AIR CONDITIONING SYSTEM, Diagnostic DTC:B14A2

DTC Code DTC Name
B14A2 Driver Side Solar Sensor Short Circuit

DESCRIPTION

A01ERONE01

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
B14A2 An open or short in the driver side solar sensor circuit.

  • Automatic light control sensor (solar sensor)

  • Harness or connector

  • 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

A01ENXOE17

INSPECTION PROCEDURE

PROCEDURE


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


    1. Use the Data List to check if the driver side solar sensor is functioning properly Click here.

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

      Driver side solar sensor /

      Min.: 0, Max.: 255

      		 Driver 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.

    NG

    CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - AUTOMATIC LIGHT CONTROL SENSOR) Click here

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

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

    A01EONAE04

    1. for LHD:


      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
        E35-7 (TSD) - F9-1 (TSL) Always Below 1 Ω
        E35-7 (TSD) - Body ground Always 10 kΩ or higher

    2. for RHD:


      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
        E35-7 (TSD) - F9-2 (TSR) Always Below 1 Ω
        E35-7 (TSD) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    A01EPCJE31

    1. Remove the automatic light control sensor Click here.

    2. Apply battery voltage to 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
      1 (TSL) - 3 (CLTE)*1 Sensor exposed to electric light 0.8 to 4.3 V
      Sensor covered with a cloth Below 0.8 V
      2 (TSR) - 3 (CLTE)*2 Sensor exposed to electric light 0.8 to 4.3 V
      Sensor covered with a cloth Below 0.8 V

      • *1: for LHD

      • *2: for RHD

      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.


    NG

    REPLACE AUTOMATIC LIGHT CONTROL SENSOR Click here

    OK

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

    A01EQ9LE01

    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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)