SFI SYSTEM Starter Signal Circuit

DESCRIPTION

While the engine is being cranked, current flows from terminal ST2 of the ignition switch assembly*1 or terminal STAR of the certification ECU (smart key ECU assembly)*2 to the park/neutral position switch*3 or clutch start switch*4 and to terminal STA of the ECM (STA signal).


WIRING DIAGRAM

Refer to DTC P0617 Click here.

PROCEDURE


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

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

    w/ Entry and Start System

    (for automatic transmission models)

    		 B

    w/ Entry and Start System

    (for manual transmission models)

    		 C

    B

    INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

    C

    CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH, CLUTCH START SWITCH - ECM) Click here

    A

  2. 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

  3. INSPECT STARTER RELAY (ST)


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


    NG

    REPLACE STARTER RELAY (ST)

    OK

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


    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
      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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (POWER SOURCE)

    B001Y5VE01
    Text in Illustration
    *1 Engine Room Relay Block Assembly
    *2 ST Relay

    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 (5) - Body ground Always 11 to 14 V

    NG

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

    OK

  6. INSPECT STARTER


    1. Inspect the starter Click here.


    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    NG

    REPLACE STARTER Click here

  7. INSPECT CLUTCH START SWITCH ASSEMBLY


    1. Inspect the clutch start switch Click here.


    NG

    REPLACE CLUTCH START SWITCH ASSEMBLY Click here

    OK

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


    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
      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

    NG

    REPLACE IGNITION SWITCH ASSEMBLY Click here

    OK

  9. INSPECT IGNITION SWITCH ASSEMBLY


    1. Inspect the ignition switch assembly Click here.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    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
      Tester Connection Condition Specified Condition
      A49-1 - E93-7 (ST2) Always Below 1 Ω
      A49-1 or E93-7 (ST2) - Body ground Always 10 kΩ or higher

    OK

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

    NG

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

  11. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY


    1. Inspect the park/neutral position switch assembly Click here.


    NG

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

    OK

  12. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH, CLUTCH START SWITCH - ECM)


    1. Disconnect the park/neutral position switch connector.

    2. Disconnect the clutch start switch connector.

    3. Disconnect the ECM connector.

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

      Standard Resistance
      for Manual Transmission Models
      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 Automatic Transmission Models
      Tester Connection Condition Specified Condition
      C24-5 (L) - A38-16 (STA) Always Below 1 Ω
      C24-5 (L) or A38-16 (STA) - Body ground Always 10 kΩ or higher

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR