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

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

DESCRIPTION

A01V8GHE21

The automatic light control sensor is installed on the upper side of the instrument panel. It detects sunlight to control air conditioning AUTO mode. The output voltage from the automatic light control sensor varies in accordance with the amount of sunlight. When the sunlight increases, the output voltage increases. As the sunlight decreases, the output voltage decreases. The air conditioning amplifier assembly detects changes in the output voltage from the automatic light control sensor.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory Note
B14A3 Front Passenger Side Solar Sensor Short Circuit Short in front passenger side automatic light control sensor circuit

  • Automatic light control sensor

  • Harness or connector

  • Main body ECU (multiplex network body ECU)

  • Air conditioning amplifier assembly

 Memorized (4 seconds or more) -

Tech Tips

The air conditioning amplifier assembly stores the DTC of the respective malfunction if it has occurred for the period of time indicated in the brackets.

WIRING DIAGRAM

A01V7YXE02

CAUTION / NOTICE / HINT

Note


  • When the battery is disconnected or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization.

    Click here

  • When replacing the main body ECU (multiplex network body ECU), make sure to replace it with a new one.

PROCEDURE


  1. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Air Conditioner / Data List.

    5. Check the value(s) by referring to the table below.


      Body Electrical > Air Conditioner > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Solar Sensor (P Side) Front passenger side automatic light control sensor

      Min.: 0

      Max.: 255

      		 Front passenger side automatic light control sensor value increases as brightness increases -

      Body Electrical > Air Conditioner > Data List
      Tester Display
      Solar Sensor (P Side)
      OK
      The display is as specified in the Normal Condition column.
      Result
      Result Proceed to
      OK (When troubleshooting according to Problem Symptoms Table) A
      OK (When troubleshooting according to the DTC) B
      NG C

    A

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    B

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    C

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)


    1. A01V7UYC01
      *a

      Front view of wire harness connector

      (to Automatic Light Control Sensor)

      Disconnect the automatic light control sensor connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G2-6 (CLTB) - G2-3 (CLTE) Ignition switch off Below 1 V
      G2-6 (CLTB) - G2-3 (CLTE) Ignition switch ON 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - AUTOMATIC LIGHT CONTROL SENSOR) Click here

    OK

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


    1. Disconnect the G81 air conditioning amplifier assembly connector.

    2. Disconnect the G2 automatic light control sensor connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      G81-32 (TSP) - G2-2 (TSR) Always Below 1 Ω
      G81-32 (TSP) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      G81-32 (TSP) - G2-1 (TSL) Always Below 1 Ω
      G81-32 (TSP) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT AUTOMATIC LIGHT CONTROL SENSOR


    1. Remove the automatic light control sensor with the connectors still connected.

      Click here

    2. Inspect the automatic light control sensor.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    NG

    REPLACE AUTOMATIC LIGHT CONTROL SENSOR Click here

  5. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - AUTOMATIC LIGHT CONTROL SENSOR)


    1. Disconnect the G78 main body ECU (multiplex network body ECU) connector.

    2. Disconnect G2 automatic light control sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G78-20 (CLTB) - G2-6 (CLTB) Always Below 1 Ω
      G78-22 (CLTE) - G2-3 (CLTE) Always Below 1 Ω
      G78-20 (CLTB) - Body ground Always 10 kΩ or higher
      G78-22 (CLTE) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) for LHD: Click here for RHD: Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR