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Home >> Infiniti >> 2015 >> Q50 Base, RWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> LAN System (Can) (Exc Hybrid) >> DTC/Circuit Diagnosis >> Av Branch Line Circuit >> Diagnosis Procedure

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 display control unit for damage, bend and loose connection (unit side and connector side).

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

    Repair the terminal and connector.

  2. CHECK HARNESS FOR OPEN CIRCUIT

    1. Disconnect the connector of display control unit.
    2. Check the resistance between the display control unit harness connector terminals.
      Display control unit harness connector Resistance (Ω)
      Connector No. Terminal No.
      M100 29 17 Approx. 54 - 66

    Is the measurement value within the specification?

    YES 

    GO TO STEP 3  .

    NO 

    Repair the display control unit.

  3. CHECK POWER SUPPLY AND GROUND CIRCUIT

    Check the power supply and the ground circuit of the display control unit. Refer to DIAGNOSIS PROCEDURE .

    Is the inspection result normal?

    YES (Present error) 

    Replace the display control unit. Refer to REMOVAL AND INSTALLATION .

    YES (Past error) 

    Error was detected in the display control unit branch line.

    NO 

    Repair the power supply and the ground circuit.

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