CAN COMMUNICATION SYSTEM(for RHD), Diagnostic DTC:U1125

DTC Code DTC Name
U1125 Lost Communication with Left Headrest Control ECU

DESCRIPTION

DTC Code DTC Detection Condition Trouble Area
U1125 There is no communication from the active headrest control ECU LH (front seat headrest assembly LH).

  • Power source or inside of active headrest control ECU LH (front seat headrest assembly LH)

  • Active headrest control ECU LH (front seat headrest assembly LH)

WIRING DIAGRAM

A001DP4E05
*a from P-IG1 Relay
*b Active Headrest Control ECU LH (Front Seat Headrest Assembly LH)

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (ACTIVE HEADREST CONTROL ECU LH - BATTERY AND BODY GROUND)


    1. A001FKUE01
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Active Headrest Control ECU LH [Front Seat Headrest Assembly LH])

      Disconnect the active headrest control ECU LH (front seat headrest assembly LH) connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      e73-3 (IG1) - Body ground Engine switch on (IG) 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      e73-1 (GND) - Body ground Always Below 1 Ω
      e73-4 (LSW) - Body ground Always Below 1 Ω

    OK

    REPLACE ACTIVE HEADREST CONTROL ECU LH (FRONT SEAT HEADREST ASSEMBLY LH) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR