SFI SYSTEM 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 and to terminal STA of the ECM (STA signal).

• *1: w/o Smart Entry and Start System

• *2: w/ Smart 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 > 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
      Condition Starter Signal Ignition switch ON OFF Engine cranking position ON

      Result
      Proceed to OK NG

   
   

   NG

   INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

   OK

3. 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)

   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. 1 RELAY - STARTER ASSEMBLY)

   
   

   1. Remove the ST NO. 1 relay from the 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 - C26-1 Always Below 1 Ω ST NO. 1 relay terminal 3 or C26-1 - 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 (BATTERY - STARTER ASSEMBLY)

   
   

   1. Disconnect the cable from the negative (-) battery terminal.

   2. Disconnect the cable from the positive (+) battery terminal.

   3. Disconnect the starter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Battery cable positive (+) terminal - D3-1 Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

7. 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 1 - Body ground Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

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

   
   

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

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition C22-5 (L) - ST NO. 1 relay terminal 2 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

9. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY

   
   

   1. Inspect the park/neutral position switch assembly.

      for 2WD:

      Click here

      for 4WD:

      Click here

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

   
   

   B

   CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - PARK/NEUTRAL POSITION SWITCH ASSEMBLY, ECM) Click here

   C

   REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY for 2WD: REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY for 4WD: REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

   A

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

    
    

    1. Disconnect the ignition switch assembly connector.

    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 G135-2 (ST2) - C22-4 (B) Always Below 1 Ω G135-2 (ST2) - C85-23 (NSW) Always Below 1 Ω G135-2 (ST2) or C22-4 (B) - Body ground and other terminals Always 10 kΩ or higher G135-2 (ST2) or C85-23 (NSW) - 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 - PARK/NEUTRAL POSITION SWITCH ASSEMBLY, ECM)

    
    

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

    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 ST NO. 1 relay terminal 2 - C22-5 (L) Always Below 1 Ω ST NO. 1 relay terminal 2 - G145-28 (STA) Always Below 1 Ω ST NO. 1 relay terminal 2 or C22-5 (L) - Body ground and other terminals Always 10 kΩ or higher ST NO. 1 relay terminal 2 or G145-28 (STA) - Body ground and other terminals Always 10 kΩ or higher

       Result
       Proceed to OK NG

    
    

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

12. 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

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

    
    

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

    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 G17-16 (STAR) - C22-4 (B) Always Below 1 Ω G17-16 (STAR) - C85-23 (NSW) Always Below 1 Ω G17-16 (STAR) or C22-4 (B) - Body ground and other terminals Always 10 kΩ or higher G17-16 (STAR) or C85-23 (NSW) - Body ground and other terminals Always 10 kΩ or higher

       Result
       Proceed to OK NG

    
    

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

14. CHECK HARNESS AND CONNECTOR (ECM - PARK/NEUTRAL POSITION SWITCH ASSEMBLY, ST NO. 1 RELAY, CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

    
    

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

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

    3. Disconnect the ECM 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 G145-28 (STA) - C22-5 (L) Always Below 1 Ω G145-28 (STA) - ST NO. 1 relay terminal 2 Always Below 1 Ω G145-28 (STA) - G17-37 (STA) Always Below 1 Ω G145-28 (STA) or C22-5 (L) - Body ground and other terminals Always 10 kΩ or higher G145-28 (STA) or ST NO. 1 relay terminal 2 - Body ground and other terminals Always 10 kΩ or higher G145-28 (STA) or G17-37 (STA) - Body ground and other terminals Always 10 kΩ or higher

       Result
       Proceed to OK NG

    
    

    OK

    GO TO SMART ENTRY AND START SYSTEM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

15. 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 > 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
       Condition Starter Signal ON OFF Engine cranking 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. 1 RELAY - ECM)