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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 >> Abs Branch Line Circuit >> Diagnosis Procedure >> Diagnostic Test

Diagnostic Test

  1. CHECK CONNECTOR

    1. Turn the ignition switch OFF.
    2. Disconnect the battery cable from the negative terminal.
    3. Check the following terminals and connectors for damage, bend and loose connection (unit side and connector side).
      • ABS actuator and electric unit (control unit)
      • Harness connector E65 and fuse block (J/B) side connector

    Is the inspection result normal?

    YES - 1 

    Models with around view monitor system: GO TO STEP 2  .

    YES - 2 

    Models without around view monitor system: GO TO STEP 3  .

    NO 

    Repair the terminal and connector.

  2. CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

    1. Disconnect the connector of CAN gateway.
    2. Check the continuity between the CAN gateway harness connector terminals.
      CAN gateway harness connector Continuity
      Connector No. Terminal No.
      M24 4 6 Existed
      10 12 Existed

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    Check the harness and repair the root cause (CAN communication circuit 2).

  3. CHECK HARNESS FOR OPEN CIRCUIT

    1. Connect the connector of CAN gateway (Models with around view monitor system).
    2. Disconnect the connector of ABS actuator and electric unit (control unit).
    3. Check the resistance between the ABS actuator and electric unit (control unit) harness connector terminals.
      ABS actuator and electric unit (control unit) harness connector Resistance (Ω)
      Connector No. Terminal No.
      E35 25 15 Approx. 54 - 66

    Is the measurement value within the specification?

    YES 

    GO TO STEP 4  .

    NO 

    GO TO STEP 5  .

  4. CHECK POWER SUPPLY AND GROUND CIRCUIT

    Check the power supply and the ground circuit of the ABS actuator and electric unit (control unit). Refer to DIAGNOSIS PROCEDURE .

    Is the inspection result normal?

    YES (Present error) 

    Replace the ABS actuator and electric unit (control unit). Refer to REMOVAL AND INSTALLATION .

    YES (Past error) 

    Error was detected in the ABS actuator and electric unit (control unit) branch line.

    NO 

    Repair the power supply and the ground circuit.

  5. CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

    1. Disconnect the connector of harness connector E65.
    2. Check the resistance between the ABS actuator and electric unit (control unit) harness connector terminals.
      • With around view monitor system
        ABS actuator and electric unit (control unit)
        harness connector        		 Harness connector Continuity
        Connector No. Terminal No. Connector No. Terminal No.
        E35 25 E65 6F Existed
        15 7F Existed
      • Without around view monitor system
        ABS actuator and electric unit (control unit)
        harness connector        		 Harness connector Continuity
        Connector No. Terminal No. Connector No. Terminal No.
        E35 25 E65 8F Existed
        15 3F Existed

    Is the inspection result normal?

    YES 

    Replace the fuse block (J/B)

    NO 

    Repair the harness between the ABS actuator and electric unit (control unit) harness connector E35 and the harness connector E65

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