СИСТЕМА SFI Starter Signal Circuit

DESCRIPTION

While the engine is being cranked, current flows from terminal STA2 of the engine stop and start ECU to terminal STA of the ECM (STA signal).

WIRING DIAGRAM

Refer to DTC P0617.

Click here

CAUTION / NOTICE / HINT

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 GTS (STARTER SIGNAL) Click here

   A

2. READ VALUE USING GTS (STARTER SIGNAL)

   
   

   1. Connect the GTS to DLC3.

   2. Turn the engine switch on (IG).

   3. Turn the GTS on.

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

      
      Powertrain > Engine > Data List

      Tester Display
      Starter Signal

   5. Check the result when the engine switch is on (IG) and the engine starts.

      OK
      Condition Starter Signal Engine switch on (IG) OFF Engine cranking position ON

      Result
      Proceed to OK NG

   
   

   NG

   CHECK STOP AND START SYSTEM Click here

   OK

3. INSPECT RELAY (ST NO. 2 RELAY)

   
   

   1. Inspect the ST NO. 2 relay.

      Click here

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE RELAY (ST NO. 2 RELAY)

   OK

4. INSPECT STARTER ASSEMBLY

   
   

   1. Inspect the starter assembly.

      Click here

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE STARTER ASSEMBLY Click here

   OK

5. CHECK HARNESS AND CONNECTOR (ST NO. 2 RELAY - STARTER ASSEMBLY)

   
   

   1. Remove the ST NO. 2 relay from the No. 1 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 ST NO. 2 relay terminal 3 - D7-1 (SL2) Always Below 1 Ω ST NO. 2 relay terminal 3 or D7-1 (SL2) - Body ground and other terminals Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

6. CHECK HARNESS AND CONNECTOR (ST NO. 2 RELAY - ECM)

   
   

   1. Remove the ST NO. 2 relay from the No. 1 engine room relay block.

   2. Disconnect the ECM connector.

   3. Disconnect the engine stop and start ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition A53-29 (STA) - ST NO. 2 relay terminal 1 Always Below 1 Ω A53-29 (STA) or ST NO. 2 relay terminal 1 - Body ground and other terminals Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

7. CHECK HARNESS AND CONNECTOR (ST NO. 2 RELAY - BODY GROUND)

   
   

   1. Remove the ST NO. 2 relay from the No. 1 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 NO. 2 relay terminal 2 - Body ground Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

8. CHECK HARNESS AND CONNECTOR (BATTERY - ST NO. 2 RELAY)

   
   

   1. Remove the ST NO. 2 relay from the No. 1 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 NO. 2 relay terminal 5 - Body ground Always 11 to 14 V

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

9. INSPECT RELAY (ST NO. 1 RELAY)

   
   

   1. Inspect the ST NO. 1 relay.

      Click here

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE RELAY (ST NO. 1 RELAY)

   OK

10. CHECK HARNESS AND CONNECTOR (ST NO. 1 RELAY - STARTER ASSEMBLY)

    
    

    1. Remove the ST NO. 1 relay from the No. 1 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 ST NO. 1 relay terminal 3 - D7-2 (SL1) Always Below 1 Ω ST NO. 1 relay terminal 3 or D7-2 (SL1) - Body ground and other terminals Always 10 kΩ or higher

       Result
       Proceed to OK NG

    
    

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    
    

    1. Remove the ST NO. 1 relay from the No. 1 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 NO. 1 relay terminal 2 - Body ground Always Below 1 Ω

       Result
       Proceed to OK NG

    
    

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - ST NO. 1 RELAY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

12. CHECK STOP AND START SYSTEM

    
    

    1. Check the stop and start system.

       Click here

       Result
       Proceed to OK NG

    
    

    OK

    CHECK SMART ENTRY AND START SYSTEM Click here

    NG

    REPAIR OR REPLACE STOP AND START SYSTEM Click here

13. READ VALUE USING GTS (STARTER SIGNAL)

    
    

    1. Connect the GTS to DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

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

       
       Powertrain > Engine > Data List

       Tester Display
       Starter Signal

    5. Check the result when the engine switch is on (IG) and the engine starts.

       OK
       Condition Starter Signal Engine switch on (IG) OFF Engine cranking position ON

       Result
       Proceed to OK NG

    
    

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ST NO. 2 RELAY - ECM)