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Fig. 71: Identifying Clearance Warning ECU Assy Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go To Next Step.
3.REPLACE CLEARANCE WARNING BUZZER NO.2
a. Replace clearance warning buzzer No.2 with a new one.
b. Check clearance warning buzzer No.2.
Perform ACTIVE TEST following the same procedure as for step 1.
OK: Malfunction disappears (Clearance warning buzzer No.2 sounds).
OK: NORMAL
NG: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS
TABLE
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FRONT POWER SEAT CONTROL SYSTEM INDEX
System NameSee Procedure
Front Power Seat Control SystemINITIALIZATION
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Fig. 1: Locating Climate Control Seat System Components (1 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
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Fig. 2: Locating Climate Control Seat System Components (2 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
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Fig. 3: Climate Control Seat System Diagram
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COMMUNICATION
1.GENERAL
The climate control seat system creates cold or warm air to increase the comfort of seats that have
become hot or cold.
The air is heated or cooled by the Peltier element on the back of the seat cushion pad and seatback. The
air is then sent to the seat cushion and seatback with the fan installed under the seat. The fan is operated
by pressing the climate control seat switch.
The climate control seat switch has several modes that vary the quantity of air to be sent to the seat. There
are 7 modes in total: 3 cooled air modes, 3 heated air modes and ventilation mode.
HINT:
When the highest level for cooled air operates for 15 minutes, the quantity of air falls 1 level.
2.FUNCTION OF MAIN COMPONENT
Fig. 4: Main Component Function Table
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3.SYSTEM OPERATION
SenderReceiverSignalLine
Climate control ECUECMIdle-up signalBEAN (Door bus), CAN
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Fig. 5: System Operation Chart (1 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Fig. 6: System Operation Chart (2 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
HINT
Use this procedure to troubleshoot the climate control seat system.
The hand-held tester should be used in step 3.
1.VEHICLE BROUGHT TO WORKSHOP
2.CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK (See CUSTOMER