SFI SYSTEM Starter Signal Circuit

DESCRIPTION

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

WIRING DIAGRAM

Refer to DTC P0617 Click here.

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING GTS (STARTER SIGNAL)


    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 / Engine and ECT / Data List / Starter Signal.

    5. Read values.

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

      OK
      Condition Display (Starter Signal)
      Ignition switch ON OFF
      Engine is started ON

    NG

    INSPECT CLUTCH START SWITCH ASSEMBLY Click here

    OK

  2. INSPECT STARTER RELAY (ST)


    1. Inspect the starter relay (ST) Click here.


    NG

    REPLACE STARTER RELAY (ST)

    OK

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

    A015DPFE01

    1. Disconnect the clutch start switch.

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

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      ST relay (2) - A49-2 Always Below 1 Ω
      ST relay (2) or A49-2 - Body ground Always 10 kΩ or higher
      ST relay (1)* - A49-2 Always Below 1 Ω
      ST relay (1)* or A49-2 - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      ST relay (2) - e1-2 Always Below 1 Ω
      ST relay (2) or e1-2 - Body ground Always 10 kΩ or higher

      *: GRJ200L-GNANKC


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (POWER SOURCE)

    A015BWZE01

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

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      ST relay (1) - ST relay (5) Always 11 to 14 V
      ST relay (2)* - ST relay (5) Always 11 to 14 V

      *: GRJ200L-GNANKC


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (STARTER RELAY (ST) - BATTERY, BODY GROUND)

    OK

  5. INSPECT STARTER


    1. Inspect the starter Click here.


    NG

    REPLACE STARTER Click here

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (STARTER - STARTER RELAY (ST), BATTERY)

  6. INSPECT CLUTCH START SWITCH ASSEMBLY


    1. Inspect the clutch start switch (for LHD) Click here.

    2. Inspect the clutch start switch (for RHD) Click here.

      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE CLUTCH START SWITCH ASSEMBLY Click here

    C

    REPLACE CLUTCH START SWITCH ASSEMBLY Click here

    A

  7. CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH - ECM)

    A015A9ZE02

    1. Disconnect the clutch start switch connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      A49-2 - A38-46 (STA) Always Below 1 Ω
      A49-2 or A38-46 (STA) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      e1-2 - A52-46 (STA) Always Below 1 Ω
      e1-2 or A52-46 (STA) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK IF VEHICLE IS EQUIPPED WITH ENTRY AND START SYSTEM

    Result
    Result Proceed to
    w/ Entry and Start System A
    w/o Entry and Start System B

    B

    INSPECT IGNITION SWITCH ASSEMBLY Click here

    A

  9. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

  10. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Check the starter operation.

      OK
      Malfunction has been repaired successfully.

    NG

    GO TO ENTRY AND START SYSTEM (ENGINE DOES NOT START) Click here

    OK

    END

  11. INSPECT IGNITION SWITCH ASSEMBLY


    1. Inspect the ignition switch assembly Click here.


    NG

    REPLACE IGNITION SWITCH ASSEMBLY Click here

    OK

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

    A015B9UE25

    1. Disconnect the clutch start switch connector.

    2. Disconnect the ignition switch connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      A49-1 - E93-3 (ST1) Always Below 1 Ω
      A49-1 or E93-3 (ST1) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      e1-1 - E93-3 (ST1) Always Below 1 Ω
      e1-1 or E93-3 (ST1) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION SWITCH - BATTERY)