STOP AND START SYSTEM Neutral Position Switch Circuit

DESCRIPTION

The engine stop and start ECU uses the park/neutral position switch assembly installed to the automatic transmission assembly to detect when the shift lever is in P or N.

WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note


  • Before replacing the engine stop and start ECU, read the number of starter operations and total number of engine starts and write it into a new engine stop and start ECU.

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  • After replacing the engine stop and start ECU or air conditioning amplifier assembly, reset and perform learning of the air conditioning information in the engine stop and start ECU.

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  • After replacing the engine stop and start ECU or yaw rate sensor, clear and calibrate the deceleration sensor zero point in the engine stop and start ECU.

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  • When the engine stop and start ECU is replaced, check the oil pump assembly with solenoid.

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  • Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE


  1. READ VALUE USING GTS (NEUTRAL SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Stop and Start / Data List / Neutral Switch.

    5. In accordance with the display on the GTS, read the Data List.


      Powertrain > Stop and Start > Data List
      Tester Display
      Neutral Switch
      OK
      Tester Display Condition Normal Condition
      Neutral Switch Shift lever in P or N ON
      Shift lever not in P or N OFF
      Result
      Proceed to
      OK
      NG

    OK

    GO TO PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

  2. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY


    1. Inspect the park/neutral position switch assembly.

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      Result
      Proceed to
      OK
      NG

    NG

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - PARK/NEUTRAL POSITION SWITCH ASSEMBLY)


    1. Disconnect the A94 engine stop and start ECU connector.

    2. Disconnect the F54 park/neutral position switch assembly connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      A94-21 (STA) - F54-5 (L) Always Below 1 Ω
      A94-17 (CLL) - F54-4 (B) Always Below 1 Ω
      A94-21 (STA) - Body ground Always 80 to 180 Ω
      A94-17 (CLL) - Body ground Always 10 kΩ or higher
      F54-5 (L) - Body ground Always 80 to 180 Ω
      F54-4 (B) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ENGINE STOP AND START ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR