STOP AND START SYSTEM(for 3ZR-FAE) Neutral Position Switch Circuit

DESCRIPTION

The neutral position switch detects whether the shift lever is in neutral. When the shift lever in any position other than neutral, stop and start control is prohibited. (for Manual Transaxle)

The engine stop and start ECU uses the park/neutral position switch assembly installed to the continuously variable transaxle assembly to detect when the shift lever is in P or N. (for CVT)

WIRING DIAGRAM


  1. for CVT:

    A01QUNKE09

  2. for Manual Transaxle:

    A01QTE5E14
    *a Neutral Position Switch
    *b Engine Stop and Start ECU

PROCEDURE


  1. CONFIRM MODEL


    1. Choose the model to be inspected.

      Result
      Result Proceed to
      for CVT A
      for Manual Transaxle B

    B

    READ VALUE USING GTS (NEUTRAL SWITCH) Click here

    A

  2. READ VALUE USING GTS (NEUTRAL SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    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

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

    NG

  3. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY


    1. Inspect the park/neutral position switch assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

    OK

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


    1. Disconnect the A66 engine stop and start ECU connector.

    2. Disconnect the B36 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
      A66-21 (STA) - B36-9 (L) Always Below 1 Ω
      A66-17 (CLL) - B36-4 (B) Always Below 1 Ω
      A66-21 (STA) - Body ground Always 80 to 180 Ω
      A66-17 (CLL) - Body ground Always 10 kΩ or higher
      B36-9 (L) - Body ground Always 80 to 180 Ω
      B36-4 (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

  5. READ VALUE USING GTS (NEUTRAL SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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


      Powertrain > Stop and Start > Data List
      Tester Display
      Neutral Switch

    5. Read the value when the shift lever is in neutral and any other position

      OK
      Tester Display Condition Normal Condition
      Neutral Switch Shift lever is in neutral ON
      Shift lever is in any position other than neutral OFF
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

  6. CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - NEUTRAL POSITION SWITCH)


    1. Disconnect the A36 engine stop and start ECU connector.

    2. Disconnect the B104 neutral position switch connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A36-4 (NPS) - B104-2 (TMN) Always Below 1 Ω
      B104-1 (TME) - Body ground Always Below 1 Ω
      A36-4 (NPS) - Body ground Always 10 kΩ or higher
      B104-2 (TMN) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. INSPECT NEUTRAL POSITION SWITCH ASSEMBLY


    1. Inspect the neutral position switch assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE NEUTRAL POSITION SWITCH ASSEMBLY Click here