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

DTC Code DTC Name
B14A2 Driver Side Solar Sensor Short Circuit

DESCRIPTION

E107008E22

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

B14A2

Driver Side Solar Sensor Short Circuit

Short in driver side cooler (solar sensor) thermistor (for dual type) or cooler (solar sensor) thermistor (for single type) circuit

  • Cooler (solar sensor) thermistor

  • Harness or connector between cooler (solar sensor) thermistor and air conditioning amplifier assembly

  • Air conditioning amplifier assembly

Memorized

(4 sec. or more)*1

  • *1: The air conditioning amplifier assembly stores this DTC if the malfunction has occurred for the period of time indicated in the brackets.

WIRING DIAGRAM

E266250E01
E266250E03

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 (D Side)

      Driver side cooler (solar sensor) thermistor*1 or cooler (solar sensor) thermistor*2

      Min: 0

      Max: 255

      Driver side cooler (solar sensor) thermistor*1 or cooler (solar sensor) thermistor*2 value increase as brightness increases

      -

      • *1: for Dual Type

      • *2: for Single Type

      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 hereClick hereClick hereClick hereClick hereClick here

    C

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

    Click hereClick hereClick hereClick here

    A

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

    1. Disconnect the F1*C or F4*D cooler (solar sensor) thermistor connector.

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

      Standard Voltage

      Table 1. for Dual type

      Tester Connection

      Condition

      Specified Condition

      F1-1 (S5) - F1-3 (TSD)*A

      Ignition switch off

      Below 1 V

      F1-1 (S5) - F1-3 (TSD)*A

      Ignition switch ON

      4.75 to 5.25 V

      F1-1 (S5) - F1-2 (TSD)*B

      Ignition switch off

      Below 1 V

      F1-1 (S5) - F1-2 (TSD)*B

      Ignition switch ON

      4.75 to 5.25 V

      Standard Voltage

      Table 2. for Single type

      Tester Connection

      Condition

      Specified Condition

      F4-1 (SS+) - F4-2 (SS-)

      Ignition switch off

      Below 1 V

      F4-1 (SS+) - F4-2 (SS-)

      Ignition switch ON

      4.75 to 5.25 V

      • *A: for LHD

      • *B: for RHD

      • *C: for Dual Type

      • *D: for Single Type

    Result

    Proceed to

    OK

    NG
    NG

    CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - COOLER (SOLAR SENSOR) THERMISTOR)Click here

    OK

  3. INSPECT COOLER (SOLAR SENSOR) THERMISTOR

    1. Remove the cooler (solar sensor) thermistor.

    2. Reconnect the F1*C or F4*D cooler (solar sensor) thermistor connector.

    3. Turn the ignition switch to ON.

    4. E266987C05

      *A

      for Single Type

      *B

      for Dual Type

      *C

      for LHD

      *D

      for RHD

      *a

      Component with harness connected

      (Cooler (Solar Sensor) Thermistor)

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

      Standard Voltage

      Table 3. for Dual type

      Tester Connection

      Condition

      Specified Condition

      F1-1 (S5) - F1-3 (TSD)*A

      Sensor is subjected to electric light

      0.8 to 4.3 V

      F1-1 (S5) - F1-3 (TSD)*A

      Sensor is covered with a cloth

      Below 0.8 V

      F1-1 (S5) - F1-2 (TSD)*B

      Sensor is subjected to electric light

      0.8 to 4.3 V

      F1-1 (S5) - F1-2 (TSD)*B

      Sensor is covered with a cloth

      Below 0.8 V

      Standard Voltage

      Table 4. for Single type

      Tester Connection

      Condition

      Specified Condition

      F4-1 (SS+) - F4-2 (SS-)

      Sensor is subjected to electric light

      0.8 to 4.3 V

      F4-1 (SS+) - F4-2 (SS-)

      Sensor is covered with a cloth

      Below 0.8 V
      Note:

      • The connection procedure for using a digital tester such as a TOYOTA electrical tester is shown above. When using an analog tester, connect the negative (-) lead to terminal 1 and the positive (+) lead to terminal 3*A, *C, 2*B, *C or 2*D of the cooler (solar sensor) thermistor.

      • Do not bring the positive and negative tester probes too close to each other as a short circuit may occur.

      Tip:

      • Use an incandescent light for inspection. Bring it within about 30 cm (11.8 in.) of the cooler (solar sensor) thermistor.

      • As the inspection light is moved away from the sensor, the voltage decreases.

      • *A: for LHD

      • *B: for RHD

      • *C: for Dual Type

      • *D: for Single Type

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

    Click hereClick hereClick hereClick here

    NG

    REPLACE COOLER (SOLAR SENSOR) THERMISTOR

    Click hereClick here

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

    1. Disconnect the E28 air conditioning amplifier assembly connector.

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

      Standard Resistance

      Table 5. for Dual type

      Tester Connection

      Condition

      Specified Condition

      E28-30 (S5-1) - F1-1 (S5)

      Always

      Below 1 Ω

      E28-33 (TSD) - F1-3 (TSD)*A

      Always

      Below 1 Ω

      E28-33 (TSD) - F1-2 (TSD)*B

      Always

      Below 1 Ω

      E28-30 (S5-1) - Body ground

      Always

      10 kΩ or higher

      E28-33 (TSD) - Body ground

      Always

      10 kΩ or higher

      • *A: for LHD

      • *B: for RHD

      Standard Resistance

      Table 6. for Single type

      Tester Connection

      Condition

      Specified Condition

      E28-30 (S5-1) - F4-1 (SS+)

      Always

      Below 1 Ω

      E28-33 (TSD) - F4-2 (SS-)

      Always

      Below 1 Ω

      E28-30 (S5-1) - Body ground

      Always

      10 kΩ or higher

      E28-33 (TSD) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    for LHD:Click hereClick here

    for RHD:Click hereClick here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR