AIR CONDITIONING SYSTEM, Diagnostic DTC:B14A3

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

DESCRIPTION

E107008E21

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)

-
Tip:

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

WIRING DIAGRAM

Figure 1. for LHD:
E269950E04
Figure 2. for RHD:
E269950E06

CAUTION / NOTICE / HINT

Note:

  • When the servo motor or 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 (SOLAR SENSOR [P SIDE])

    1. Connect the GTS to the DLC3.

    2. Turn the power 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 (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. E269949C01

      *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)

      Power switch off

      Below 1 V

      G2-6 (CLTB) - G2-3 (CLTE)

      Power 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 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.

      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 (NULTIPLEX NETWORK BODY ECU) (MULTIPLEX NETWORK BODY ECU)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR