SFI SYSTEM Starter Signal Circuit

DESCRIPTION

While the engine is being cranked, current flows from terminal ST1 of the ignition switch to the clutch start switch or the park/neutral position switch and also flows to terminal STA of the ECM (STA Signal).

WIRING DIAGRAM

A0119EJE01

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (STARTER SIGNAL)


    1. Connect an intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester on.

    4. Enter the following menus: Powertrain / Engine and ECT / Data List / Starter Signal.

    5. Check the result when the ignition switch is turned ON and the engine starts.

      OK
      Condition Starter Signal
      Ignition switch ON OFF
      Engine start ON
      Result
      Result Proceed to

      Outside standard range

      (for Manual Transaxle)

      		 A

      Outside standard range

      (for CVT)

      		 B

      Within standard range

      (for Manual Transaxle)

      		 C

      Within standard range

      (for CVT)

      		 D

    B

    INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

    C

    CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH - ECM - ST RELAY) Click here

    D

    CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM - ST RELAY) Click here

    A

  2. READ VALUE USING INTELLIGENT TESTER (STARTER SIGNAL)


    1. Disconnect the engine stop and start ECU connector.

    2. Connect an intelligent tester to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the tester on.

    5. Enter the following menus: Powertrain / Engine and ECT / Data List / Starter Signal.

    6. Check the result when the ignition switch is turned ON and the engine starts.

      OK
      Condition Starter Signal
      Ignition switch ON OFF
      Engine start ON
      Result
      Result Proceed to
      NG A
      OK B

    7. Reconnect the engine stop and start ECU connector.


    B

    REPLACE ENGINE STOP AND START ECU Click here

    A

  3. INSPECT CLUTCH START SWITCH ASSEMBLY

    A0118J0E14

    1. Remove the clutch start switch assembly.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1 - 2 ON (pushed) Below 1 Ω
      1 - 2 OFF (free) 10 kΩ or higher

    3. Install the clutch start switch assembly.


    NG

    REPLACE CLUTCH START SWITCH ASSEMBLY Click here

    OK

  4. INSPECT IGNITION SWITCH ASSEMBLY

    A011B1DE03

    1. Disconnect the ignition switch assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      2 (AM1) - 1 (ST1) START position Below 1 Ω

    3. Reconnect the ignition switch assembly connector.


    NG

    REPLACE IGNITION SWITCH ASSEMBLY Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (IGNITION SWITCH - CLUTCH START SWITCH)


    1. Disconnect the ignition switch assembly connector.

    2. Disconnect the clutch start switch assembly connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      D28-1 (ST1) - A29-2 Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      D28-1 (ST1) or A29-2 - Body ground Always 10 kΩ or higher

    4. Reconnect the ignition switch assembly connector.

    5. Reconnect the clutch start switch assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH - ECM - ST RELAY)


    1. Remove the ST relay.

    2. Disconnect the ECM connector.

    3. Disconnect the clutch start switch assembly connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      ST relay terminal 2 - A18-48 (STA) Always Below 1 Ω
      ST relay terminal 2 - A29-1 Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A18-48 (STA) or A29-1 - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      Outside standard range A
      Within standard range B

    5. Reconnect the clutch start switch assembly connector.

    6. Reconnect the ECM connector.

    7. Reinstall the ST relay.


    B

    INSPECT BATTERY Click here

    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  7. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY

    A011857E02
    Text in Illustration
    *1

    Component without harness connected

    (Park/Neutral Position Switch assembly)

    1. Disconnect the park/neutral position switch assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      4 - 5 Shift position P, N Below 1 Ω

    3. Reconnect the park/neutral start switch assembly connector.


    NG

    REPAIR OR REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

    OK

  8. INSPECT IGNITION SWITCH ASSEMBLY

    A011B1DE03

    1. Disconnect the ignition switch assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      2 (AM1) - 1 (ST1) START position Below 1 Ω

    3. Reconnect the ignition switch assembly connector.


    NG

    REPLACE IGNITION SWITCH ASSEMBLY Click here

    OK

  9. CHECK HARNESS AND CONNECTOR (IGNITION SWITCH - PARK/NEUTRAL POSITION SWITCH)


    1. Disconnect the ignition switch assembly connector.

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

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      D28-1 (ST1) - B13-4 Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      D28-1 (ST1) or B13-4 - Body ground Always 10 kΩ or higher

    4. Reconnect the park/neutral position switch assembly connector.

    5. Reconnect the ignition switch assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM - ST RELAY)


    1. Remove the ST relay from the engine room relay block.

    2. Disconnect the ECM connector.

    3. Disconnect the park/neutral position switch assembly connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      ST relay terminal 2 - A18-48 (STA) Always Below 1 Ω
      ST relay terminal 2 - B13-5 Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A18-48 (STA) or B13-5 - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      Outside standard range A
      Within standard range B

    5. Reconnect the park/neutral position switch assembly connector.

    6. Reconnect the ECM connector.

    7. Reinstall the ST relay.


    B

    INSPECT BATTERY Click here

    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  11. INSPECT BATTERY


    1. Check that the battery is not depleted.

      OK
      Battery is not depleted.

    NG

    REPLACE BATTERY

    OK

  12. CHECK BATTERY TERMINAL


    1. Check that the battery terminals are not loose or corroded.

      OK
      Battery terminals are not loose or corroded.

    NG

    REPAIR OR REPLACE BATTERY TERMINAL

    OK

    REPAIR OR REPLACE STARTER CIRCUIT (STARTER - ST RELAY)