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Home >> Infiniti >> 2017 >> QX70 RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 183 (LAN System (Can) (Wiring Diagrams And Circuit Diagnosis) (Hybrid)) >> Circuit Diagnosis >> EV/HEV Branch Line Circuit (HEV System Can Circuit) >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2016 Infiniti Q50. However, it is still accessible from the selected car via links, so may be relevant.

  1. CHECK CONNECTOR

    1. Turn the ignition switch OFF.
    2. Disconnect the 12V battery cable from the negative terminal.
    3. Check the terminals and connectors of the HPCM 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 HPCM.
    2. Check the resistance between the HPCM harness connector terminals.
      HPCM harness connector Resistance (Ω)
      Connector No. Terminal No.
      B15 42 54 Approx. 54 - 66

    Is the measurement value within the specification?

    YES 

    GO TO STEP 3  .

    NO 

    Replace the body harness.

  3. CHECK POWER SUPPLY AND GROUND CIRCUIT

    Check the power supply and the ground circuit of the HPCM. Refer to DIAGNOSIS PROCEDURE .

    Is the inspection result normal?

    YES (Present error) 

    Replace the HPCM. Refer to REMOVAL AND INSTALLATION .

    YES (Past error) 

    Error was detected in the HPCM branch line (HEV system CAN circuit side).

    NO 

    Repair the power supply and the ground circuit.

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