Climate Control System does not Operate on Driver Side [12/2017 - 10/2022]: Procedure

1. Check the climate control seat operation.

   Refer to ON-VEHICLE INSPECTION [12/2017 - 10/2022] 

   Result

   Result	Proceed to
   Only seatback climate control blower (driver seat) does not operate	A
   Only seat cushion climate control blower assembly (driver seat) does not operate	B
   Both climate control blowers (driver seat) do not operate	C

Result: 

B 

REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY (DRIVER SEAT). Refer to  DISASSEMBLY [12/2017 - 10/2023] 

Result: 

C 

See step  5

Result: 

A 

See step  2

1. Disconnect the Q32 seat cushion climate control blower assembly LH connector.
2. Disconnect the S13 seatback climate control blower LH connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Q32-5 (CTB) - S13-1 (IG)	Always	Below 1 Ω
   Q32-5 (CTB) or S13-1 (IG) - Other terminals and body ground	Always	10 kΩ or higher
   Q32-6 (BBS) - S13-3 (BFB+)	Always	Below 1 Ω
   Q32-6 (BBS) or S13-3 (BFB+) - Other terminals and body ground	Always	10 kΩ or higher
   Q32-4 (BFB) - S13-4 (GND)	Always	Below 1 Ω
   Q32-4 (BFB) or S13-4 (GND) - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Temporarily replace the seatback climate control blower (driver seat) with a new or known good one.

   Refer to DISASSEMBLY [12/2017 - 10/2023]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  4

1. Check the climate control seat operation again.

   Refer to ON-VEHICLE INSPECTION [12/2017 - 10/2022] 

   OK

   The climate control seat operates normally.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (SEATBACK CLIMATE CONTROL BLOWER (DRIVER SEAT) WAS DEFECTIVE) 

Result: 

NG 

REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY (DRIVER SEAT). Refer to  DISASSEMBLY [12/2017 - 10/2023] 

1. Disconnect the Q32 seat cushion climate control blower assembly LH connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Q32-8 (GND) - Body ground	Always	Below 1 Ω

3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   Q32-1 (IG) - Body ground	Engine switch on (IG)	11 to 14 V
   	Engine switch off	Below 1 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  6

1. Disconnect the G65 air conditioning amplifier assembly connector.
2. Disconnect the Q32 seat cushion climate control blower assembly LH connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G65-24 (LOUT) - Q32-7 (SIGN)	Always	Below 1 Ω
   G65-24 (LOUT) or Q32-7 (SIGN) - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  7

1. Check for pulses according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (Air Conditioning Amplifier Assembly)

   MEASUREMENT CONDITION
   
   

   Item	Content
   Tester Connection	G65-24 (LOUT) - Body ground
   Tool Setting	1 V/DIV., 1 ms/DIV.
   Vehicle Condition	Engine switch on (IG) Ventilation volume switch LH on

   OK

   Waveform is similar to that shown in the illustration.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY (DRIVER SEAT). Refer to  DISASSEMBLY [12/2017 - 10/2023] 

Result: 

NG 

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [12/2017 - ]