ECD SYSTEM(for CCo) Starter Signal Circuit

DESCRIPTION

While the engine is being cranked, current flows from terminal ST2 of the ignition or starter switch assembly*1 or terminal STAR of the certification ECU (smart key ECU assembly)*2 to the clutch start 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

CAUTION / NOTICE / HINT

PROCEDURE

1. CHECK WHETHER ENGINE CAN BE CRANKED

   
   

   1. Check if the engine can be cranked.

      Result
      Proceed to Engine cannot be cranked Engine can be cranked

   
   

   Engine can be cranked

   READ VALUE USING GTS (STARTER SIGNAL) Click here

   Engine cannot be cranked

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
      Switch Position Starter Signal ON OFF START ON

      Result
      Proceed to OK NG (for manual transaxle) NG (for automatic transaxle)

   
   

   NG (for manual transaxle)

   INSPECT CLUTCH START SWITCH ASSEMBLY Click here

   NG (for automatic transaxle)

   INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

   OK

3. INSPECT ST RELAY

   
   

   1. Inspect the ST relay.

      Click here

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE ST 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 RELAY - STARTER ASSEMBLY)

   
   

   1. Remove the ST relay from the engine room relay block and junction block assembly.

   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 3 (ST relay) - B6-1 Always Below 1 Ω 3 (ST relay) or B6-1 - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

6. CHECK TERMINAL VOLTAGE (POWER SOURCE OF STARTER ASSEMBLY)

   
   

   1. Disconnect the starter assembly connector.

   2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition C4-1 - Body ground Always 11 to 14 V

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

7. CHECK TERMINAL VOLTAGE (POWER SOURCE OF ST RELAY)

   
   
   1. 

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

      Remove the ST relay from the engine room NO. 2 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 5 (ST relay) - Body ground Always 11 to 14 V

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - ST RELAY)

   OK

8. CHECK HARNESS AND CONNECTOR (ST RELAY - BODY GROUND)

   
   

   1. Remove the ST relay from the engine room NO. 2 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 1 (ST relay) - Body ground Always Below 1 Ω

      Result
      Proceed to OK (for manual transaxle) OK (for automatic transaxle) NG

   
   

   OK (for automatic transaxle)

   CHECK HARNESS AND CONNECTOR (ST RELAY - PARK/NEUTRAL POSITION SWITCH ASSEMBLY) Click here

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK (for manual transaxle)

9. CHECK HARNESS AND CONNECTOR (ST RELAY - CLUTCH START SWITCH ASSEMBLY)

   
   

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

   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 2 (ST relay) - A4-1*1 Always Below 1 Ω 2 (ST relay) - F2-1*2 Always Below 1 Ω 2 (ST relay) or A4-1*1 - Body ground Always 10 kΩ or higher 2 (ST relay) or F2-1*2 - Body ground Always 10 kΩ or higher

      
      

      • *1: LHD

      • *2: RHD

      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

10. CHECK HARNESS AND CONNECTOR (ST RELAY - PARK/NEUTRAL POSITION SWITCH ASSEMBLY)

    
    

    1. Remove the ST relay from the engine room NO. 2 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 2 (ST relay) - B36-9 (L) Always Below 1 Ω 2 (ST relay) or B36-9 (L) - Body ground Always 10 kΩ or higher

       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

11. INSPECT CLUTCH START SWITCH ASSEMBLY

    
    

    1. Inspect the clutch start switch assembly.

       Click here

       Result
       Proceed to OK (w/ entry and start system) OK (w/o entry and start system) NG

    
    

    OK (w/o entry and start system)

    INSPECT IGNITION OR STARTER SWITCH ASSEMBLY Click here

    NG

    REPLACE CLUTCH START SWITCH ASSEMBLY Click here

    OK (w/ entry and start system)

12. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - CLUTCH START SWITCH ASSEMBLY)

    
    

    1. Disconnect the certification ECU (smart key ECU 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 G82-5 (STAR) - A4-2*1 Always Below 1 Ω G82-5 (STAR) - F2-2*2 Always Below 1 Ω G82-5 (STAR) or A4-2*1 - Body ground Always 10 kΩ or higher G82-5 (STAR) or F2-2*2 - Body ground Always 10 kΩ or higher

       
       

       • *1: LHD

       • *2: RHD

       Result
       Proceed to OK NG

    
    

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

13. CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH ASSEMBLY - ECM)

    
    

    1. Disconnect the clutch start switch assembly connector.

    2. Remove the ST relay from the engine room relay block and junction block assembly.

    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 A4-1*1 - A61-43 (STA) Always Below 1 Ω F2-1*2 - A61-43 (STA) Always Below 1 Ω A4-1*1 or A61-43 (STA) - Body ground Always 10 kΩ or higher F2-1*2 or A61-43 (STA) - Body ground Always 10 kΩ or higher

       
       

       • *1: LHD

       • *2: RHD

       Result
       Proceed to OK NG

    
    

    OK

    GO TO ENTRY AND START SYSTEM

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

14. INSPECT IGNITION OR STARTER SWITCH ASSEMBLY

    
    

    1. Inspect the ignition or starter switch assembly.

       Click here

       Result
       Proceed to OK NG

    
    

    NG

    REPLACE IGNITION OR STARTER SWITCH ASSEMBLY Click here

    OK

15. CHECK HARNESS AND CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY - CLUTCH START SWITCH ASSEMBLY)

    
    

    1. Disconnect the ignition or starter 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 G4-2 (ST2) - A4-2*1 Always Below 1 Ω G4-2 (ST2) - F2-2*2 Always Below 1 Ω G4-2 (ST2) or A4-2*1 - Body ground Always 10 kΩ or higher G4-2 (ST2) or F2-2*2 - Body ground Always 10 kΩ or higher

       
       

       • *1: LHD

       • *2: RHD

       Result
       Proceed to OK NG

    
    

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

16. CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH ASSEMBLY - ECM)

    
    

    1. Disconnect the clutch start switch assembly connector.

    2. Remove the ST relay from the engine room NO. 2 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 A4-1*1 - A61-43 (STA) Always Below 1 Ω F2-1*2 - A61-43 (STA) Always Below 1 Ω A4-1*1 or A61-43 (STA) - Body ground Always 10 kΩ or higher F2-1*2 or A61-43 (STA) - Body ground Always 10 kΩ or higher

       
       

       • *1: LHD

       • *2: RHD

       Result
       Proceed to OK NG

    
    

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

17. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY

    
    

    1. Inspect the park/neutral position switch assembly.

       Click here

       Result
       Proceed to OK (w/ entry and start system) OK (w/o entry and start system) NG

    
    

    OK (w/o entry and start system)

    INSPECT IGNITION OR STARTER SWITCH ASSEMBLY Click here

    NG

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

    OK (w/ entry and start system)

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

    
    

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

    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 G82-5 (STAR) - B36-4 (B) Always Below 1 Ω G82-5 (STAR) or B36-4 (B) - Body ground Always 10 kΩ or higher

       Result
       Proceed to OK NG

    
    

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    
    

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

    2. Remove the ST relay from the engine room relay block and junction block assembly.

    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 B36-9 (L) - A61-43 (STA) Always Below 1 Ω B36-9 (L) or A61-43 (STA) - Body ground Always 10 kΩ or higher

       Result
       Proceed to OK NG

    
    

    OK

    GO TO ENTRY AND START SYSTEM

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

20. INSPECT IGNITION OR STARTER SWITCH ASSEMBLY

    
    

    1. Inspect the ignition or starter switch assembly.

       Click here

       Result
       Proceed to OK NG

    
    

    NG

    REPLACE IGNITION OR STARTER SWITCH ASSEMBLY Click here

    OK

21. CHECK HARNESS AND CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY - PARK/NEUTRAL POSITION SWITCH ASSEMBLY)

    
    

    1. Disconnect the ignition or starter switch assembly connector.

    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 G4-2 (ST2) - B36-4 (B) Always Below 1 Ω G4-2 (ST2) or B36-4 (B) - Body ground Always 10 kΩ or higher

       Result
       Proceed to OK NG

    
    

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    
    

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

    2. Remove the ST relay from the engine room NO. 2 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 B36-9 (L) - A61-43 (STA) Always Below 1 Ω B36-9 (L) or A61-43 (STA) - Body ground Always 10 kΩ or higher

       Result
       Proceed to OK NG

    
    

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

23. 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
       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

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ST RELAY - ECM)