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Home >> Infiniti >> 2016 >> Q50 Base, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 51 (Automatic Transmission (Diagnostic Trouble Codes (DTCS) P0750-P2807 And Circuit Diagnosis) (Hybrid)) >> DTC / Circuit Diagnosis >> DTC P1888: Sub E-Oil Pump Relay >> Diagnosis Procedure >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different variant/trim than selected.

  1. CHECK SUB ELECTRIC OIL PUMP RELAY

    1. Turn ignition switch OFF and wait for 10 minutes or more.
    2. Disconnect the negative terminal from 12V battery and wait for 5 minutes or more.
    3. Check sub electric oil pump relay. Refer to COMPONENT INSPECTION (SUB ELECTRIC OIL PUMP RELAY) .

    Is the inspection result normal?

    YES 

    GO TO STEP 2. 

    NO 

    Replace sub electric oil pump relay.

  2. CHECK SUB ELECTRIC OIL PUMP RELAY POWER SUPPLY CIRCUIT

    Check voltage between sub electric oil pump relay harness connector terminal and ground.

    + - Condition Voltage
    (Approx.)
    Sub electric oil pump relay
    Connector Terminal
    T34 1 Ground Turn ignition switch OFF 0 V

    Is the inspection result normal?

    YES 

    GO TO STEP 3. 

    NO 

    Repair or replace damaged parts.

  3. CHECK SUB ELECTRIC OIL PUMP INVERTER BATTERY POWER SUPPLY CIRCUIT

    Check voltage between sub electric oil pump inverter harness connector terminals and ground.

    + - Condition Voltage
    (Approx.)
    Sub electric oil pump inverter
    Connector Terminal
    T2 6 Ground Turn ignition switch OFF 0 V

    Is the inspection result normal?

    YES 

    GO TO STEP 4. 

    NO 

    Repair or replace damaged parts.

  4. CHECK INTERMITTENT INCIDENT

    Refer to INTERMITTENT INCIDENT .

    Is the inspection result normal?

    YES 

    Replace sub electric oil pump inverter. Refer to REMOVAL AND INSTALLATION .

    NO 

    Repair or replace damaged parts.