STOP AND START SYSTEM Neutral Position Switch Circuit

DTC Code DTC Name
Neutral Position Switch Circuit

DESCRIPTION

The neutral position sensor (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.

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

      OK

      GTS Display

      Condition

      Normal Condition

      Neutral Switch

      Shift lever is in neutral

      ON

      Shift lever is in any position other than neutral

      OFF

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

    (Click here)

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

    1. Disconnect the A74 engine stop and start ECU connector.

    2. Disconnect the D7 neutral position sensor (neutral position switch) connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A74-26 (TMVC) - D7-1 (W1)

      Always

      Below 1 Ω

      A74-25 (TME2) - D7-3 (F+)

      Always

      Below 1 Ω

      A74-27 (TMN) - D7-2 (TMN)

      Always

      Below 1 Ω

      A74-26 (TMVC) - Body ground

      Always

      10 kΩ or higher

      D7-1 (W1) - Body ground

      Always

      10 kΩ or higher

      A74-25 (TME2) - Body ground

      Always

      10 kΩ or higher

      D7-3 (F+) - Body ground

      Always

      10 kΩ or higher

      A74-27 (TMN) - Body ground

      Always

      10 kΩ or higher

      D7-2 (TMN) - Body ground

      Always

      10 kΩ or higher

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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

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

      U122074E02
      Table 1. Text in Illustration

      *a

      Component with harness connected

      (Engine Stop and Start ECU)

      -

      -

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      A74-27 (TMN) - A74-25 (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

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

    (Click here)

    REPLACE NEUTRAL POSITION SWITCH

    (Click here)