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Home >> Infiniti >> 2014 >> QX60 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 88 (Audio, Visual & Navigation System (DTC/Circuit Diagnosis) (BOSE Audio W/NAVI W/O Surround) (Except Hybrid) (2 Of 2)) >> DTC/Circuit Diagnosis >> DTC B272C: Corner Sensor [Fr] >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

Regarding Wiring Diagram information, refer to WIRING DIAGRAM .

  1. CHECK FRONT SONAR SENSOR RH OUTER CIRCUIT CONTINUITY

    1. Turn ignition switch OFF.
    2. Disconnect sonar control unit connector and front sonar sensor RH outer connector.
    3. Check continuity between sonar control unit connector M70 and front sonar sensor RH outer connector E308.
      Sonar control unit Front sonar sensor RH outer Continuity
      Connector Terminal Connector Terminal
      M70 4 E308 2 Yes
      13 1
    4. Check continuity between sonar control unit connector M70 and ground.
      Sonar control unit Ground Continuity
      Connector Terminal
      M70 4 - No

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

    Repair or replace harness or connectors.

  2. CHECK FRONT SONAR SENSOR RH OUTER SIGNAL CIRCUIT SHORT TO BATTERY

    1. Turn ignition switch ON.
    2. Check voltage between sonar control unit connector M70 and ground.
      Sonar control unit Ground Voltage
      (Approx.)
      Connector Terminal
      M70 4 - 0V

    Is the inspection result normal?

    YES 

    Replace front sonar sensor RH outer. Refer to REMOVAL AND INSTALLATION .

    NO 

    Repair or replace harness or connectors.

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