SFI SYSTEM Starter Signal Circuit

DESCRIPTION


WIRING DIAGRAM

A005GEYE05
A005L59E03

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (STARTER SIGNAL)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester on.

    4. Enter the following menu items: Powertrain / Engine and ECT / Data List / All Data / Starter Signal.

    5. Fully depress the clutch pedal.

    6. Read the value displayed on the intelligent tester when the ignition switch is turned to the ON position and start positions.

      OK
      Ignition Switch Position Starter Signal
      ON Close
      START Open
      Result
      Result Proceed to
      OK A
      NG (for Manual Transaxle) B
      NG (for CVT) C

    A

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    C

    CHECK ST RELAY (POWER SOURCE) Click here

    B

  2. CHECK ST RELAY (POWER SOURCE)


    1. A005HVRE07
      Text in Illustration
      *1 Engine Room Main Relay Block
      *2 ST Relay Holder

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

    2. Fully depress the clutch pedal.

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

      Standard Voltage
      Tester Connection Ignition Switch Position Specified Condition
      ST relay terminal 2 - Body ground START 11 to 14 V

      Tech Tips

      The engine will not crank because the relay is not installed.

    4. Reinstall the ST relay.


    NG

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

    OK

  3. INSPECT ST RELAY


    1. Inspect the ST relay Click here.


    NG

    REPLACE ST RELAY

    OK

  4. CHECK HARNESS AND CONNECTOR (ST RELAY - BODY GROUND)


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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      ST relay terminal 1 - Body ground Always Below 1 Ω

    3. Reinstall the ST relay.


    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - CLUTCH START SWITCH ASSEMBLY)

    NG

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

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


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

    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
      ST relay terminal 2 - A39-1 Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      ST relay terminal 2 or A39-1 - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (w/ Stop and Start System) A
      OK (w/o Stop and Start System) B
      NG C

    4. Reinstall the ST relay.

    5. Reconnect the clutch start switch assembly connector.


    B

    CHECK HARNESS AND CONNECTOR (ST RELAY - POWER MANAGEMENT CONTROL ECU) Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ST RELAY - CLUTCH START SWITCH ASSEMBLY)

    A

  6. CHECK HARNESS AND CONNECTOR (ST RELAY - ENGINE STOP AND START ECU)


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

    2. Disconnect the engine stop and start ECU connector.

    3. 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 - A53-4 (STA) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      ST relay terminal 2 or A53-4 (STA) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      NG A
      OK B

    4. Reinstall the ST relay.

    5. Reconnect the engine stop and start ECU connector.


    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ST RELAY - ENGINE STOP AND START ECU)

    B

    INSPECT CLUTCH START SWITCH ASSEMBLY Click here

  7. CHECK HARNESS AND CONNECTOR (ST RELAY - POWER MANAGEMENT CONTROL ECU)


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

    2. Disconnect the power management control ECU connector.

    3. 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 - A52-5 (STA) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      ST relay terminal 2 or A52-5 (STA) - Body ground Always 10 kΩ or higher

    4. Reinstall the ST relay.

    5. Reconnect the power management control ECU connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ST RELAY - POWER MANAGEMENT CONTROL ECU)

    OK

  8. INSPECT CLUTCH START SWITCH ASSEMBLY


    1. Inspect the clutch start switch assembly Click here.


    NG

    REPLACE CLUTCH START SWITCH ASSEMBLY Click here

    OK

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


    1. Disconnect the clutch start switch assembly connector.

    2. Disconnect the ignition 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
      A39-2 - F13-7 (ST2) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A39-2 or F13-7 (ST2) - Body ground Always 10 kΩ or higher

    4. Reconnect the clutch start switch assembly connector.

    5. Reconnect the ignition switch assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (CLUTCH START SWITCH ASSEMBLY - IGNITION SWITCH ASSEMBLY)

    OK

  10. INSPECT IGNITION SWITCH ASSEMBLY


    1. A005KCPE01
      Text in Illustration
      *a

      Component without harness connected

      (Ignition Switch Assembly)

      Disconnect the ignition switch assembly connector.

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

      Standard Resistance
      Tester Connection Ignition Switch Position Specified Condition
      All terminals LOCK 10 kΩ or higher
      5 (AM2) - 7 (ST2) START Below 1 Ω

    3. Reconnect the ignition switch assembly connector.


    OK

    REPLACE HARNESS OR CONNECTOR (IGNITION SWITCH ASSEMBLY - BATTERY)

    NG

    REPLACE IGNITION SWITCH ASSEMBLY Click here

  11. CHECK ST RELAY (POWER SOURCE)


    1. A005HVRE07
      Text in Illustration
      *1 Engine Room Main Relay Block
      *2 ST Relay Holder

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

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

      Standard Voltage
      Tester Connection Ignition Switch Position Specified Condition
      ST relay terminal 2 - Body ground START 11 to 14 V

      Tech Tips

      The engine will not crank because the relay is not installed.

    3. Reinstall the ST relay.


    NG

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

    OK

  12. INSPECT ST RELAY


    1. Inspect the ST relay Click here.


    NG

    REPLACE ST RELAY

    OK

  13. CHECK HARNESS AND CONNECTOR (ST RELAY - BODY GROUND)


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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      ST relay terminal 1 - Body ground Always Below 1 Ω

    3. Reinstall the ST relay.


    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - PARK/NEUTRAL POSITION SWITCH ASSEMBLY)

    NG

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

  14. CHECK HARNESS AND CONNECTOR (ST RELAY - PARK/NEUTRAL POSITION SWITCH ASSEMBLY)


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

    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
      ST relay terminal 2 - B69-9 (L) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      ST relay terminal 2 or B69-9 (L) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (w/ Stop and Start System) A
      OK (w/o Stop and Start System) B
      NG C

    4. Reinstall the ST relay.

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


    B

    CHECK HARNESS AND CONNECTOR (ST RELAY - POWER MANAGEMENT CONTROL ECU) Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ST RELAY - PARK/NEUTRAL POSITION SWITCH ASSEMBLY)

    A

  15. CHECK HARNESS AND CONNECTOR (ST RELAY - ENGINE STOP AND START ECU)


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

    2. Disconnect the engine stop and start ECU connector.

    3. 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 - A53-4 (STA) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      ST relay terminal 2 or A53-4 (STA) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      NG A
      OK B

    4. Reinstall the ST relay.

    5. Reconnect the engine stop and start ECU connector.


    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ST RELAY - ENGINE STOP AND START ECU)

    B

    INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

  16. CHECK HARNESS AND CONNECTOR (ST RELAY - POWER MANAGEMENT CONTROL ECU)


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

    2. Disconnect the power management control ECU connector.

    3. 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 - A52-5 (STA) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      ST relay terminal 2 or A52-5 (STA) - Body ground Always 10 kΩ or higher

    4. Reinstall the ST relay.

    5. Reconnect the power management control ECU connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ST RELAY - POWER MANAGEMENT CONTROL ECU)

    OK

  17. 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

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


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

    2. Disconnect the ignition 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
      B69-4 (B) - F13-7 (ST2) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      B69-4 (B) or F13-7 (ST2) - 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 (PARK/NEUTRAL POSITION SWITCH ASSEMBLY - IGNITION SWITCH)

    OK

  19. INSPECT IGNITION SWITCH ASSEMBLY


    1. A005KCPE01
      Text in Illustration
      *a

      Component without harness connected

      (Ignition Switch Assembly)

      Disconnect the ignition switch assembly connector.

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

      Standard Resistance
      Tester Connection Ignition Switch Position Specified Condition
      All terminals LOCK 10 kΩ or higher
      5 (AM2) - 7 (ST2) START Below 1 Ω

    3. Reconnect the ignition switch assembly connector.


    OK

    REPLACE HARNESS OR CONNECTOR (IGNITION SWITCH ASSEMBLY - BATTERY)

    NG

    REPLACE IGNITION SWITCH ASSEMBLY Click here