AIR CONDITIONING SYSTEM(for Automatic Air Conditioning System), Diagnostic DTC:B14A2

DTC Code DTC Name
B14A2 Driver Side Solar Sensor Short Circuit

DESCRIPTION

The cooler thermistor (solar sensor) is installed on the upper side of the instrument panel. It detects sunlight to control the air conditioning in AUTO mode. The output voltage from the cooler thermistor (solar 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 cooler thermistor (solar sensor).

DTC No. Detection Item DTC Detection Condition Trouble Area Memory Note
B14A2 Driver Side Solar Sensor Short Circuit Short in cooler thermistor (solar sensor) circuit

  • Cooler thermistor (solar sensor)

  • Harness or connector

  • 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 parentheses.

WIRING DIAGRAM

B003M00E19
*a Cooler Thermistor (Solar Sensor)
*b Air Conditioning Amplifier Assembly

CAUTION / NOTICE / HINT

Note

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

Click here

PROCEDURE


  1. READ VALUE USING GTS (SOLAR SENSOR [D SIDE])


    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. Read the Data List according to the display on the GTS.


      Body Electrical > Air Conditioner > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Solar Sensor (D Side) Cooler thermistor (solar sensor) 0 to 255 Cooler thermistor (solar sensor) value increases as brightness increases

      Cooler thermistor (solar sensor) malfunction:


      • When open circuit: 0

      • When short circuit: 255

      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
      OK (When troubleshooting according to the DTC) A
      OK (When troubleshooting according to Problem Symptoms Table) B
      NG C

    A

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    B

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

    C

  2. INSPECT COOLER THERMISTOR (SOLAR SENSOR)


    1. Inspect the cooler thermistor (solar sensor).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE COOLER THERMISTOR (COOLER THERMISTOR) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - COOLER THERMISTOR [SOLAR SENSOR])


    1. Disconnect the G37 air conditioning amplifier assembly connector.

    2. Disconnect the H4 cooler thermistor (solar sensor) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G37-30 (S5-3) - H4-1 (SS+) Always Below 1 Ω
      G37-33 (TSD) - H4-2 (SS-) Always Below 1 Ω
      G37-30 (S5-3) or H4-1 (SS+) - Body ground Always 10 kΩ or higher
      G37-33 (TSD) or H4-2 (SS-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR