STOP AND START SYSTEM(for 1AD-FTV) Neutral Position Switch Circuit

DTC Code DTC Name
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.

WIRING DIAGRAM

Refer to DTC P1780.

Click here

PROCEDURE

  1. 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

    NG

    OK
    OK

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

    Click here

    NG

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

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

    2. Disconnect the B63 neutral position switch connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A66-26 (TMVC) - B63-1 (W1)

      Always

      Below 1 Ω

      A66-25 (TME2) - B63-3 (F+)

      Always

      Below 1 Ω

      A66-27 (TMN) - B63-2 (TMN)

      Always

      Below 1 Ω

      A66-26 (TMVC) - Body ground

      Always

      10 kΩ or higher

      B63-1 (W1) - Body ground

      Always

      10 kΩ or higher

      A66-25 (TME2) - Body ground

      Always

      10 kΩ or higher

      B63-3 (F+) - Body ground

      Always

      10 kΩ or higher

      A66-27 (TMN) - Body ground

      Always

      10 kΩ or higher

      B63-2 (TMN) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK ENGINE STOP AND START ECU (TMN TERMINAL VOLTAGE)

    1. Measure the voltage according to the value(s) in the table below.

      A285225C28

      *a

      Component with harness connected

      (Engine Stop and Start ECU)

      -

      -

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      A66-27 (TMN) - A66-25 (TME2)

      Ignition switch ON, shift lever in neutral

      2.7 to 4.3 V

      Ignition switch ON, shift lever in any position other than neutral

      0.7 to 1.9 V

    Result

    Proceed to

    OK

    NG
    OK

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

    Click here

    NG

    REPLACE NEUTRAL POSITION SWITCH

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