AIR CONDITIONING SYSTEM, Diagnostic DTC:B14A2

DTC Code DTC Name
B14A2 Driver Side Solar Sensor Short Circuit

DESCRIPTION

B002D87E22

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
B14A2 Driver Side Solar Sensor Short Circuit Short in driver side automatic light control sensor

  • 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 this DTC if the malfunction has occurred for the period of time indicated in the brackets.

WIRING DIAGRAM

B002EGUE01

CAUTION / NOTICE / HINT

Note


  • Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.

  • Before disconnecting the cable from the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter.

    Click here

PROCEDURE


  1. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    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 (D Side) Driver side automatic light control sensor

      Min: 0

      Max: 255

      		 Driver side automatic light control sensor value increases as brightness increases -

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

    B

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

    C

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    A

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)


    1. Disconnect the L1 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
      L1-6 (CLTB) - L1-3 (CLTE) Engine switch off Below 1 V
      L1-6 (CLTB) - L1-3 (CLTE) Engine switch on (IG) 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 K65 air conditioning amplifier assembly connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      K65-7 (TSD) - L1-1 (TSL) Always Below 1 Ω
      K65-7 (TSD) - Body ground Always 10 kΩ or higher
      Standard Resistance
      for RHD
      Tester Connection Condition Specified Condition
      K65-7 (TSD) - L1-2 (TSR) Always Below 1 Ω
      K65-7 (TSD) - 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.

      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 K11 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K11-20 (CLTB) - L1-6 (CLTB) Always Below 1 Ω
      K11-22 (CLTE) - L1-3 (CLTE) Always Below 1 Ω
      K11-20 (CLTB) - Body ground Always 10 kΩ or higher
      K11-22 (CLTE) - Body ground Always 10 kΩ or higher
      K11-20 (CLTB) - K11-22 (CLTE) Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR