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

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

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WIRING DIAGRAM

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INSPECTION PROCEDURE

Note:

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

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PROCEDURE


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


    1. A01H19HE04

      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 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
      e73-1 (GND) - Body ground Always Below 1 Ω
      e73-4 (LSW) - Body ground Always Below 1 Ω
      Table 1. Text in Illustration
      *a

      Rear view of wire harness connector

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

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

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    REPAIR OR REPLACE HARNESS OR CONNECTOR