СИСТЕМА SFI Starter Signal Circuit

DESCRIPTION

While the engine is being cranked, current flows from terminal ST2 of the ignition switch assembly*1 or terminal STAR of the certification ECU (smart key ECU assembly)*2 to the park/neutral position switch assembly 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 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 the DLC3.

   2. Turn the ignition switch to ON.

   3. Turn the GTS on.

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

      
      Powertrain > Engine and ECT > 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
      Switch Position Starter Signal ON OFF START ON

      Result
      Result Proceed to NG (for CVT models) A NG (for Manual Transaxle Models) B OK C

   
   

   B

   INSPECT CLUTCH START SWITCH ASSEMBLY Click here

   C

   GO TO STOP AND START SYSTEM (STARTER SIGNAL CIRCUIT) Click here

   A

3. CHECK HARNESS AND CONNECTOR (ECM - ENGINE STOP AND START ECU - ST NO. 2 RELAY)

   
   

   1. Disconnect the ECM connector.

   2. Disconnect the engine stop and start ECM connector.

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition A62-29 (STA) - A66-23 (STA2) Always Below 1 Ω A62-29 (STA), A66-23 (STA2) or 2 (ST NO. 2 relay) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

4. CHECK HARNESS AND CONNECTOR (ECM - ENGINE STOP AND START ECU - PARK/NEUTRAL POSITION SWITCH ASSEMBLY)

   
   

   1. Disconnect the ECM connector.

   2. Disconnect the engine stop and start ECM connector.

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

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition A62-23 (NSW) - A66-17 (CLL) Always Below 1 Ω A62-23 (NSW), A66-17 (CLL) or B36-4 (B) - Body ground and other terminals Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   OK

   GO TO STOP AND START SYSTEM (STARTER SIGNAL CIRCUIT) Click here

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

5. INSPECT CLUTCH START SWITCH ASSEMBLY

   
   

   1. Inspect the clutch start switch assembly.

      Click here

      Result
      Result Proceed to OK (w/ Entry and Start System) A OK (w/o Entry and Start System) B NG C

   
   

   B

   INSPECT IGNITION SWITCH ASSEMBLY Click here

   C

   REPLACE CLUTCH START SWITCH ASSEMBLY Click here

   A

6. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - CLUTCH START SWITCH ASSEMBLY - ENGINE STOP AND START ECM)

   
   

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

   2. Disconnect the clutch start switch assembly 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 G82-5 (STAR) - A4-2 Always Below 1 Ω G82-5 (STAR) - A66-17 (CLL) Always Below 1 Ω A66-17 (CLL) - A4-2 Always Below 1 Ω G82-5 (STAR) or A4-2 - Body ground Always 10 kΩ or higher G82-5 (STAR) or A66-17 (CLL) - Body ground Always 10 kΩ or higher A66-17 (CLL) or A4-2 - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

7. CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH ASSEMBLY - ST NO.1 RELAY - ECM - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ENGINE STOP AND START)

   
   

   1. Disconnect the clutch start switch assembly connector.

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

   3. Disconnect the ECM connector.

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

   5. Disconnect the engine stop and start ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition A4-1 - A62-29 (STA) Always Below 1 Ω A4-1, 2 (ST NO.1 relay), A62-29 (STA), G82-7 (STA) or A66-21 (STA) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   OK

   GO TO STOP AND START SYSTEM (STARTER SIGNAL CIRCUIT) Click here

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

8. INSPECT IGNITION SWITCH ASSEMBLY

   
   

   1. Inspect the ignition switch assembly.

      Click here

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE IGNITION SWITCH ASSEMBLY Click here

   OK

9. CHECK HARNESS AND CONNECTOR (IGNITION SWITCH ASSEMBLY - CLUTCH START SWITCH ASSEMBLY - ENGINE STOP AND START ECM)

   
   

   1. Disconnect the ignition switch assembly connector.

   2. Disconnect the clutch start switch assembly 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 G4-2 (ST2) - A4-2 Always Below 1 Ω G4-2 (ST2) - A66-17 (CLL) Always Below 1 Ω A66-17 (CLL) - A4-2 Always Below 1 Ω G4-2 (ST2) or A4-2 - Body ground Always 10 kΩ or higher G4-2 (ST2) or A66-17 (CLL) - Body ground Always 10 kΩ or higher A66-2 (ST2) or A4-2 - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

10. CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH ASSEMBLY - ST NO.1 RELAY - ECM - ENGINE STOP AND START ECM)

    
    

    1. Disconnect the clutch start switch assembly connector.

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

    3. Disconnect the ECM connector.

    4. Disconnect the engine stop and start ECM connector.

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

       Standard Resistance
       Tester Connection Condition Specified Condition A4-1 - A62-29 (STA) Always Below 1 Ω A4-1, 2 (ST NO.1 relay), A62-29 (STA) or A66-21 (STA) - Body ground Always 10 kΩ or higher

       Result
       Proceed to OK NG

    
    

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

11. READ VALUE USING GTS (STARTER SIGNAL)

    
    

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

       
       Powertrain > Engine and ECT > 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
       Switch Position Starter Signal ON OFF START ON

       Result
       Result Proceed to OK A NG (w/ Stop and Start system) B NG (w/o Stop and Start system) C

    
    

    A

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

    B

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

    C

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