TO 2.
NG >> Replace climate controlled seat switch.
Climate
controlled seat
switch connectorTerminal Condition Continuity
B20
(driver side)*
B19
(passenger side)13Climate controlled
seat switchH E AT Ye s
Other than above. No
2Climate controlled
seat switchCOOL Yes
Other than above. No
PIIB6075E