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HOMESERVICE MANUALSNISSAN-DATSUN2024FRONTIER SL, RWDREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTDRIVERS ASSISTANCE SYSTEMS - ADASADAS CONTROL UNIT (DTC/CIRCUIT DIAGNOSIS)DTC/CIRCUIT DIAGNOSISICC/ADAS (ADAS CONTROL UNIT 2)DTC C1A43-23: OPERATION SW CIRCDTC DIAGNOSIS PROCEDURE
2024 Nissan-Datsun Frontier SL, RWD

DTC Diagnosis Procedure

2024 Nissan-Datsun Frontier SL, RWDSECTION DTC Diagnosis Procedure
  1. CHECK DTC PRIORITY 

    If DTC "C1A43-23" is displayed with DTC "U1000-01", first diagnose the DTC "U1000-01".

    Is applicable DTC detected?

    >>

    Perform diagnosis of applicable. Refer to DTC Description .

    >>

    GO TO 2.

  2. CHECK ICC STEERING SWITCH 
    1. Turn the ignition switch OFF.
    2. Check the ICC steering switch. Refer to Component Inspection .

    Is the inspection result normal?

    >>

    GO TO 3.

    >>

    Replace the ICC steering switch. Refer to Removal and Installation .

  3. CHECK HARNESS BETWEEN COMBINATION SWITCH (SPIRAL CABLE) AND ECM 
    1. Disconnect the combination switch (spiral cable) connector.
    2. Disconnect the ECM connector.
    3. Check for continuity between the combination switch (spiral cable) harness connector and ECM harness connector.
      Combination switch (spiral cable) ECM Continuity
      Connector Terminal Connector Terminal
      M65 14 E16 186 Yes
      15 187
    4. Check for continuity between combination switch (spiral cable) harness connector and ground.
      Combination switch (spiral cable) Ground Continuity
      Connector Terminal
      M65 14 No
      15

    Is the inspection result normal?

    >>

    GO TO 4.

    >>

    Repair the harnesses or connectors.

  4. CHECK COMBINATION SWITCH (SPIRAL CABLE) 
    1. Disconnect combination switch (spiral cable) connector.
    2. Check for continuity between combination switch (spiral cable) connector terminals.
    Combination switch (spiral cable) Continuity
    Connector Terminal Connector Terminal
    M65 14 M68 34 Yes
    15 35

    Is the inspection result normal?

    >>

    GO TO 5.

    >>

    Replace the combination switch (spiral cable). Refer to Removal and Installation .

  5. PERFORM SELF-DIAGNOSIS OF ECM 
    1. Connect the connectors of Combination switch (spiral cable) and ECM.
    2. Turn the ignition switch ON.
    3. Perform "All DTC Reading".
    4. Check if any DTC is detected in "Self Diagnostic Result" of "ENGINE".

    Is any DTC detected?

    >>

    Perform self-diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to DTC Index .

    >>

    Replace the ADAS control unit 2. Refer to Removal and Installation .

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.