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Home >> Infiniti >> 2017 >> QX70 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 240 (Hybrid Motor System (Diagnostic Trouble Codes (DTCS) P0A02-U1002) (Hybrid)) >> DTC Diagnosis >> DTC P0A1B: Drive Motor A Control Module >> Diagnosis Procedure >> Diagnostic Test

Diagnostic Test

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 TRACTION MOTOR INVERTER HARNESS CONNECTOR

    1. Turn ignition switch OFF.
    2. Check the connection conditions of the traction motor inverter harness connector.

    Is the inspection result normal?

    YES 

    GO TO STEP 2. 

    NO 

    Repair or replace damaged parts.

  2. CHECK POWER CIRCUIT

    1. Disconnect the traction motor inverter harness connector.
    2. Turn ignition switch ON.
    3. Check the voltage between traction motor inverter vehicle side harness connector terminals.
      CAUTION:

      Never damage connector terminals.

      Traction motor inverter Voltage
      Connector Terminal
      + -
      E2 42 41 10 - 16 V
      44 43

    Is the inspection result normal?

    YES 

    Replace the traction motor inverter. Refer to REMOVAL AND INSTALLATION .

    NO 

    GO TO STEP 3. 

  3. DETECTION OF MALFUNCTION ITEMS

    Check the following items:

    • Harness open circuit or short circuit between traction motor inverter vehicle side harness connector terminals and fuse and fusible link block No. 1
    • Harness open circuit or short circuit between fuse and fusible link block No. 1 and 12V battery
    • 10A fuse (#89, Fuse and fusible link block No. 1)
    • 50A fusible link (#X, Fuse and fusible link block No. 1)
    • Self shut off relay
    • 12V battery

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    Repair or replace damaged parts.