Dtc B1429/29 Rear Air Foot Duct Sensor Circuit On Front Passenger Side

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING INTELLIGENT TESTER (AIR DUCT TEMPERATURE SENSOR)

CHECK AIR DUCT TEMPERATURE SENSOR

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - AIR DUCT TEMPERATURE SENSOR)

DESCRIPTION

HINT:

*1: for LHD

*2: for RHD

WIRING DIAGRAM

INSPECTION PROCEDURE

1. Use the Data List to check if the air duct temperature sensor RH*1 or LH*2 (for front passenger side) is functioning properly.
   
   

   Air Conditioner

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Foot Duct Sensor (Rear P)	Min.: -12.7°C (9.14°F) Max.: 76.55°C (169.79°F)	Actual air duct temperature sensor (for passenger side) displayed	Open in the circuit: -12.7°C (9.14°F) Short in the circuit: 76.55°C (169.79°F)

   HINT:

   *1: for LHD

   *2: for RHD

   OK:

   The display is as specified in the normal condition.
   

1. for LHD
   

   1. Remove the air duct temperature sensor RH (Click here).
      

2. for RHD
   

   1. Remove the air duct temperature sensor LH (Click here).
      

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   1 (+) - 2 (-)	at 10°C (50°F)	9.4 to 10.5 kΩ
   	at 15°C (59°F)	7.5 to 8.3 kΩ
   	at 20°C (68°F)	6.0 to 6.5 kΩ
   	at 25°C (77°F)	4.5 to 5.2 kΩ
   	at 30°C (86°F)	3.8 to 4.2 kΩ
   	at 35°C (95°F)	3.1 to 3.4 kΩ
   	at 40°C (104°F)	2.5 to 2.8 kΩ
   	at 45°C (113°F)	2.0 to 2.3 kΩ
   	at 50°C (122°F)	1.6 to 2.0 kΩ
   	at 55°C (131°F)	1.3 to 1.6 kΩ
   	at 60°C (140°F)	1.1 to 1.4 kΩ

   NOTICE:

   1. Touching the sensor even slightly may change the resistance value. Hold the connector of the sensor.
      
   2. When measuring the resistance, the sensor temperature must be the same as the ambient temperature.
      

   HINT:

   As the temperature increases, the resistance decreases (see the graph).

   If the resistance value is not as specified, replace the sensor.

   Result

   Result	Proceed to
   OK	A
   NG (for LHD)	B
   NG (for RHD)	C

1. for LHD
   

   1. Disconnect the L12 sensor connector.
      

   2. Disconnect the E35 amplifier connector.
      

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

      Standard Resistance:

      Tester Connection	Condition	Specified Condition
      E35-26 (TR4) - L12-1 (+)	Always	Below 1 Ω
      E35-12 (SG-9) - L12-2 (-)
      E35-26 (TR4) - Body ground	Always	10 kΩ or higher
      E35-12 (SG-9) - Body ground

2. for RHD
   

   1. Disconnect the K21 sensor connector.
      

   2. Disconnect the E35 amplifier connector.
      

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

      Standard Resistance:

      Tester Connection	Condition	Specified Condition
      E35-25 (TR3) - K21-1 (+)	Always	Below 1 Ω
      E35-34 (SGND) - K21-2 (-)
      E35-25 (TR3) - Body ground	Always	10 kΩ or higher
      E35-34 (SGND) - Body ground