ECD SYSTEM Starter Signal Circuit

DESCRIPTION


WIRING DIAGRAM

A005KFFE01

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 values.

      OK
      Ignition Switch Position Starter Signal
      ON OFF
      START ON

    OK

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

    NG

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      ST relay terminal 2 - Body ground Engine cranking 11 to 14 V

    3. Reinstall the ST relay.

      Result
      Result Proceed to
      OK A
      NG (Manual transaxle) B
      NG (Multi-mode manual transaxle) C

    B

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

    C

    CHECK HARNESS AND CONNECTOR (ST RELAY - TRANSMISSION CONTROL ECU ASSEMBLY) Click here

    A

  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. Reconnect the ST relay.

      Result
      Result Proceed to
      OK (Manual transaxle) A
      OK (Multi-mode manual transaxle) B
      NG C

    A

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

    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - TRANSMISSION CONTROL ECU ASSEMBLY)

    C

    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

    4. Reinstall the ST relay.

    5. Reconnect the clutch start switch assembly connector.


    NG

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

    OK

  6. INSPECT CLUTCH START SWITCH ASSEMBLY


    1. Inspect the clutch start switch assembly Click here.


    NG

    REPLACE CLUTCH START SWITCH ASSEMBLY Click here

    OK

  7. 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

  8. 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

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

    NG

    REPLACE IGNITION SWITCH ASSEMBLY Click here

  9. CHECK HARNESS AND CONNECTOR (ST RELAY - TRANSMISSION CONTROL ECU ASSEMBLY)


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

    2. Disconnect the transmission control ECU 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 - A47-4 (STRL) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      ST relay terminal 2 or A47-4 (STRL) - Body ground Always 10 kΩ or higher

    4. Reinstall the ST relay.

    5. Reconnect the transmission control ECU assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ST RELAY - TRANSMISSION CONTROL ECU ASSEMBLY)

    OK

  10. CHECK TCM (TMN VOLTAGE)


    1. A005LSCE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to TCM)

      Disconnect the transmission control ECU assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A47-3 (TMN) - Body ground Engine cranking 11 to 14 V

    3. Reconnect the transmission control ECU assembly connector.


    OK

    REPLACE TRANSMISSION CONTROL ECU ASSEMBLY Click here

    NG

  11. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL ECU - PARK/NEUTRAL POSITION SWITCH)


    1. Disconnect the transmission control 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 (Check for Open)
      Tester Connection Condition Specified Condition
      A47-3 (TMN) - E2-1 Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A47-3 (TMN) or E2-1 - Body ground Always 10 kΩ or higher

    4. Reconnect the transmission control ECU assembly connector.

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


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION CONTROL ECU - PARK/NEUTRAL POSITION SWITCH)

    OK

  12. 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

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


    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
      E2-2 - F13-7 (ST2) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      E2-2 or F13-7 (ST2) - Body ground Always 10 kΩ or higher

    4. Reconnect the park/neutral position switch connector.

    5. Reconnect the ignition switch connector.


    NG

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

    OK

  14. 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

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

    NG

    REPLACE IGNITION SWITCH ASSEMBLY Click here