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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 >> BSW/Buzzer 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 drive assistance buzzer control module 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 drive assistance buzzer control module.
    2. Check the resistance between the drive assistance buzzer control module harness connector terminals.
      Drive assistance buzzer control module harness connector Resistance (Ω)
      Connector No. Terminal No.
      M56 3 11 Approx. 54 - 66

    Is the measurement value within the specification?

    YES 

    GO TO STEP 3  .

    NO 

    Repair the drive assistance buzzer control module branch line.

  3. CHECK POWER SUPPLY AND GROUND CIRCUIT

    Check the power supply and the ground circuit of the drive assistance buzzer control module. Refer to DIAGNOSIS PROCEDURE .

    Is the inspection result normal?

    YES (Present error) 

    Replace the drive assistance buzzer control module. Refer to REMOVAL AND INSTALLATION .

    YES (Past error) 

    Error was detected in the drive assistance buzzer control module branch line.

    NO 

    Repair the power supply and the ground circuit.

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