ECD SYSTEM(w/ DPF) Starter Signal Circuit

DESCRIPTION


WIRING DIAGRAM

A01VH2NE03

CAUTION / NOTICE / HINT

CAUTION:


  • When replacing the ECM, the ECM needs Registration and Initialization Click here.

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

Tech Tips

When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the intelligent tester. Then after installing the new ECM, perform all of the initialization/registrations for the "Learning Values Write" function by following the instructions shown on the tester display.

PROCEDURE


  1. CHECK WHETHER ENGINE CAN BE CRANKED


    1. Check if the engine can be cranked.

      Result
      Result Proceed to
      Engine cannot be cranked A
      Engine can be cranked B

    B

    READ VALUE USING INTELLIGENT TESTER (STARTER SIGNAL) Click here

    A

  2. INSPECT STARTER RELAY ASSEMBLY


    1. Inspect the starter relay assembly Click here.


    NG

    REPLACE STARTER RELAY ASSEMBLY HOLDER

    OK

  3. 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. Check 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 OFF
      START ON

    NG

    READ VALUE USING INTELLIGENT TESTER (STARTER SIGNAL) Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (STARTER RELAY HOLDER TERMINAL VOLTAGE)


    1. A01VLZ6E02
      Text in Illustration
      *1 Engine Room Relay Block
      *2 Starter Relay Holder

      Remove the starter relay assembly from the engine room relay block.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      2 (Starter relay holder) - Body ground Cranking 11 to 14 V
      5 (Starter relay holder) - Body ground Always 11 to 14 V
      Result
      Result Proceed to
      Normal A
      Abnormal (Starter relay holder terminal 2) B
      Abnormal (Starter relay holder terminal 5) C

    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - STARTER RELAY ASSEMBLY HOLDER)

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - STARTER RELAY ASSEMBLY HOLDER)

    A

  5. CHECK HARNESS AND CONNECTOR (STARTER RELAY ASSEMBLY HOLDER - BODY GROUND)


    1. Remove the starter relay assembly 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 (Starter relay holder) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HARNESS AND CONNECTOR (STARTER ASSEMBLY - STARTER RELAY ASSEMBLY HOLDER)


    1. Remove the starter relay assembly from the engine room relay block.

    2. Disconnect the starter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B1-1 - 3 (Starter relay holder) Always Below 1 Ω
      B1-1 or 3 (Starter relay holder) - Body ground Always 10 kΩ or higher

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  7. READ VALUE USING INTELLIGENT TESTER (STARTER SIGNAL)


    1. Disconnect the power management control ECU connector.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the tester on.

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

    6. Check 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 OFF
      START ON
      Result
      Result Proceed to
      OK A
      NG*1 B
      NG*2 C

      • *1: for Manual Transaxle Models

      • *2: for Multi-Mode Manual Transaxle Models


    A

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    C

    CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY TERMINAL VOLTAGE) Click here

    B

  8. CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH TERMINAL VOLTAGE)


    1. A01VF8KE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Clutch Start Switch Assembly)

      Disconnect the clutch start switch connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A39-2 - Body ground Cranking 11 to 14 V

    NG

    CHECK HARNESS AND CONNECTOR (IGNITION SWITCH TERMINAL VOLTAGE) Click here

    OK

  9. INSPECT CLUTCH START SWITCH ASSEMBLY


    1. Inspect the clutch start switch assembly Click here.


    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - CLUTCH START SWITCH ASSEMBLY - POWER MANAGEMENT CONTROL ECU - STARTER RELAY ASSEMBLY HOLDER)

    NG

    REPLACE CLUTCH START SWITCH ASSEMBLY

  10. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY TERMINAL VOLTAGE)


    1. A01VKG1E02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Park/neutral Position Switch Assembly)

      Disconnect the park/neutral position switch connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      E2-2 - Body ground Cranking 11 to 14 V

    NG

    CHECK HARNESS AND CONNECTOR (IGNITION SWITCH TERMINAL VOLTAGE) Click here

    OK

  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 (TRANSMISSION CONTROL ECU ASSEMBLY TERMINAL VOLTAGE)


    1. A01VKKME02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Transmission Control ECU Assembly)

      Disconnect the transmission control ECU assembly connector.

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

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

    NG

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

    OK

  13. CHECK HARNESS AND CONNECTOR (ECM - TRANSMISSION CONTROL ECU ASSEMBLY - STARTER RELAY ASSEMBLY HOLDER)


    1. Disconnect the ECM connector.

    2. Disconnect the transmission control ECU assembly connector.

    3. Disconnect the power management control ECU connector.

    4. Remove the starter relay assembly from the engine room relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A59-6 (STA) - 2 (Starter relay holder) Always Below 1 Ω
      A47-6 (STRL) - 2 (Starter relay holder) Always Below 1 Ω
      A47-4 (STA) - 2 (Starter relay holder) Always Below 1 Ω
      A52-5 (STA) - 2 (Starter relay holder) Always Below 1 Ω
      A59-6 (STA) or A47-6 (STRL) or A47-4 (STA) or A52-5 (STA) or 2 (Starter relay holder) - Body ground Always 10 kΩ or higher

    OK

    CHECK MULTI-MODE MANUAL TRANSAXLE SYSTEM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  14. CHECK HARNESS AND CONNECTOR (IGNITION SWITCH TERMINAL VOLTAGE)


    1. A01VK7LE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Ignition Switch Assembly)

      Disconnect the ignition switch assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F13-5 (AM2) - Body ground Always 11 to 14 V

    NG

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

    OK

  15. INSPECT IGNITION SWITCH ASSEMBLY


    1. Inspect the ignition switch assembly Click here.

      Result
      Result Proceed to
      NG A
      OK*1 B
      OK*2 C

      • *1: for Manual Transaxle Models

      • *2: for Multi-Mode Manual Transaxle Models


    A

    REPLACE IGNITION SWITCH ASSEMBLY Click here

    B

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

    C

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

  16. 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. Check 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 OFF
      START ON

    OK

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

    NG

  17. CHECK HARNESS AND CONNECTOR (ECM - STARTER RELAY ASSEMBLY HOLDER)


    1. Disconnect the ECM connector.

    2. Disconnect the power management control ECU connector.

    3. Disconnect the park/neutral position switch assembly or clutch start switch assembly connector.

    4. Remove the starter relay assembly from the engine room relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A59-6 (STA) - 2 (Starter relay holder) Always Below 1 Ω

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR