CAN COMMUNICATION SYSTEM, Diagnostic DTC:U0182

DTC Code DTC Name
U0182 Lost Communication with AFS ECU

DESCRIPTION

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

U0182

Lost Communication with AFS ECU

There is no communication from the headlight swivel ECU assembly (AFS ECU).

  • Power source or inside headlight swivel ECU assembly (AFS ECU)

  • Headlight swivel ECU assembly (AFS ECU) branch wire or connector

  • Headlight swivel ECU assembly (AFS ECU)

Power management control ECU

WIRING DIAGRAM

C217350E47

CAUTION / NOTICE / HINT

Note:

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

Tip:

Operating the engine switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

PROCEDURE

  1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

    1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and the branch wire.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

      Note:

      • After turning the engine switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work.

        Click hereClick hereClick here

      • When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

        Click hereClick hereClick hereClick here

      Result

      Result

      NEXT
    NEXT

  2. CHECK OPEN IN CAN BUS WIRE (HEADLIGHT SWIVEL ECU BRANCH WIRE)

    1. C210029C03

      *a

      Rear view of wire harness connector

      (to Headlight Swivel ECU Assembly [AFS ECU])

      Disconnect the A46 headlight swivel ECU assembly (AFS ECU) connector.

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      A46-12 (CANH) - A46-13 (CANL)

      Engine switch off

      54 to 69 Ω

      Resul

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE HEADLIGHT SWIVEL ECU ASSEMBLY CAN BRANCH WIRE OR CONNECTOR (CANH, CANL)

    OK

  3. CHECK HARNESS AND CONNECTOR (HEADLIGHT SWIVEL ECU - BATTERY AND BODY GROUND)

    1. C210029C02

      *a

      Rear view of wire harness connector

      (to Headlight Swivel ECU Assembly [AFS ECU])

      Connect the cable to the negative (-) battery terminal.

      Note:

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

      Click hereClick hereClick hereClick here

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A46-22 (E1) - Body ground

      Always

      Below 1 Ω

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      A46-15 (IG) - Body ground

      Engine switch on (IG)

      11 to 14 V

      Resul

      Result

      OK

      NG
    OK

    REPLACE HEADLIGHT SWIVEL ECU ASSEMBLY (AFS ECU)

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR