DTC B147D-15: Rear Right Room Temperature Sensor Circuit Short to Battery or Open [12/2023 - ]: Procedure

Pre-procedure1

• Disconnect the I8 No. 2 room temp. sensor (cooler thermistor) connector.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *a	Front view of wire harness connector (to No. 2 Room Temp. Sensor (Cooler Thermistor))

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

  Standard Voltage

  Tester Connection	Condition	Specified Condition	Result
  I8-1 (+) - Body ground	Ignition switch ON	0 to 5.5 V	V

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

NG 

See step  5

Result: 

OK 

See step  2

1. Clear the DTCs.

   Body Electrical > Air Conditioner > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  3

Pre-procedure1

• Turn the ignition switch off.
• Disconnect the I8 No. 2 room temp. sensor (cooler thermistor) connector.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *a	Front view of wire harness connector (to No. 2 Room Temp. Sensor (Cooler Thermistor))

• Connect terminals 1 and 2 of the No. 2 room temp. sensor (cooler thermistor) connector on the wire harness side.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *1	No. 2 Room Temp. Sensor (Cooler Thermistor)
  *2	Air Conditioning Amplifier Assembly

• Turn the ignition switch to ON and wait for 4 seconds or more.

• Check for DTCs.

  Body Electrical > Air Conditioner > Trouble Codes 

  Result

  Result	Proceed to
  B147D-11 is output	A
  B147D-15 is output	B

Post-procedure1

• None

Result: 

A 

REPLACE NO. 2 ROOM TEMP. SENSOR (COOLER THERMISTOR). Refer to  REMOVAL [09/2023 - ] 

Result: 

B 

See step  4

Pre-procedure1

• Disconnect the I8 No. 2 room temp. sensor (cooler thermistor) connector.
• Disconnect the D37 air conditioning amplifier assembly connector.

• Measure the resistance according to the value(s) in the table below.

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  I8-1 (+) - D37-8 (RRTR)	Always	Below 1 Ω	Ω
  I8-2 (-) - D37-14 (SG-8)	Always	Below 1 Ω	Ω

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

OK 

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [09/2023 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Pre-procedure1

• Disconnect the I8 No. 2 room temp. sensor (cooler thermistor) connector.
• Disconnect the D37 air conditioning amplifier assembly connector.

• Measure the resistance according to the value(s) in the table below.

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  I8-1 (+) or D37-8 (RRTR) - Other terminals and body ground	Always	10 kΩ or higher	kΩ

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

OK 

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [09/2023 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR