Inspection Procedure

CHECK CLIMATE CONTROL SWITCH (INDICATOR)
1. Check that the climate indicator is blinking.
  
  Fig 1: Result Reference Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
B: Go to step 8

A: Go to next step
INSPECT CLIMATE CONTROL SWITCH (FRONT) (See INSPECTION )
NG: REPLACE CLIMATE CONTROL SWITCH

OK: Go to next step.
CHECK WIRE HARNESS (SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL ECU) - CLIMATE CONTROL SWITCH)
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. Measure the resistance of the wire harness side connector.
  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) - Climate Control Switch)
  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) - BODY GROUND)
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. Measure the voltage of the wire harness side connector.
  Standard:
  
  Driver side
  
  Fig 5: Terminals Voltage Reference Chart (Driver side)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Passenger side
  
  Fig 6: Terminals Voltage Reference Chart (Passenger Side)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 7: Checking Wire Harness (Seat Climate Control Blower (Climate Control ECU) - Body Ground)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPLACE SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL ECU)

OK: Go to next step.
INSPECTION SEAT CLIMATE CONTROLLER SWITCH (THERMISTOR OF SEAT-BACK) (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 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 8: Terminals Resistance Reference Chart (Driver Side)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Passenger side
  
  Fig 9: Terminals Resistance Reference Chart (Passenger Side)
  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.
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 11: Terminals Resistance Reference Chart (Driver Side)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Passenger side
  
  Fig 12: Terminals Resistance Reference Chart (Passenger Side)
  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
  
  HINT:
  
  As the temperature increases, the resistance decreases.
NG: REPLACE SEAT CLIMATE CONTROLLER

OK: REPLACE SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL ECU)
INSPECT CLIMATE CONTROL SWITCH (REAR) (See INSPECTION )
NG: REPLACE CLIMATE CONTROL SWITCH

OK: Go to next step.
CHECK WIRE HARNESS (SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL ECU) - CLIMATE CONTROL SWITCH)
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 C27 or C29 blower connectors.
2. Measure the resistance of the wire harness side connector.
  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) - Climate Control Switch)
  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) - BODY GROUND)
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. Measure the voltage of the wire harness side connector.
  Standard:
  
  Rear LH
  
  Fig 17: Terminals Voltage Reference Chart (Rear LH)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Rear RH
  
  Fig 18: Terminals Voltage Reference Chart (Rear RH)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 19: Checking Wire Harness (Seat Climate Control Blower (Climate Control ECU) - Body Ground)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPLACE SEAT CLIMATE BLOWER (CLIMATE CONTROL ECU)

OK: 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)
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 connector.
  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
  
  Fig 22: 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 23: Terminals Resistance Reference Chart (Rear LH)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Rear RH
  
  Fig 24: Terminals Resistance Reference Chart (Rear RH)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 25: 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)
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 S60 or S61 heater connector.
2. Check the resistance between the terminals of the heater.
  Standard:
  
  Rear LH
  
  Fig 26: Terminals Resistance Reference Chart (Rear LH)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Rear RH
  
  Fig 27: Terminals Resistance Reference Chart (Rear RH)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 28: Inspecting Seat Heater (Thermistor)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPLACE SEAT HEATER

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 heater connectors.
3. Measure the resistance of the wire harness side connectors.
  Standard:
  
  Rear LH
  
  Fig 29: Terminals Resistance Reference Chart (Rear LH)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Rear RH
  
  Fig 30: Terminals Resistance Reference Chart (Rear RH)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 31: 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)