AIR CONDITIONING SYSTEM(for Automatic Air Conditioning System), Diagnostic DTC:B14A3

DTC Code DTC Name
B14A3 Front Passenger Side Solar Sensor Short Circuit

DESCRIPTION

A01X55PE30

The automatic light control sensor (solar sensor), which is installed on the upper side of the instrument panel, detects sunlight and controls the air conditioning in auto mode. The output current from the solar sensor varies according to the amount of sunlight. When the sunlight increases, the output current increases. As the sunlight decreases, the output current decreases. The air conditioning amplifier assembly detects output current from the solar sensor.

DTC Code DTC Detection Condition Trouble Area
B14A3 An open or short in the passenger side solar sensor circuit.

  • Automatic light control sensor (solar sensor)

  • Harness or connector between solar sensor and air conditioning amplifier assembly

  • Harness or connector between solar sensor and main body ECU (cowl side junction block LH)

  • Main body ECU (cowl side junction block LH)

  • Air conditioning amplifier assembly

Tech Tips

If DTC B1244 is output at the same time, troubleshoot DTC B1244 first.

WIRING DIAGRAM

A01XA36E09
A01XA36E12

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (PASSENGER SIDE SOLAR SENSOR)


    1. Use the Data List to check if the front passenger side solar sensor is functioning properly.

      Air Conditioner
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Solar Sensor (P Side)

      Passenger side solar sensor /

      Min.: 0, Max.: 255

      		 Passenger side solar sensor voltage increases as brightness increases

      Open in the circuit: 0.

      Short in the circuit: 255.
      OK
      The display is as specified in the normal condition.

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    NG

  2. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - AUTOMATIC LIGHT CONTROL SENSOR)

    A01XAFBE02

    1. w/ Rear Heater


      1. Disconnect the F9 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
        E35-8 (TSP) - F9-2 (TSR)*1 Always Below 1 Ω
        E35-8 (TSP) - F9-1 (TSL)*2 Always Below 1 Ω
        E35-8 (TSP) - Body ground Always 10 kΩ or higher

        Tech Tips

        *1: for LHD

        *2: for RHD

    2. w/o Rear Heater

      A01X16PE02

      1. Disconnect the F9 sensor connector.

      2. Disconnect the E81 amplifier connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        E81-32 (TSP) - F9-2 (TSR)*1 Always Below 1 Ω
        E81-32 (TSP) - F9-1 (TSL)*2 Always Below 1 Ω
        E81-32 (TSP) - Body ground Always 10 kΩ or higher

        Tech Tips

        *1: for LHD

        *2: for RHD


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT AUTOMATIC LIGHT CONTROL SENSOR (TSR, TSL - CLTE VOLTAGE)

    A01X548E40

    1. Remove the automatic light control sensor Click here.

    2. Apply battery voltage between terminals 6 (CLTB) and 3 (CLTE) of the solar sensor.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      2 (TSR) - 3 (CLTE)*1 Sensor exposed to electric light 0.8 to 4.3 V
      Sensor covered with a cloth Below 0.8 V
      1 (TSL) - 3 (CLTE)*2 Sensor exposed to electric light 0.8 to 4.3 V
      Sensor covered with a cloth Below 0.8 V

      Tech Tips


      • As the inspection light is moved away from the sensor, the voltage decreases.

      • Use an incandescent light for inspection. Bring it about 300 mm (11.8 in.) from the solar sensor.

      • *1: for LHD

      • *2: for RHD


    NG

    REPLACE AUTOMATIC LIGHT CONTROL SENSOR Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - AUTOMATIC LIGHT CONTROL SENSOR)

    A01XBWHE02
    *1 Front view of wire harness connector: (to Main Body ECU)
    *2 Front view of wire harness connector: (to Automatic Light Control Sensor)

    1. Disconnect the E2 ECU connector.

    2. Disconnect the F9 sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E2-20 (CLTB) - F9-6 (CLTB) Always Below 1 Ω
      E2-19 (CLTS) - F9-5 (CLTS)
      E2-18 (CLTE) - F9-3 (CLTE)
      E2-20 (CLTB) - Body ground Always 10 kΩ or higher
      E2-19 (CLTS) - Body ground
      E2-18 (CLTE) - Body ground

    OK

    REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR