CAN COMMUNICATION SYSTEM(for LHD), Diagnostic DTC:U1124

DTC Code DTC Name
U1124 Lost Communication with Right Headrest Control ECU

DESCRIPTION

DTC Code DTC Detection Condition Trouble Area
U1124 There is no communication from the active headrest control ECU RH (front seat headrest assembly RH).

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

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

WIRING DIAGRAM

A000XE7E07
*a from P-IG1 Relay
*b Active Headrest Control ECU RH (Front Seat Headrest Assembly RH)

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 RH - BATTERY AND BODY GROUND)


    1. A000XHGE03
      Text in Illustration
      *a

      Rear view of wire harness connector

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

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

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      e60-3 (IG1) - Body ground Power 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
      e60-1 (GND) - Body ground Always Below 1 Ω

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR