DTC P15B9-62: Ambient Temperature Sensor / Ambient Temperature Sensor "B" Signal Compare Failure [12/2023 - ]: Procedure

1. Check if air conditioning system DTCs are output.

   Body Electrical > Air Conditioner > Trouble Codes 

   HINT: 

   Check even when the DTCs detected for temporary failures.

   Result

   Result	Proceed to
   No DTCs in the table below are output	A
   Any of the DTCs in the table below are output	B

   Relevant DTC
   P0070-11	Ambient Temperature Sensor Circuit Short to Ground
   P0070-15	Ambient Temperature Sensor Circuit Short to Battery or Open
   P00D9-11	Ambient Temperature Sensor "B" Circuit Short to Ground
   P00D9-15	Ambient Temperature Sensor "B" Circuit Short to Battery or Open

Result: 

B 

GO TO DIAGNOSTIC TROUBLE CODE CHART (AIR CONDITIONING SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2023 - ] 

Result: 

A 

See step  2

Pre-procedure1

• Place the thermometer in a well-ventilated location in the shade.
• Move the vehicle to a well-ventilated location in the shade.
• Blower switch turned off.
• Wait for 1 hour after turning the ignition switch off.

• Read the Data List according to the display on the GTS.

  Body Electrical > Air Conditioner > Data List 

  Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
  Ambient Temperature Sensor	Ambient temp. sensor (thermistor assembly)	-327.68 to 327.67°C	Actual ambient temperature displayed	Ambient temp. sensor (thermistor assembly) circuit malfunction
  Ambient Temperature Sensor "B"	No. 2 ambient temp. sensor (thermistor assembly)	-327.68 to 327.67°C	Actual ambient temperature displayed	No. 2 ambient temp. sensor (thermistor assembly) circuit malfunction

  Body Electrical > Air Conditioner > Data List 

  Tester Display
  Ambient Temperature Sensor
  Ambient Temperature Sensor "B"

• Compare the values displayed in the Data List and on the manifold gauge set.

  Result

  Result	Proceed to
  The Data List value for the cooler ambient temp. sensor (thermistor assembly) does not match the value of the thermometer	A
  The Data List value for the No. 2 ambient temp. sensor (thermistor assembly) does not match the value of the thermometer	B
  Data List values and thermometer values match	C

Post-procedure1

• None

Result: 

B 

See step  5

Result: 

C 

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

Result: 

A 

See step  3

Refer to INSPECTION [09/2023 - ]

Result

Result: 

NG 

REPLACE AMBIENT TEMP. SENSOR (THERMISTOR ASSEMBLY). Refer to  REMOVAL [12/2023 - ] 

Result: 

OK 

See step  4

Pre-procedure1

• Disconnect the D35 air conditioning amplifier assembly connector.
• Disconnect the B13 ambient temp. sensor (thermistor assembly) connector.

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

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  D35-1 (TAM) - B13-1 (+)	Always	Below 1 Ω	Ω
  D35-14 (SG-2) - B13-2 (-)	Always	Below 1 Ω	Ω
  D35-1 (TAM) or B13-1 (+) - Other terminals and body ground	Always	10 kΩ or higher	kΩ
  D35-14 (SG-2) or B13-2 (-) - 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 

Refer to INSPECTION [09/2023 - ]

Result

Result: 

NG 

REPLACE NO. 2 AMBIENT TEMP. SENSOR (THERMISTOR ASSEMBLY). Refer to  REMOVAL [12/2023 - ] 

Result: 

OK 

See step  6

Pre-procedure1

• Disconnect the D35 and D37 air conditioning amplifier assembly connector.
• Disconnect the B87 No. 2 ambient temp. sensor (thermistor assembly) connector.

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

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  D37-10 (TAMB) - B87-1 (+)	Always	Below 1 Ω	Ω
  D35-14 (SG-2) - B87-2 (-)	Always	Below 1 Ω	Ω
  D37-10 (TAMB) or B87-1 (+) - Other terminals and body ground	Always	10 kΩ or higher	kΩ
  D35-14 (SG-2) or B87-2 (-) - 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