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HOMESERVICE MANUALSNISSAN-DATSUN2012SENTRA SE-RREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESLAN SYSTEM (CAN)SERVICE INFORMATIONI-KEY BRANCH LINE CIRCUITDIAGNOSIS PROCEDURE
2012 Nissan-Datsun Sentra SE-R

Diagnosis Procedure

2012 Nissan-Datsun Sentra SE-RSECTION Diagnosis Procedure
  1. CHECK CONNECTOR
    1. Turn the ignition switch OFF.
    2. Disconnect the battery cable from the negative terminal.
    3. Check the terminals and connectors of the Intelligent Key unit for damage, bend and loose connection (unit side and connector side).

      Is the inspection result normal? 

      YES: GO TO 2.

      NO: Repair the terminal and connector.

  2. CHECK HARNESS FOR OPEN CIRCUIT
    1. Disconnect the connector of Intelligent Key unit.
    2. Check the resistance between the Intelligent Key unit harness connector terminals.
      Intelligent Key unit harness connector Resistance (Ω)
      Connector No. Terminal No.
      M42 2 3 Approx. 54 - 66

      Is the measurement value within the specification? 

      YES: GO TO 3.

      NO: Repair the Intelligent Key unit branch line.

  3. CHECK POWER SUPPLY AND GROUND CIRCUIT

    Check the power supply and the ground circuit of the Intelligent Key unit. Refer to , "POWER SUPPLY AND GROUND CIRCUIT INSPECTION ".

    Is the inspection result normal? 

    YES (Present error) >> Replace the Intelligent Key unit. Refer to , "REMOVAL AND INSTALLATION OF INTELLIGENT KEY UNIT ".

    YES (Past error) >> Error was detected in the Intelligent Key unit branch line.

    NO: Repair the power supply and the ground circuit.

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.