СИСТЕМА МЕХАНИЧЕСКОЙ ТРАНСМИССИИ "MULTIMODE" Starter Signal Circuit

DESCRIPTION

  • Engine starting control (w/ Entry and Start System)
  • In this vehicle, the ST NO. 1 relay that supplies power to the starter motor is operated by the cranking holding function of the certification ECU. When the appropriate vehicle conditions are satisfied, the brake pedal is depressed and the transaxle gear is in neutral, the engine can be cranked.

    If the brake pedal is not depressed or the transaxle gear is not in neutral, the engine cannot be cranked.

    During cranking, the ST NO. 1 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.

  1. Engine starting control (w/o Entry and Start System)
  2. When the ignition switch is turned to ON and the brake pedal is depressed, the TCM turns on the shift lock solenoid in order to release shift lock.

  3. When the shift lever is in N, the TCM detects that the shift lever is in N using the shift position sensor.

  4. When the engine is started, the start signal is sent to the TCM through the neutral position switch. When the TCM receives this signal, the ST NO. 1 (starter) relay is turned on to cause the engine start.

WIRING DIAGRAM

Refer to DTC P0617.

Click hereНажмите здесь

CAUTION / NOTICE / HINT

Tip:

If DTC P0703 is output, troubleshoot this code first.

Note:

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

PROCEDURE

  1. READ VALUE USING GTS (STA SWITCH SIGNAL)

    1. Connect an GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

    5. In accordance with the display on the GTS, read the Data List.

      Powertrain > Multi-Mode M/T > Data List
      Tester DisplayMeasurement ItemRangeNormal ConditionDiagnostic Note
      STA Switch SignalSTA signalOFF or ONON: Cranking-
      OK
      ON is displayed in the Data List when cranking.
      Powertrain > Multi-Mode M/T > Data List
      Tester Display
      STA Switch Signal
      Result
      Proceed to
      OK
      NG
    OK

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


    NG
  2. CHECK ST NO. 1 RELAY (POWER SOURCE)

    1. Remove the ST NO. 1 relay from the engine room relay block and junction block assembly.

      A012KUTC08
      *1 Engine Room Relay Block and Junction Block Assembly
      *2 ST NO. 1 Relay (Starter Relay)
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      ST NO.1 relay terminal 2 - Body ground 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 Нажмите здесь

    C Нажмите здесь

    A
  3. INSPECT ST NO. 1 RELAY (STARTER RELAY)

    1. Inspect the ST NO. 1 relay.

      Click hereНажмите здесь

      Result
      Proceed to
      OK
      NG
    NG

    REPLACE ST NO. 1 RELAY (STARTER RELAY)


    OK
  4. CHECK HARNESS AND CONNECTOR (ST NO. 1 RELAY - BODY GROUND)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      ST NO. 1 relay terminal 2 - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG
    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - TCM)


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR


  5. CHECK HARNESS AND CONNECTOR (ST NO. 1 RELAY - TCM)

    1. Disconnect the TCM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      ST NO. 1 relay terminal 2 - A108-4 (STRL) Always Below 1 Ω
      ST NO. 1 relay terminal 2 - A108-6 (STA) Always Below 1 Ω
      ST NO. 1 relay terminal 2 or A108-4 (STRL) - Body ground Always 10 kΩ or higher
      ST NO. 1 relay terminal 2 or A108-6 (STA) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR


    OK
  6. CHECK TCM (TMN VOLTAGE)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A108-3 (TMN) - Body ground Engine cranking 11 to 14 V
      A012MSIC04
      *a

      Front view of wire harness connector

      (to TCM)

      Result
      Proceed to
      OK
      NG
    NG Нажмите здесь

    OK
  7. REPLACE TCM

    1. Replace the TCM.

      for LHD: Click here Нажмите здесь

      for RHD: Click here Нажмите здесь

      Result
      Proceed to
      NEXT
    NEXT
  8. PERFORM INITIALIZATION

    1. Perform the initialization and learning procedure.

      Click hereНажмите здесь

      Result
      Proceed to
      NEXT
    NEXT

    END


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

    1. Disconnect the neutral position switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A108-3 (TMN) - c1-1 (THE) Always Below 1 Ω
      A108-3 (TMN) or c1-1 (THE) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR


    OK
  10. INSPECT NEUTRAL POSITION SWITCH

    1. Inspect the neutral position switch.

      Click hereНажмите здесь

      Result
      Proceed to
      OK
      NG
    NG

    REPLACE NEUTRAL POSITION SWITCH Click hereНажмите здесь


    OK
  11. CHECK HARNESS AND CONNECTOR (NEUTRAL POSITION SWITCH - IGNITION OR STARTER SWITCH ASSEMBLY)

    1. Disconnect the ignition or starter switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      c1-2 - E4-2 (ST2) Always Below 1 Ω
      c1-2 or E4-2 (ST2) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR


    OK
  12. INSPECT IGNITION OR STARTER SWITCH ASSEMBLY

    1. Inspect the ignition or starter switch assembly.

      Click hereНажмите здесь

      Result
      Proceed to
      OK
      NG
    OK

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


    NG

    REPLACE IGNITION OR STARTER SWITCH ASSEMBLY Click hereНажмите здесь


  13. CHECK HARNESS AND CONNECTOR (ST NO. 1 RELAY - NEUTRAL POSITION SWITCH)

    1. Disconnect the neutral position switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      ST NO. 1 relay terminal 2 - c1-1 (THE) Always Below 1 Ω
      ST NO. 1 relay terminal 2 or c1-1 (THE) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR


    OK
  14. INSPECT NEUTRAL POSITION SWITCH

    1. Inspect the neutral position switch.

      Click hereНажмите здесь

      Result
      Proceed to
      OK
      NG
    NG

    REPLACE NEUTRAL POSITION SWITCH Click hereНажмите здесь


    OK
  15. CHECK HARNESS AND CONNECTOR (NEUTRAL POSITION SWITCH - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

    1. Disconnect the certification ECU (smart key ECU assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      c1-2 (TMN) - E33-5 (STAR) Always Below 1 Ω
      c1-2 (TMN) or E33-5 (STAR) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG
    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR