SFI SYSTEM Cranking Holding Function Circuit

DESCRIPTION


WIRING DIAGRAM

A01VHWBE03
A01VHWBE04

CAUTION / NOTICE / HINT

Note

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

Tech Tips

This chart is based on the premise that the engine can crank normally. If the engine cannot crank normally, proceed to 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 tester on.

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

    5. Read the value displayed on the tester when the ignition switch is turned to the ON and START positions.

      OK
      Ignition Switch Position Starter Signal
      ON Close (OFF)
      START Open (ON)

    OK
    NG
  2. CHECK ST RELAY (POWER SOURCE)

    A01VLZ6E01
    Text in Illustration
    *1 Engine room relay Block
    *2 ST Relay Holder

    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
      2 (ST relay holder) - Body ground Engine cranking 11 to 14 V
      Result
      Result Proceed to
      OK A
      NG (for Manual Transaxle) B
      NG (for CVT) C

    B
    C
    A
  3. INSPECT ST RELAY


    1. Inspect the ST relay Click here.


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


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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (ST relay holder) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      NG A
      OK (for Manual Transaxle) B
      OK (for CVT) C

    A
    B
    C
  5. INSPECT CLUTCH START SWITCH ASSEMBLY


    1. Inspect the clutch start switch assembly Click here.


    NG
    OK
  6. CHECK HARNESS AND CONNECTOR (ECM - CLUTCH START SWITCH ASSEMBLY)


    1. Disconnect the ECM connector.

    2. Disconnect the clutch start switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A58-22 (STA) - A39-1 Always Below 1 Ω
      A58-22 (STA) or A39-1 - Body ground Always 10 kΩ or higher

    NG
    OK
  7. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - CLUTCH START SWITCH ASSEMBLY)


    1. Disconnect the certification ECU (smart key ECU 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
      Tester Connection Condition Specified Condition
      F65-5 (STAR) - A39-2 Always Below 1 Ω
      F65-5 (STAR) or A39-2 - Body ground Always 10 kΩ or higher

    OK
    NG
  8. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY


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


    NG
    OK
  9. CHECK HARNESS AND CONNECTOR (ECM - PARK/NEUTRAL POSITION SWITCH ASSEMBLY)


    1. Disconnect the ECM 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
      Tester Connection Condition Specified Condition
      A58-22 (STA) - B69-9 (L) Always Below 1 Ω
      A58-22 (STA) or B69-9 (L) - Body ground Always 10 kΩ or higher

    NG
    OK
  10. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - PARK/NEUTRAL POSITION SWITCH ASSEMBLY)


    1. Disconnect the certification ECU (smart key ECU 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
      Tester Connection Condition Specified Condition
      F65-5 (STAR) - B69-4 (B) Always Below 1 Ω
      F65-5 (STAR) or B69-4 (B) - Body ground Always 10 kΩ or higher

    OK
    NG