ECD SYSTEM (w/ DPF) Starter Signal Circuit

DESCRIPTION

While the engine is being cranked, current flows from terminal STAR of the power management control ECU to the park/neutral position switch and also flows to terminal STA of the ECM (STA Signal).

WIRING DIAGRAM

Refer to DTC P0617 Click here.

INSPECTION PROCEDURE

Note


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

  • After replacing the ECM, the new ECM needs registration Click here and initialization Click here.

  • After replacing the fuel supply pump assembly, the ECM needs initialization Click here.

  • After replacing an injector assembly, the ECM needs registration Click here.

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 engine switch on (IG).

    3. Turn the tester on.

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

    5. Read the value.

      OK
      Engine Switch Condition Starter Signal
      On (IG) OFF
      START ON

    NG

    CHECK ST RELAY (POWER SOURCE) Click here

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

  2. CHECK ST RELAY (POWER SOURCE)


    1. A01DTCBE01
      Text in Illustration
      *1 Engine Room Relay Block
      *2 ST Relay

      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
      ST relay terminal 5 - 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

    3. Reinstall the ST relay.


    B

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

    C

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


    NG

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

    OK

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

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


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

    2. Disconnect the clutch pedal switch assembly connector.

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

      Standard Resistance (Check for Open)
      for LHD
      Tester Connection Condition Specified Condition
      ST relay terminal 2 - A41-1 Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      ST relay terminal 2 - r1-1 Always Below 1 Ω
      Standard Resistance (Check for Short)
      for LHD
      Tester Connection Condition Specified Condition
      ST relay terminal 2 or A41-1 - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      ST relay terminal 2 or r1-1 - Body ground Always 10 kΩ or higher

    4. Reinstall the ST relay.

    5. Reconnect the clutch pedal switch assembly connector.


    NG

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

    OK

  6. CHECK HARNESS AND CONNECTOR (CLUTCH PEDAL SWITCH ASSEMBLY - POWER MANAGEMENT CONTROL ECU)


    1. Disconnect the clutch pedal switch assembly connector.

    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)
      for LHD
      Tester Connection Condition Specified Condition
      A41-2 - G50-3 (STAR) Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      r1-2 - G50-3 (STAR) Always Below 1 Ω
      Standard Resistance (Check for Short)
      for LHD
      Tester Connection Condition Specified Condition
      A41-2 or G50-3 (STAR) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      r1-2 or G50-3 (STAR) - Body ground Always 10 kΩ or higher

    4. Reconnect the clutch pedal switch assembly connector.

    5. Reconnect the power management control ECU connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (CLUTCH PEDAL SWITCH ASSEMBLY - POWER MANAGEMENT CONTROL ECU)

    OK

  7. INSPECT CLUTCH PEDAL SWITCH


    1. Inspect the clutch pedal switch assembly Click here.


    NG

    REPLACE CLUTCH PEDAL SWITCH Click here

    OK

    GO TO ENTRY AND START SYSTEM Click here

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


    1. Remove the 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 (Check for Open)
      Tester Connection Condition Specified Condition
      ST relay terminal 2 - C40-5 Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      ST relay terminal 2 or C40-5 - Body ground Always 10 kΩ or higher

    4. Reinstall the ST relay.

    5. Reconnect the park/neutral position switch connector.


    NG

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

    OK

  9. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - POWER MANAGEMENT CONTROL ECU)


    1. Disconnect the park/neutral position switch connector.

    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
      C40-4 - G50-3 (STAR) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      C40-4 or G50-3 (STAR) - Body ground Always 10 kΩ or higher

    4. Reconnect the park/neutral position switch connector.

    5. Reconnect the power management control ECU connector.


    NG

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

    OK

  10. 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

    GO TO ENTRY AND START SYSTEM Click here