Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSNISSAN-DATSUN2024FRONTIER SL, RWDREPAIR AND DIAGNOSISBRAKESTRACTION CONTROLBRAKE CONTROL SYSTEM (VDC/TCS/ABS) (DTC/CIRCUIT DIAGNOSIS)DTC/CIRCUIT DIAGNOSISDTC C1187: DIFFERENTIAL LOCK CONTROL UNITDTC DIAGNOSIS PROCEDURE

2024 Nissan-Datsun Frontier SL, RWD

DTC Diagnosis Procedure

2024 Nissan-Datsun Frontier SL, RWDSECTION DTC Diagnosis Procedure

CHECK DIFFERENTIAL LOCK CONTROL UNIT SYSTEM
1. CONSULT Select "Self Diagnostic Result" mode of "DIFF LOCK". Refer to CONSULT Function (DIFF LOCK) .
Is DTC detected?

YES>>

Check the DTC. Refer to DTC Index .

NO>>

GO TO 2.
CHECK CONNECTOR AND TERMINAL
1. 1. Ignition switch OFF.
  2. Disconnect differential lock control unit harness connector.
  3. Disconnect ABS actuator and electric unit (control unit) harness connector.
  4. Check the connector for disconnection or looseness.
  5. Check the pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair / replace harness, connector, or terminal, securely lock the connector, and GO TO 3.
CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
1. CONSULT
  1. Connect differential lock control unit harness connector.
  2. Connect ABS actuator and electric unit (control unit) harness connector.
  3. Erase "Self Diagnostic Result" mode of "ABS".
  4. Ignition switch OFF.
    NOTE: Wait at least 10 seconds after placing ignition switch in the OFF position.
  5. Start the engine.
    NOTE: Wait at least 10 seconds after starting the engine.
  6. Select "Self Diagnostic Result" mode of "ABS".
Is DTC "C1187" or "U1000" detected?

YES>>

("C1187") GO TO 1.

YES>>

("U1000") Refer to Trouble Diagnosis Flow Chart .

NO>>

Inspection End.

RENDER: 1.0x

NO RELATED

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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.