AIR CONDITIONING SYSTEM, Diagnostic DTC:B1245

DTC Code DTC Name
B1245 Lost Communication with Wiper ECU LIN

DESCRIPTION

The air conditioning amplifier assembly and windshield wiper relay assembly communicate via LIN communication.

The air conditioning amplifier assembly stores this DTC if communication becomes abnormal.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory
B1245 Lost Communication with Wiper ECU LIN Lost communication with windshield wiper relay assembly

  • Harness or connector between windshield wiper relay assembly and IG power source

  • Harness or connector between windshield wiper relay assembly and body ground

  • LIN communication system

  • Windshield wiper relay assembly

Memorized

(10 sec. or more)*

WIRING DIAGRAM

B004PHXE23

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE


  1. CHECK FOR DTC


    1. Check for DTCs.

      Click here


      Body Electrical > Air Conditioner > Trouble Codes
      Result
      Result Proceed to
      DTC B1373 is output A
      DTC B1373 is not output B

    A

    GO TO DTC B1373 Click here

    B

  2. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER RELAY ASSEMBLY - IG POWER SOURCE)


    1. Disconnect the F43 windshield wiper relay assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F43-16 (WIG) - Body ground Power switch on (IG) 11 to 14 V
      F43-16 (WIG) - Body ground Power switch off Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER RELAY ASSEMBLY - BODY GROUND)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F43-12 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - WINDSHIELD WIPER RELAY ASSEMBLY)


    1. Disconnect the F58 air conditioning amplifier assembly connector.

    2. Disconnect the O1 air conditioning thermistor assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F43-14 (MPX1) - F58-15 (SCLI) Always Below 1 Ω
      F43-14 (MPX1) or F58-15 (SCLI) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE WINDSHIELD WIPER RELAY ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR