SFI SYSTEM Starter Signal Circuit

DESCRIPTION

While the engine is being cranked, current flows from terminal ST1 of the ignition switch assembly*1 or terminal STAR of the certification ECU (smart key ECU assembly)*2 to the park/neutral position switch and to terminal STA of the ECM (STA signal).

• *1: w/o Entry and Start System

• *2: w/ Entry and Start System

WIRING DIAGRAM

Refer to DTC P0617.

Click here

CAUTION / NOTICE / HINT

PROCEDURE

1. CHECK IF VEHICLE IS EQUIPPED WITH ENTRY AND START SYSTEM

   
   

   1. Confirm the vehicle specifications.

      Result
      Result Proceed to w/o Entry and Start System A w/ Entry and Start System 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 ignition switch to ON.

   3. Turn the GTS on.

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

      
      Powertrain > Engine > Data List

      Tester Display
      Starter Signal

   5. Check the value displayed on the GTS when the ignition switch is turned to the ON and START positions.

      OK
      Ignition Switch Position Starter Signal ON OFF START ON

      Result
      Proceed to OK NG

   
   

   OK

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

   NG

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

   
   
   1. 

      *1	Engine Room Relay Block Assembly
      *2	ST NO. 1 Relay

      Remove the ST NO. 1 relay from the engine room relay 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 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 Models) B NG (for Automatic Transmission Models) C

   
   

   B

   CHECK HARNESS AND CONNECTOR (ST NO. 1 RELAY - CLUTCH START SWITCH ASSEMBLY, ECM) Click here

   C

   CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY - ST NO. 1 RELAY, ECM) Click here

   A

4. 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

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

   
   

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

   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 1 - Body ground Always Below 1 Ω

      Result
      Result Proceed to OK (for Manual Transmission Models) A OK (for Automatic Transmission Models) B NG C

   
   

   A

   REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - CLUTCH PEDAL SWITCH)

   B

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

   C

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

6. CHECK HARNESS AND CONNECTOR (ST NO. 1 RELAY - CLUTCH START SWITCH ASSEMBLY, ECM)

   
   

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

   2. Disconnect the clutch start switch assembly connector.

   3. Disconnect the ECM connector.

   4. 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 - B2-1 Always Below 1 Ω ST NO. 1 relay terminal 2 - C53-17 (STA) Always Below 1 Ω ST NO. 1 relay terminal 2, B2-1 or C53-17 (STA) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

7. INSPECT CLUTCH START SWITCH ASSEMBLY

   
   

   1. Inspect the clutch start switch assembly.

      Click here

      Result
      Result OK NG

   
   

   NG

   REPLACE CLUTCH START SWITCH ASSEMBLY Click here

   OK

8. CHECK HARNESS AND CONNECTOR (IGNITION SWITCH ASSEMBLY - CLUTCH START SWITCH ASSEMBLY)

   
   

   1. Disconnect the ignition switch assembly connector.

   2. Disconnect the clutch start switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition G1-2 (ST2) - B2-2 Always Below 1 Ω G1-2 (ST2) - C53-15(NSW) Always Below 1 Ω G1-2 (ST2), C53-15(NSW) or B2-2 - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

9. INSPECT IGNITION SWITCH ASSEMBLY

   
   

   1. Inspect the ignition switch assembly.

      Click here

      Result
      Proceed to OK NG

   
   

   OK

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

   NG

   REPLACE IGNITION SWITCH ASSEMBLY Click here

10. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY - ST NO. 1 RELAY, ECM)

    
    

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

    2. Disconnect the park/neutral position switch assembly connector.

    3. Disconnect the ECM connector.

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

       Standard Resistance
       Tester Connection Condition Specified Condition C24-5 (L) - ST NO. 1 relay terminal 2 Always Below 1 Ω C53-17 (STA) - ST NO. 1 relay terminal 2 Always Below 1 Ω C24-5 (L), C53-17 (STA) or ST NO. 1 relay terminal 2 - Body ground Always 10 kΩ or higher

       Result
       Proceed to OK NG

    
    

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

11. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY

    
    

    1. Inspect the park/neutral position switch assembly.

       
       

       • for AC60E

         Click here

       • for AC60F

         Click here

       Result
       Result OK NG

    
    

    NG

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY for AC60E Click here for AC60F Click here

    OK

12. CHECK HARNESS AND CONNECTOR (IGNITION SWITCH ASSEMBLY - PARK/NEUTRAL POSITION SWITCH ASSEMBLY - ECM)

    
    

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

    2. Disconnect the ignition switch assembly connector.

    3. Disconnect the ECM connector.

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

       Standard Resistance
       Tester Connection Condition Specified Condition G1-2 (ST2) - C24-4 (B) Always Below 1 Ω G1-2 (ST2) - C53-15 (NSW) Always Below 1 Ω G1-2 (ST2), C24-4 (B) or C53-15 (NSW) - Body ground Always 10 kΩ or higher

       Result
       Proceed to OK NG

    
    

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

13. INSPECT IGNITION SWITCH ASSEMBLY

    
    

    1. Inspect the ignition switch assembly.

       Click here

       Result
       Proceed to OK NG

    
    

    OK

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

    NG

    REPLACE IGNITION SWITCH ASSEMBLY Click here

14. READ VALUE USING GTS (STARTER SIGNAL)

    
    

    1. Connect the GTS to DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

       
       Powertrain > Engine > Data List

       Tester Display
       Starter Signal

    5. Check the value displayed on the GTS when the ignition switch is turned to the ON and START positions.

       OK
       Ignition Switch Position Starter Signal ON OFF START ON

       Result
       Result Proceed to OK A NG (for Automatic Transmission Models) B NG (for Manual Transmission Models) C

    
    

    A

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

    C

    INSPECT CLUTCH START SWITCH ASSEMBLY Click here

    B

15. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY

    
    

    1. Inspect the park/neutral position switch assembly.

       
       

       • for AC60E

         Click here

       • for AC60F

         Click here

       Result
       Result OK NG

    
    

    NG

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY for AC60E Click here for AC60F Click here

    OK

16. CHECK HARNESS AND CONNECTOR (ST NO. 1 RELAY - PARK/NEUTRAL POSITION SWITCH ASSEMBLY, ECM)

    
    

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

    2. Disconnect the park/neutral position switch 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 2 - C24-5(L) Always Below 1 Ω ST NO.1 relay terminal 2 - C53-17 (STA) Always Below 1 Ω ST NO. 1 relay terminal 2, C24-5 (L) or C53-17 (STA) - Body ground Always 10 kΩ or higher

       Result
       Proceed to OK NG

    
    

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    
    

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

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

    3. Disconnect the ECM connector.

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

       Standard Resistance
       Tester Connection Condition Specified Condition G70-16 (STAR) - C24-4 (B) Always Below 1 Ω G70-16 (STAR) - C53-15 (NSW) Always Below 1 Ω G70-16 (STAR) or C24-4 (B) or C53-15 (NSW) - Body ground Always 10 kΩ or higher

       Result
       Proceed to OK NG

    
    

    OK

    GO TO ENTRY AND START SYSTEM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

18. INSPECT CLUTCH START SWITCH ASSEMBLY

    
    

    1. Inspect the clutch start switch assembly.

       Click here

       Result
       Result OK NG

    
    

    NG

    REPLACE CLUTCH START SWITCH ASSEMBLY Click here

    OK

19. CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH ASSEMBLY, ST NO. 1 RELAY - ECM)

    
    

    1. Disconnect the clutch start switch assembly connector.

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

    3. Disconnect the ECM connector.

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

       Standard Resistance
       Tester Connection Condition Specified Condition B2-1 - C53-17 (STA) Always Below 1 Ω B2-1 - ST NO. 1 relay terminal 2 Always Below 1 Ω B2-1, ST NO.1 relay terminal 2 or C53-17 (STA) - Body ground Always 10 kΩ or higher

       Result
       Proceed to OK NG

    
    

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

20. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - CLUTCH START SWITCH ASSEMBLY, ECM)

    
    

    1. Disconnect the clutch start switch assembly connector.

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

    3. Disconnect the ECM connector.

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

       Standard Resistance
       Tester Connection Condition Specified Condition G70-16 (STAR) - B2-2 Always Below 1 Ω G70-16 (STAR) - C53-15 (NSW) Always Below 1 Ω G70-16 (STAR), B2-2 or C53-15(NSW) - Body ground Always 10 kΩ or higher

       Result
       Proceed to OK NG

    
    

    OK

    GO TO ENTRY AND START SYSTEM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR