Inspection Procedure

CHECK CLIMATE CONTROL SWITCH (INDICATOR)
1. Check the climate control indicator is blinking.
  
  Fig 1: Result Reference Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
B: Go to step 5

A: Go to next step
INSPECT SEAT CLIMATE CONTROLLER (THERMISTOR OF SEATBACK) (See INSPECTION )
NG: REPLACE SEAT CLIMATE CONTROLLER

OK: Go to next step.
CHECK WIRE HARNESS (SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL ECU) - SEAT CLIMATE CONTROLLER (SEATBACK))
HINT:

When the driver side indicator is blinking, check the driver side connector. When the passenger side indicator is blinking, check the passenger side connector.
1. Disconnect the C20 or C21 blower connectors.
2. Disconnect the S34 or S35 controller connectors.
3. Measure the resistance of the wire harness side connectors.
  Standard:
  
  Driver side
  
  Fig 2: Terminals Resistance Reference Chart (Driver Side)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Passenger side
  
  Fig 3: Terminals Resistance Reference Chart (Passenger Side)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 4: Checking Wire Harness (Seat Climate Control Blower (Climate Control ECU) - Seat Climate Controller (Seatback))
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: Go to next step.
CHECK WIRE HARNESS (SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL ECU) - SEAT CLIMATE CONTROLLER)
HINT:

When the driver side indicator is blinking, check the driver side connector. When the passenger side indicator is blinking, check the passenger side connector.
1. Disconnect the S48 or S49 controller connectors.
2. Measure the resistance of the wire harness side connector.
  Standard:
  
  Driver side
  
  Fig 5: Terminals Resistance Reference Chart (Driver Side)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Passenger side
  
  Fig 6: Terminals Resistance Reference Chart (Passenger Side)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 7: Checking Wire Harness (Seat Climate Control Blower (Climate Control ECU) - Seat Climate Controller)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  HINT:
  
  As the temperature increases, the resistance decreases.
NG: REPLACE SEAT CLIMATE CONTROLLER

OK: REPLACE SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL ECU)
INSPECT SEAT CLIMATE CONTROLLER (THERMISTOR OF SEATBACK) (See INSPECTION )
NG: REPLACE SEAT CLIMATE CONTROLLER

OK: Go to next step.
CHECK WIRE HARNESS (SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL ECU) - SEAT CLIMATE CONTROLLER)
HINT:

When the rear LH indicator is blinking, check the rear LH side connector. When the rear RH indicator is blinking, check the rear right RH side connector.
1. Disconnect the C28 or C30 blower connectors.
2. Disconnect the S52 or S54 controller connectors.
3. Measure the resistance of the wire harness side connectors.
  Standard:
  
  Rear LH
  
  Fig 8: Terminals Resistance Reference Chart (Rear LH)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Rear RH
  
  Fig 9: Terminals Resistance Reference Chart (Rear RH)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 10: Checking Wire Harness (Seat Climate Control Blower (Climate Control ECU) - Seat Climate Controller)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: Go to next step.
INSPECT SEAT CLIMATE CONTROLLER (THERMISTOR OF SEAT CUSHION) (See INSPECTION )
NG: REPLACE SEAT CLIMATE CONTROLLER

OK: Go to next step.
CHECK WIRE HARNESS (SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL ECU) - SEAT CLIMATE CONTROLLER)
HINT:

When the rear LH indicator is blinking, check the rear LH side connector. When the rear RH indicator is blinking, check the rear right RH side connector.
1. Disconnect the C28 or C30 blower connectors.
2. Disconnect the S53 or S55 controller connectors.
3. Measure the resistance of the wire harness side connectors.
  Standard:
  
  Rear LH
  
  Fig 11: Terminals Resistance Reference Chart (Rear LH)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Rear RH
  
  Fig 12: Terminals Resistance Reference Chart (Rear RH)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 13: Checking Wire Harness (Seat Climate Control Blower (Climate Control ECU) - Seat Climate Controller)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: Go to next step.
INSPECT SEAT HEATER (THERMISTOR) (See INSPECTION )
NG: REPLACE SEAT CUSHION PAD

OK: Go to next step.
CHECK WIRE HARNESS (SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL ECU) - SEAT HEATER)
HINT:

When the rear LH indicator is blinking, check the rear LH side connector. When the rear RH indicator is blinking, check the rear right RH side connector.
1. Disconnect the C28 or C30 blower connectors.
2. Disconnect the S60 or S61 controller connectors.
3. Measure the resistance of the wire harness side connectors.
  Standard:
  
  Rear LH
  
  Fig 14: Terminals Resistance Reference Chart (Rear LH)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Rear RH
  
  Fig 15: Terminals Resistance Reference Chart (Rear RH)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 16: Checking Wire Harness (Seat Climate Control Blower (Climate Control ECU) - Seat Heater)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: REPLACE SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL ECU)