AIR CONDITIONING SYSTEM, Diagnostic DTC:B14A2

DTC Code DTC Name
B14A2 Driver Side Solar Sensor Short Circuit

DESCRIPTION

A003U7WE16

The solar 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 solar sensor varies in accordance with the amount of sunlight. When the amount of sunlight increases, the output voltage increases. As the sunlight decreases, the output voltage decreases. The A/C amplifier detects changes in the output voltage from the solar sensor.

DTC No. DTC Detection Condition Trouble Area
B14A2 Short in driver side solar sensor circuit

  • Solar sensor

  • Harness or connector between solar sensor and A/C amplifier

  • A/C amplifier

WIRING DIAGRAM

A003U5SE27

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the intelligent tester on.

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

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

      Air Conditioner
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note

      Solar Sensor (D side)

      (Solar Sens-D)

      		 Driver side solar sensor / Min.: 0, Max.: 255 Driver side solar sensor value increases as brightness increases -
      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 DTC) C

    B

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    C

    REPLACE A/C AMPLIFIER Click here

    A

  2. CHECK HARNESS AND CONNECTOR (SOLAR SENSOR)


    1. A003RTTE12
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Solar Sensor)
      *2 w/ Automatic Light Control
      *3 w/o Automatic Light Control

      Disconnect the solar sensor connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F1-1 (SS+) - F1-2 (SS-)*1 Power switch off Below 1 V
      F1-1 (SS+) - F1-2 (SS-)*1 Power switch on (IG) 4.5 to 5.5 V
      e1-1 (SS+) - e1-2 (SS-)*2 Power switch off Below 1 V
      e1-1 (SS+) - e1-2 (SS-)*2 Power switch on (IG) 4.5 to 5.5 V

      *1: w/ Automatic Light Control

      *2: w/o Automatic Light Control


    NG

    CHECK HARNESS AND CONNECTOR (SOLAR SENSOR - A/C AMPLIFIER) Click here

    OK

    REPLACE COOLER (SOLAR SENSOR) THERMISTOR Click here

  3. CHECK HARNESS AND CONNECTOR (SOLAR SENSOR - A/C AMPLIFIER)


    1. Disconnect the solar sensor connector.

    2. Disconnect the A/C amplifier connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E30-33 (TS) - F1-2 (SS-)*1 Always Below 1 Ω
      E30-31 (S5-4) - F1-1 (SS+)*1 Always Below 1 Ω
      E30-33 (TS) - e1-2 (SS-)*2 Always Below 1 Ω
      E30-31 (S5-4) - e1-1 (SS+)*2 Always Below 1 Ω
      E30-33 (TS) - Body ground Always 10 kΩ or higher
      E30-31 (S5-4) - Body ground Always 10 kΩ or higher

      *1: w/ Automatic Light Control

      *2: w/o Automatic Light Control


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE A/C AMPLIFIER Click here