AIR CONDITIONING SYSTEM, Diagnostic DTC:B1429/29

DTC Code DTC Name
B1429/29 Rear Air Foot Duct Sensor Circuit on Front Passenger Side

DESCRIPTION

The duct sensor RH*1 or LH*2 (for front passenger side) detects the duct temperature and sends the appropriate signals to the air conditioning amplifier assembly.

DTC Code DTC Detection Condition Trouble Area
B1429/29 An open or short in the duct sensor RH*1 or LH*2 circuit.

  • Duct sensor RH*1

  • Duct sensor LH*2

  • Harness or connector (duct sensor RH)*1

  • Harness or connector (duct sensor LH)*2

  • Air conditioning amplifier assembly

WIRING DIAGRAM

A01EPOUE51
A01EPOUE52

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (DUCT SENSOR)


    1. Use the Data List to check if the duct 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)

      Duct sensor /

      Min.: -12.7°C (9.14°F)

      Max.: 76.55°C (169.79°F)

      		 Actual temperature measured by duct sensor (for front passenger side) displayed

      Open in the circuit: -12.7°C (9.14°F).

      Short in the circuit: 76.55°C (169.79°F).

      • *1: for LHD

      • *2: for RHD

      OK
      The display is as specified in the normal condition.

    NG

    CHECK DUCT SENSOR Click here

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

  2. CHECK DUCT SENSOR

    A01EPVTE03

    1. for LHD:


      1. Remove the duct sensor RH Click here.

    2. for RHD:


      1. Remove the duct 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 (-) 10°C (50°F) 9.4 to 10.5 kΩ
      15°C (59°F) 7.5 to 8.3 kΩ
      20°C (68°F) 6.0 to 6.5 kΩ
      25°C (77°F) 4.8 to 5.2 kΩ
      30°C (86°F) 3.8 to 4.2 kΩ
      35°C (95°F) 3.1 to 3.4 kΩ
      40°C (104°F) 2.5 to 2.8 kΩ
      45°C (113°F) 2.0 to 2.3 kΩ
      50°C (122°F) 1.6 to 2.0 kΩ
      55°C (131°F) 1.3 to 1.6 kΩ
      60°C (140°F) 1.1 to 1.4 kΩ

      Note


      • Touching the sensor even slightly may change the resistance value. Hold the connector of the sensor.

      • When measuring the resistance, the sensor temperature must be the same as the ambient temperature.

      Tech Tips

      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

    B

    REPLACE DUCT SENSOR RH Click here

    C

    REPLACE DUCT SENSOR LH Click here

    A

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

    A01EOV0E12

    1. for LHD:


      1. Disconnect the L11 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) - L11-1 (+) Always Below 1 Ω
        E35-12 (SG-9) - L11-2 (-)
        E35-26 (TR4) - Body ground Always 10 kΩ or higher
        E35-12 (SG-9) - Body ground
    2. A01EOV0E13

      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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here