MULTI-MODE MANUAL TRANSAXLE SYSTEM 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.

Engine starting control (w/o Entry and Start System)

1. 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.

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

3. 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 here

CAUTION / NOTICE / HINT

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 Display	Measurement Item	Range	Normal Condition	Diagnostic Note
      STA Switch Signal	STA signal	OFF or ON	ON: 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

   NG

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

   
   
   1. 

      *1	Engine Room Relay Block and Junction Block Assembly
      *2	ST NO. 1 Relay (Starter Relay)

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

   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

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

   C

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

   A

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

   
   

   1. Inspect the ST NO. 1 relay.

      Click here

      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. 

      *a	Front view of wire harness connector (to TCM)

      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

      Result
      Proceed to OK NG

   
   

   NG

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

   OK

7. REPLACE TCM

   
   

   1. Replace the TCM.

      Click here

      Result
      Proceed to NEXT

   
   

   NEXT

8. PERFORM INITIALIZATION

   
   

   1. Perform the initialization and learning procedure.

      Click here

      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 (TME) Always Below 1 Ω A108-3 (TMN) or c1-1 (TME) - 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 here

       Result
       Proceed to OK NG

    
    

    NG

    REPLACE NEUTRAL POSITION SWITCH Click here

    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 here

       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 here

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 (TME) Always Below 1 Ω ST NO. 1 relay terminal 2 or c1-1 (TME) - 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 here

       Result
       Proceed to OK NG

    
    

    NG

    REPLACE NEUTRAL POSITION SWITCH Click here

    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