Inspection Procedure

CHECK CLIMATE CONTROL SWITCH (INDICATOR)
1. Check that 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
CHECK 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 S34 or S35 controller connector.
2. Connect the wire harness to terminal 4 (TDB-) and 5 (TDB+) of the wire harness side connector.
3. Turn the ignition switch ON.
4. Turn the climate control switch ON, then check that the climate control indicator continues blinking.
  
  Fig 2: Result Reference Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
B: REPAIR SEAT CLIMATE CONTROLLER (SEAT-BACK)

Fig 3: Checking Seat Climate Controller (Seatback)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

A: Go to next step
CHECK WIRE HARNESS (SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL ECU) - 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 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 4: Terminals Resistance Reference Chart (Driver Side)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Passenger side
  
  Fig 5: Terminals Resistance Reference Chart (Passenger Side)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

Fig 6: Checking Wire Harness (Seat Climate Control Blower (Climate Control ECU) - Climate Controller)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step
CHECK SEAT CLIMATE CONTROLLER (SEAT CUSHION)
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 connectors.
2. Connect terminal 3 (TDC+) and 6 (TDC-) of the climate control ECU connector, as shown in the illustration.
3. Turn the ignition switch ON.
4. Turn the climate control switch ON, and then check that the climate control switch indicator turns off.
OK: The indicator turns off

OK: REPAIR SEAT CLIMATE CONTROLLER (SEAT CUSHION)

Fig 7: Checking Seat Climate Controller (Seat Cushion)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG

REPAIR SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL ECU)
CHECK SEAT CLIMATE CONTROLLER (SEATBACK)
HINT:

When the rear LH indicator is blinking, check the rear LH connector. When the rear RH indicator is blinking, check the rear RH connector.
1. Disconnect the S52 or S54 controller connectors.
2. Connect the wire harness to terminal 4 (TDB-) and 5 (TDB+) of the wire harness side connector.
3. Turn the ignition switch ON.
4. Turn the climate control switch ON, and then check that the climate control indicator continues blinking.
  
  Fig 8: Result Reference Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
B: REPAIR SEAT CLIMATE CONTROLLER (SEAT-BACK)

Fig 9: Checking Seat Climate Controller (Seatback)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

When the rear LH indicator is blinking, check the rear LH connector. When the rear RH indicator is blinking, check the rear RH 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 10: Terminals Resistance Reference Chart (Rear LH)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Rear RH
  
  Fig 11: Terminals Resistance Reference Chart (Rear RH)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

Fig 12: Checking Wire Harness (Seat Climate Control Blower (Climate Control ECU) - Seat Climate Controller (Seatback))
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step.
CHECK SEAT CLIMATE CONTROLLER (SEAT CUSHION)
HINT:

When the rear LH indicator is blinking, check the rear LH connector. When the rear RH indicator is blinking, check the rear RH connector.
1. Disconnect the S53 or S55 blower connectors.
2. Connect the wire harness to terminal 5 (TDC+) and 4 (TDC-) of the wire harness side connector, as shown in the illustration.
3. Turn the ignition switch ON.
4. Turn the climate control switch ON, and then check that the climate control indicator turns off.
OK:

The indicator turns off

NG: REPAIR SEAT CLIMATE CONTROLLER (SEAT CUSHION)

Fig 13: Checking Seat Climate Controller (Seat Cushion)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

When the rear LH indicator is blinking, check the rear LH connector. When the rear RH indicator is blinking, check the room RH connector.
1. Disconnect the C28 or C30 blower connectors.
2. Disconnect the S53 or S55 controller connectors.
3. Measure the resistance of between 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 LH)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 16: Checking Wire Harness (Seat Climate Control Blower (Climate Control ECU) - Seat Climate Controller (Seat Cushion))
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

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

OK: Go to next step.
INSPECT SEAT HEATER (SEAT CUSHION) (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 indicator of rear left side is blinking, check the rear left side connector. When the indicator of rear right side is blinking, check the rear right side connector.
1. Disconnect the C28 or C30 blower and S60 or S61 heater connectors.
2. Measure the resistance of the wire harness side connectors.
  Standard:
  
  Rear LH
  
  Fig 17: Terminals Resistance Reference Chart (Rear LH)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Rear RH
  
  Fig 18: Terminals Resistance Reference Chart (Rear RH)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

Fig 19: Checking Wire Harness (Seat Climate Control Blower (Climate Control ECU) - Seat Heater)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step.
INSPECT SEAT CLIMATE CONTROL BLOWER (FAN MOTOR OF SEATBACK) (See INSPECTION )
NG: REPLACE SEAT CLIMATE CONTROL BLOWER (SEATBACK)

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

When the indicator of rear left side is blinking, check the rear left side connector. When the indicator of rear right side is blinking, check the rear right side connector.
1. Disconnect the C27 or C29 blower connectors.
2. Disconnect the S56 or S58 motor connectors.
3. Measure the resistance of the wire harness side connectors.
  Standard:
  
  Rear LH
  
  Fig 20: Terminals Resistance Reference Chart (Rear LH)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Rear RH
  
  Fig 21: Terminals Resistance Reference Chart (Rear RH)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

Fig 22: Checking Wire Harness (Seat Climate Control Blower (Climate Control ECU) - Seat Climate Fan Motor)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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