DTC P0070-15: Ambient Temperature Sensor Circuit Short to Battery or Open [10/2022 - ]: Procedure

Pre-procedure1

• Disconnect the A11 ambient temp. sensor (thermistor assembly) connector.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *a	Front view of wire harness connector (to Ambient Temp. Sensor (Thermistor Assembly))

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

  Standard Voltage

  Tester Connection	Condition	Specified Condition	Result
  A11-2 (+) - 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 A11 ambient temp. sensor (thermistor assembly) connector.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *a	Front view of wire harness connector (to Ambient Temp. Sensor (Thermistor Assembly))

• Connect terminals 1 and 2 of the ambient temp. sensor (thermistor assembly) connector on the wire harness side.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *1	Ambient Temp. Sensor (Thermistor Assembly)
  *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
  P0070-11 is output	A
  P0070-15 is output	B

Post-procedure1

• None

Result: 

A 

REPLACE AMBIENT TEMP. SENSOR (THERMISTOR ASSEMBLY). Refer to  REMOVAL [10/2022 - ] 

Result: 

B 

See step  4

Pre-procedure1

• Disconnect the A11 ambient temp. sensor (thermistor assembly) connector.
• Disconnect the C48 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
  A11-2 (+) - C48-1 (TAM)	Always	Below 1 Ω	Ω
  A11-1 (-) - C48-14 (SG-2)	Always	Below 1 Ω	Ω

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

OK 

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Pre-procedure1

• Disconnect the A11 ambient temp. sensor (thermistor assembly) connector.
• Disconnect the C48 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
  A11-2 (+) or C48-1 (TAM) - 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 [10/2022 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR