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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 P1815: M-Mode Switch >> Diagnosis Procedure >> Diagnostic Test

Diagnostic Test

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

  1. CHECK INPUT SIGNAL

    G-20With CONSULT 

    1. Turn ignition switch ON.
    2. Select "MANU MODE SW", "NON M MODE SW", "UP SW LEVER" and "DOWN SW LEVER" in "Data Monitor" in "TRANSMISSION".
    3. Check the ON/OFF operations of each monitor item.
      Item Monitor Item Condition Status
      Manual mode switch MANU MODE SW Selector lever is shifted to manual shift gate side ON
      Other than the above OFF
      NON M-MODE SW Selector lever is shifted to manual shift gate side OFF
      Other than the above ON
      UP SW LEVER Selector lever is shifted to + side ON
      Other than the above OFF
      DOWN SW LEVER Selector lever is shifted to - side ON
      Other than the above OFF

    G-21Without CONSULT 

    Drive the vehicle in manual mode, and then check that indication of shift position indicator matches with the actual gear position.

    1. Shift the selector lever to UP side, and then accelerate from 1GR to 7GR.
    2. Shift the selector lever to DOWN side, and then decelerate from 7GR to 1GR.

    GO TO STEP 2  .

  2. CHECK MANUAL MODE SWITCH CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect A/T shift selector connector.
    3. Turn ignition switch ON.
    4. Check voltage between A/T shift selector harness connector terminals.
      A/T shift selector Voltage
      (Approx.)
      Connector + -
      Terminal
      M7 1 4 12 V
      2
      3
      5

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    GO TO STEP 4  .

  3. CHECK MANUAL MODE SWITCH

    1. Turn ignition switch OFF.
    2. Check manual mode switch. Refer to COMPONENT INSPECTION (MANUAL MODE SWITCH) .

    Is the inspection result normal?

    YES 

    GO TO STEP 7  .

    NO 

    Repair or replace damaged parts.

  4. CHECK GROUND CIRCUIT (MANUAL MODE SWITCH CIRCUIT)

    1. Turn ignition switch OFF.
    2. Check continuity between A/T shift selector harness connector terminal and ground.
      A/T shift selector - Continuity
      Connector Terminal
      M7 4 Ground Existed

    Is the inspection result normal?

    YES 

    GO TO STEP 5  .

    NO 

    Repair or replace damaged parts.

  5. CHECK HARNESS BETWEEN A/T SHIFT SELECTOR AND COMBINATION METER (PART 1)

    1. Disconnect combination meter connector.
    2. Check continuity between A/T shift selector harness connector terminals and combination meter harness connector terminals.
      A/T shift selector Combination meter Continuity
      Connector Terminal Connector Terminal
      M7 1 M57 30 Existed
      2 33
      3 32
      5 31

    Is the inspection result normal?

    YES 

    GO TO STEP 6  .

    NO 

    Repair or replace damaged parts.

  6. CHECK HARNESS BETWEEN A/T SHIFT SELECTOR AND COMBINATION METER (PART 2)

    Check continuity between A/T shift selector harness connector terminals and ground.

    A/T shift selector - Continuity
    Connector Terminal
    M7 1 Ground Not existed
    2
    3
    5

    Is the inspection result normal?

    YES 

    GO TO STEP 7  .

    NO 

    Repair or replace damaged parts.

  7. CHECK INTERMITTENT INCIDENT

    Refer to INTERMITTENT INCIDENT .

    Is the inspection result normal?

    YES 

    GO TO STEP 8  .

    NO 

    Repair or replace damaged parts.

  8. CHECK COMBINATION METER

    1. Reconnect all the connectors.
    2. Turn ignition switch ON.
    3. Select "M RANGE SW," "NM RANGE SW," "AT SFT UP SW," and "AT SFT DWN SW," in "Data Monitor" in "METER/M&A."
    4. Check the ON/OFF operations of each monitor item. Refer to REFERENCE VALUE .

    Is the inspection result normal?

    YES 

    Replace transmission assembly. Refer to REMOVAL AND INSTALLATION .

    NO 

    Replace combination meter. Refer to REMOVAL AND INSTALLATION .