MULTI-MODE MANUAL TRANSAXLE SYSTEM Starter Signal Circuit

DESCRIPTION

In this vehicle, the ST relay that supplies power to the starter motor is operated by the cranking holding function of the ECM. When the appropriate vehicle conditions are satisfied, the brake pedal is depressed and the transmission gear is in neutral, the engine can be cranked. If the brake pedal is not depressed or the transmission gear is not in neutral, the engine cannot be cranked.

During cranking, the ST relay operation signal (STA signal) is input into the STA terminal of the TCM, and is used to control the multi-mode manual transaxle system.

WIRING DIAGRAM

Refer to DTC P0617 Click here.

CAUTION / NOTICE / HINT

Tech Tips

If DTC P0703 is output, troubleshoot this code first.

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER


    1. Connect an intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester on.

    4. Enter the following menus: Powertrain / Multi-Mode M/T / Data List / STA Switch Signal.

    5. Check the value displayed on the tester when the ignition switch is turned is ON and the engine starts.

      Items

      [Abbreviation]

      		 Measurement Items: Display Normal Conditions Diagnostic Notes

      STA Switch Signal

      [STA SW Sig]

      STA signal:

      ON or OFF

      		 ON: During cranking -
      OK
      [ON] displays in the STA Switch Signal during cranking.

    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 Relay Block
      *2 ST Relay Holder

      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 2 - Body ground Engine cranking 11 to 14 V
      Result
      Result Proceed to
      OK A
      NG (w/o Entry and Start System) B
      NG (w/ Entry and Start System) C

    B

    CHECK HARNESS AND CONNECTOR (ST RELAY - TCM) Click here

    C

    CHECK HARNESS AND CONNECTOR (ST RELAY - PARK/NEUTRAL POSITION SWITCH 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 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 2 - Body ground Always Below 1 Ω

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - TCM)

    NG

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

  5. CHECK HARNESS AND CONNECTOR (ST RELAY - TCM)


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

    2. Disconnect the A47 TCM 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
      ST relay terminal 2 - A47-6 (STA)
      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
      ST relay terminal 2 or A47-6 (STA) - Body ground

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ST RELAY - TCM)

    OK

  6. CHECK TCM (TMN VOLTAGE)


    1. A005LSCE02
      Text In Illustration
      *a

      Front view of wire harness connector

      (to TCM)

      Disconnect the A47 TCM 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

    NG

    CHECK HARNESS AND CONNECTOR (TCM - PARK/NEUTRAL POSITION SWITCH) Click here

    OK

  7. REPLACE TCM


    1. Replace the TCM Click here.


    NEXT

  8. PERFORM INITIALIZATION


    1. Perform the initialization and learning for multi-mode manual transaxle system Click here.


    NEXT

    END

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


    1. Disconnect the A47 TCM connector.

    2. Disconnect the E2 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

    NG

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

    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

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


    1. Disconnect the E2 park/neutral position switch assembly connector.

    2. Disconnect the F13 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

    NG

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

    OK

  12. INSPECT IGNITION SWITCH ASSEMBLY


    1. A005KCPE01
      Text In Illustration
      *a

      Component without harness connected

      (Ignition Switch Assembly)

      Disconnect the F13 ignition switch assembly connector.

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

      Standard resistance
      Tester Connection Switch Condition Specified Condition
      All terminals LOCK 10 kΩ or higher
      5 (AM2) - 7 (ST2) START Below 1 Ω

    OK

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

    NG

    REPLACE IGNITION SWITCH ASSEMBLY Click here

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


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

    2. Disconnect the E2 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 Switch Condition Specified Condition
      ST relay terminal 2 - E2- 1 Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Switch Condition Specified Condition
      ST relay terminal 2 or E2-1 - Body ground Always 10 kΩ or higher

    NG

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

    OK

  14. 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

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


    1. Disconnect the E2 park/neutral position switch assembly connector.

    2. Disconnect the F65 certification ECU (smart key ECU assembly) connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Switch Condition Specified Condition
      E2-2 - F65-5 (STAR) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Switch Condition Specified Condition
      E2-2 or F65-5 (STAR) - Body ground Always 10 kΩ or higher

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

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