Inspection Procedure

1. Check that the climate control indicator is blinking.
   Fig 1: Result Reference Chart

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

B: Go to step   4 

A 

NG: REPLACE CLIMATE CONTROL SWITCH 

OK: Go to next step. 

HINT:

When the indicator of driver's side is blinking, check the driver's side connector. When the indicator of passenger's side is blinking, check the passenger's 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: REPLACE SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL ECU) 

NG: REPLACE CLIMATE CONTROL SWITCH 

OK: Go to next step. 

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. Measure the resistance of the wire harness side connector.

   Standard: 

   Rear LH 

   Fig 5: Terminals Resistance Reference Chart (Rear LH)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Rear RH 

   Fig 6: Terminals Resistance Reference Chart (Rear RH)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   Fig 7: 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: REPLACE SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL ECU)