AIR CONDITIONING SYSTEM, Diagnostic DTC:B14A4

DTC Code DTC Name
B14A4 Solar Sensor Short Circuit(Rear Driver Side)

DESCRIPTION

A01H1ZOE01

The rear solar sensor is installed on the package tray trim panel. It detects sunlight to control air conditioning AUTO mode. The output voltage from the rear 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 luggage room junction block (rear junction block ECU) sends the read signal to the air conditioning amplifier via the CAN communication line.

DTC Code DTC Detection Condition Trouble Area
B14A4 Short in rear solar sensor circuit

  • Rear solar sensor

  • Harness or connector

  • Luggage room junction block (rear junction block ECU)

  • Air conditioning amplifier

  • CAN communication system

WIRING DIAGRAM

A01H04SE04

INSPECTION PROCEDURE

Tech Tips

This circuit uses the CAN communication line. Before performing the inspection, check that the CAN communication system is functioning normally.

PROCEDURE


  1. READ VALUE USING GTS (REAR SOLAR SENSOR)


    1. Use the Data List to check if the driver side solar sensor is functioning properly.

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

      Rear solar sensor /

      Min.: 0, Max.: 255

      		 Rear solar sensor value increases as brightness increases -
      OK
      The display is as specified in the normal condition.

    NG

    INSPECT REAR SOLAR SENSOR Click here

    OK

    REPLACE AIR CONDITIONER AMPLIFIER Click here

  2. INSPECT REAR SOLAR SENSOR


    1. Remove the rear solar sensor Click here.

    2. Inspect the rear solar sensor Click here.


    NG

    REPLACE REAR SOLAR SENSOR Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (REAR SOLAR SENSOR - REAR JUNCTION BLOCK ECU)


    1. A01H0CUE02

      Disconnect the z21 rear solar sensor connector.

    2. Disconnect the S62 luggage room junction block (rear junction block ECU) connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      z21-1 - S62-26 (TSB) Always Below 1 Ω
      z21-2 - S62-18 (TSD) Always Below 1 Ω
      S62-26 (TSB) - Body ground Always 10 kΩ or higher
      S62-18 (TSD) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE LUGGAGE ROOM JUNCTION BLOCK (REAR JUNCTION BLOCK ECU)