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Home >> Infiniti >> 2024 >> Q50 Luxe, AWD >> Repair and Diagnosis >> Steering >> Steering Control Systems >> Steering Control System (DTCS) (2 Of 2) >> DAST 2 (Steering Angle Sub Control Module) >> C13BA-00 Control Module Power Supply >> DTC Diagnosis Procedure
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DTC Diagnosis Procedure

  1. CHECK CONTROL MODULE GROUND CIRCUIT 
    1. Turn the ignition switch OFF.
    2. Disconnect steering angle sub control module harness connector.
    3. Check the continuity between control module harness connector and ground.
      Steering angle sub control module - Continuity
      Connector Terminal
      E30 33 Ground Existed
      E31 39

    Is the inspection result normal?

    YES>>

    GO TO 2.

    NO>>

    Repair open circuit or short to ground or short to power in harness or connectors.

  2. CHECK CONTROL MODULE POWER SUPPLY CIRCUIT (1) 
    1. Turn the ignition switch ON.
    2. Check the voltage between control module harness connector and ground.
      + - Voltage
      Steering angle sub control module
      Connector Terminal
      E30 34 Ground 10.5 - 16.0 V

    Is the inspection result normal?

    YES>>

    GO TO 4.

    NO>>

    GO TO 3.

  3. CHECK CONTROL MODULE POWER SUPPLY CIRCUIT (2) 
    1. Turn the ignition switch OFF.
    2. Check the 100A fusible link (#H). (With pre-crash seat belt system)
    3. Check the 100A fusible link (#K). (Without pre-crash seat belt system)
    4. Check the harness for open or short between steering angle sub control module harness connector No. 34 terminal and the 100A fusible link (#H). (With pre-crash seat belt system)
    5. Check the harness for open or short between steering angle sub control module harness connector No. 34 terminal and the 100A fusible link (#K). (Without pre-crash seat belt system)

    Is the inspection result normal?

    YES>>

    Perform the trouble diagnosis for 12V battery power supply circuit.

    NO>>

    Repair / replace harness, connector, or fusible link.

  4. CHECK INTERMITTENT INCIDENT 
    1. Turn the ignition switch OFF.
    2. Check enlarged contact spring of terminal. Refer to Inspection .
    3. Perform intermittent incident while turning steering wheel. Refer to Inspection .

    Is the inspection result normal?

    YES>>

    Replace steering angle sub control module. Refer to STEERING ANGLE SUB CONTROL MODULE : Removal and Installation .

    NO>>

    Repair / replace harness, connector, or terminal.