LEMON Manuals: Even more car manuals for everyone
Home >> Infiniti >> 2017 >> QX30 Base >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> LAN System (Can) >> DTC/Circuit Diagnosis >> Can PDEC (Chassis) - Sonar Control Unit Circuit >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK HARNESS CONNECTOR CONNECTION

    Check the following harness connector for disconnection or looseness.

    • CAN potential distributor electrical connector (chassis)
    • Sonar control unit

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

    Securely connect the harness connectors.

  2. CHECK POWER SUPPLY AND GROUND CIRCUIT

    Check power supply and ground circuit for sonar control unit. Refer to WIRING DIAGRAM (Front 6 & rear 4 sensors) or WIRING DIAGRAM (Front 6 & rear 6 sensors with park assist).

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    Repair or replace the malfunctioning part.

  3. CHECK CIRCUIT (SHORT TO BATTERY)

    1. Turn ignition switch OFF.
    2. Disconnect the following unit connectors.
      • CAN potential distributor electrical connector (chassis)
      • Sonar control unit
    3. Check voltage between CAN potential distributor electrical connector (chassis) harness connector and ground.
      Terminals Voltage
      (Approx.)
      + -
      CAN potential distributor electrical connector (chassis) Ground
      Connector Terminal
      M295 12 - 0 V
      13

    Is the inspection result normal?

    YES 

    GO TO STEP 4  .

    NO 

    Repair or replace harness.

  4. CHECK CIRCUIT (SHORT TO GROUND)

    Check continuity between CAN potential distributor electrical connector (chassis) harness connector and ground.

    CAN potential distributor electrical connector (chassis) Ground Continuity
    Connector Terminal
    M295 12 - Not existed
    13

    Is the inspection result normal?

    YES 

    GO TO STEP 5  .

    NO 

    Repair or replace harness.

  5. CHECK CIRCUIT (SHORT WITH CAN-H AND CAN-L)

    Check continuity between CAN potential distributor electrical connector (chassis) harness connector terminals.

    CAN potential distributor electrical connector (chassis) Continuity
    Connector Terminal Connector Terminal
    M295 12 M295 13 Not existed

    Is the inspection result normal?

    YES 

    GO TO STEP 6  .

    NO 

    Repair or replace harness.

  6. CHECK CIRCUIT (OPEN)

    Check continuity between the following unit harness connectors.

    • CAN potential distributor electrical connector (chassis)
    • Sonar control unit
      CAN POTENTIAL DISTRIBUTOR ELECTRICAL CONNECTOR (CHASSIS) - SONAR CONTROL UNIT

      CAN potential distributor electrical connector (chassis) Sonar control unit Continuity
      Connector Terminal Connector Terminal
      M295 12 M4 25 Existed
      13 24

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    Repair or replace harness.

scientia non olet · About LEMON Manuals