SFI SYSTEM (w/ Secondary Air Injection System) Starter Signal Circuit

DESCRIPTION

While the engine is being cranked, current flows from terminal ST2 of the ignition switch through the park/neutral position switch (for A/T) or directly (for M/T) to terminal STA of the ECM (STA signal).

WIRING DIAGRAM

A01J3XNE08

INSPECTION PROCEDURE

Note

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

Tech Tips

This inspection procedure is based on the premise that the engine can crank normally. If the engine cannot crank normally, proceed to the problem symptoms table Click here.

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 intelligent tester on.

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

    5. Read the value.

      OK
      Ignition Switch Position Starter Signal
      ON OFF
      START ON

    NG

    CHECK STARTER (ST) RELAY (POWER SOURCE) Click here

    OK

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

  2. CHECK STARTER (ST) RELAY (POWER SOURCE)


    1. A01J6WSE01
      Text in Illustration
      *1 Starter (ST) Relay
      *2 Engine Room Relay Block and Junction Block Assembly

      Remove the starter (ST) relay from the engine room relay block and junction block.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      Starter (ST) relay terminal 1 - Body ground Engine cranking 11 to 14 V

      Tech Tips

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

      Result
      Result Proceed to
      OK A
      NG (for Manual Transmission) B
      NG (for Automatic Transmission) C

    B

    CHECK HARNESS AND CONNECTOR (STARTER (ST) RELAY - IGNITION SWITCH) Click here

    C

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

    A

  3. INSPECT STARTER (ST) RELAY


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


    NG

    REPLACE STARTER (ST) RELAY

    OK

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


    1. Remove the starter (ST) relay from the engine room relay block and junction block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Starter (ST) relay terminal 2 - Body ground Always Below 1 Ω
      Result
      Result Proceed to
      OK (for Manual Transmission) A
      OK (for Automatic Transmission) B
      NG C

    B

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

    C

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

    A

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

  5. CHECK HARNESS AND CONNECTOR (STARTER (ST) RELAY - IGNITION SWITCH)


    1. Remove the starter (ST) relay from the engine room relay block and junction block.

    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
      Starter (ST) relay terminal 1 - I8-7 (ST2) Always Below 1 Ω
      Starter (ST) relay terminal 1 or I8-7 (ST2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (STARTER (ST) RELAY - IGNITION SWITCH)

    OK

  6. INSPECT IGNITION SWITCH ASSEMBLY


    1. Inspect the ignition switch assembly Click here.


    NG

    REPLACE IGNITION SWITCH ASSEMBLY Click here

    OK

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

  7. CHECK HARNESS AND CONNECTOR (STARTER (ST) RELAY - PARK/NEUTRAL POSITION SWITCH)


    1. Remove the starter (ST) relay from the engine room relay block.

    2. Disconnect the park/neutral position switch connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      ST relay terminal 1 - N4-5 (L) Always Below 1 Ω
      ST relay terminal 1 or N4-5 (L) - Body ground Always 10 kΩ or higher

    NG

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

    OK

  8. 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

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


    1. Disconnect the park/neutral position 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
      N4-4 (B) - I8-7 (ST2) Always Below 1 Ω
      N4-4 (B) or I8-7 (ST2) - Body ground Always 10 kΩ or higher

    NG

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

    OK

  10. INSPECT IGNITION SWITCH ASSEMBLY


    1. Inspect the ignition switch assembly Click here.


    NG

    REPLACE IGNITION SWITCH ASSEMBLY Click here

    OK

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