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STOP AND START SYSTEM Neutral Position Switch Circuit

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DTC Code DTC Name
  Neutral Position Switch Circuit
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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.

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WIRING DIAGRAM

Refer to DTC P1780 (Click here).

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INSPECTION PROCEDURE

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PROCEDURE


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    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

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    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

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    CHECK ENGINE STOP AND START ECU (TMN TERMINAL VOLTAGE)


    1. A01IOHTE19

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

      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

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    GO TO PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLEClick here

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    REPAIR OR REPLACE HARNESS OR CONNECTOR

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    GO TO PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLEClick here

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    REPLACE NEUTRAL POSITION SWITCHClick here