SFI SYSTEM Fuel Pump Control Circuit

DESCRIPTION

Refer to DTC P0230 (Click here).

WIRING DIAGRAM

Refer to DTC P0230 (Click here).

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   CHECK FUEL PUMP OPERATION

   
   

   1. Check the fuel pump operation (Click here).

   
   
   • OKClick here
   • NGClick here
2. Click here

   INSPECT TERMINAL VOLTAGE (FUEL PMP RELAY TERMINAL)

   
   
   1. 

      Remove the FUEL PMP relay from the engine room relay block.

   2. Turn the ignition switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition FUEL PMP relay terminal 2 - Body ground Ignition switch on (IG) 11 to 14 V FUEL PMP relay terminal 3 - Body ground Ignition switch on (IG) 11 to 14 V

      Table 1. Text in Illustration

      *a	Engine Room Relay Block

   4. Reinstall the FUEL PMP relay.

   
   
   • OKClick here
   • NGClick here
3. Click here

   INSPECT FUEL PUMP RELAY

   
   
   1. 

      Remove the FUEL PMP relay from the engine room relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition 3 - 4 No battery voltage applied across terminals 1 and 2 Below 1 Ω 3 - 4 Battery voltage applied across terminals 1 and 2 10 kΩ or higher 3 - 5 No battery voltage applied across terminals 1 and 2 10 kΩ or higher 3 - 5 Battery voltage applied across terminals 1 and 2 Below 1 Ω

   3. Reinstall the FUEL PMP relay.

   
   
   • OKClick here
   • NGClick here
4. Click here

   INSPECT FUEL PUMP RESISTOR

   
   

   1. Inspect the fuel pump resistor (Click here).

   
   
   • OKClick here
   • NGClick here
5. Click here

   CHECK HARNESS AND CONNECTOR (FUEL PMP RELAY - FUEL PUMP RESISTOR)

   
   

   1. Remove the FUEL PMP relay from the engine room relay block.

   2. Disconnect the fuel pump resistor connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition FUEL PMP relay terminal 5 - A35-1 Always Below 1 Ω FUEL PMP relay terminal 4 - A35-2 Always Below 1 Ω

      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition FUEL PMP relay terminal 5 or A35-1 - Body ground Always 10 kΩ or higher FUEL PMP relay terminal 4 or A35-2 - Body ground Always 10 kΩ or higher

   4. Reinstall the FUEL PMP relay.

   5. Reconnect the fuel pump resistor connector.

   
   
   • OKClick here
   • NGClick here
6. Click here

   CHECK HARNESS AND CONNECTOR (FUEL PUMP - FUEL PMP RELAY)

   
   

   1. Remove the FUEL PMP relay from the engine room relay block.

   2. Disconnect the fuel pump connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition FUEL PMP relay terminal 4 - O9-4 Always Below 1 Ω

      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition FUEL PMP relay terminal 4 or O9-4 - Body ground Always 10 kΩ or higher

   4. Reconnect the fuel pump connector.

   5. Reinstall the FUEL PMP relay.

   
   
   • OKClick here
   • NGClick here
7. Click here

   CHECK HARNESS AND CONNECTOR (FUEL PMP RELAY - ECM)

   
   

   1. Remove the FUEL PMP relay from the engine room relay block.

   2. Disconnect ECM connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition FUEL PMP relay terminal 1 - D55-8 (FPR) Always Below 1 Ω

      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition FUEL PMP relay terminal 1 or D55-8 (FPR) - Body ground Always 10 kΩ or higher

   4. Reconnect the ECM connector.

   5. Reinstall the FUEL PMP relay.

   
   
   • OKClick here
   • NGClick here
8. Click here

   INSPECT FUEL PUMP

   
   

   1. Inspect the fuel pump (Click here).

   
   
   • OKClick here
   • NGClick here
9. Click here

   CHECK HARNESS AND CONNECTOR (FUEL PUMP - FUEL PMP RELAY)

   
   

   1. Disconnect the fuel pump connector.

   2. Remove the FUEL PMP relay from the engine room relay block.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition O9-4 - FUEL PMP relay terminal 4 Always Below 1 Ω

      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition O9-4 or FUEL PMP relay terminal 4 - Body ground Always 10 kΩ or higher

   4. Reinstall the FUEL PMP relay.

   5. Reconnect the fuel pump connector.

   
   
   • OKClick here
   • NGClick here
10. Click here

    INSPECT ENGINE ROOM RELAY BLOCK (C/OPN RELAY - FUEL PMP RELAY)

    
    

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

    2. Disconnect the engine room junction block assembly connector.

    3. Remove the FUEL PMP relay from the engine room relay block.

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

       Standard Resistance (Check for Open)
       Tester Connection Condition Specified Condition 2E-13 - FUEL PMP relay terminal 2 Always Below 1 Ω 2E-13 - FUEL PMP relay terminal 3 Always Below 1 Ω

       Standard Resistance (Check for Short)
       Tester Connection Condition Specified Condition 2E-13 or FUEL PMP relay terminal 2 - Body ground Always 10 kΩ or higher 2E-13 or FUEL PMP relay terminal 3- Body ground Always 10 kΩ or higher

    5. Reconnect the engine room junction block assembly connector.

    6. Reinstall the engine room junction block assembly.

    7. Reinstall the FUEL PMP relay.

    
    
    • OKClick here
    • NGClick here
11. Click here

    CHECK HARNESS AND CONNECTOR (FUEL PUMP - BODY GROUND)

    
    

    1. Disconnect the fuel pump connector.

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

       Standard Resistance (Check for Open)
       Tester Connection Condition Specified Condition O9-5 - Body ground Always Below 1 Ω

    3. Reconnect the fuel pump connector.

    
    
    • OKClick here
    • NGClick here
12. Click here

    INSPECT ENGINE ROOM JUNCTION BLOCK ASSEMBLY

    
    

    1. Inspect the engine room junction block assembly (Click here).

    
    
    • OKClick here
    • NGClick here
13. Click here

    CHECK HARNESS AND CONNECTOR (C/OPN RELAY - IG2 RELAY)

    
    

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

    2. Disconnect the engine room junction block assembly connector.

    3. Remove the IG2 relay from the engine room relay block.

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

       Standard Resistance (Check for Open)
       Tester Connection Condition Specified Condition 2E-8 - IG2 relay terminal 3 Always Below 1 Ω

       Standard Resistance (Check for Open)
       Tester Connection Condition Specified Condition 2E-8 or IG2 relay terminal 3 - Body ground Always 10 kΩ or higher

    5. Reconnect the engine room junction block assembly connector.

    6. Reinstall the engine room junction block assembly.

    
    
    • OKClick here
    • NGClick here
14. Click here

    CHECK HARNESS AND CONNECTOR (C/OPN RELAY - ECM)

    
    

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

    2. Disconnect the engine room junction block assembly connector.

    3. Disconnect the ECM connector.

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

       Standard Resistance (Check for Open)
       Tester Connection Condition Specified Condition 2D-12 - D56-3 (FC) Always Below 1 Ω

       Standard Resistance (Check for Short)
       Tester Connection Condition Specified Condition 2D-12 or D56-3 (FC) - Body ground Always 10 kΩ or higher

    5. Reconnect the ECM connector.

    6. Reconnect the engine room junction block assembly connector.

    7. Reinstall the engine room junction block assembly.

    
    
    • OKClick here
    • NGClick here
15. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL PMP RELAY - C/OPN RELAY)

16. Click here

    REPLACE FUEL PUMP RELAY

17. Click here

    REPLACE FUEL PUMP RESISTORClick here

18. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL PMP RELAY - FUEL PUMP RESISTOR)

19. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL PUMP - FUEL PMP RELAY)

20. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL PMP RELAY - ECM)

21. Click here

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLEClick here

22. Click here

    REPLACE FUEL PUMPClick here

23. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL PUMP - FUEL PMP RELAY)

24. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (C/OPN RELAY - FUEL PMP RELAY)

25. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL PUMP - BODY GROUND)

26. Click here

    REPLACE ENGINE ROOM JUNCTION BLOCK ASSEMBLYClick here

27. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (C/OPN RELAY - IG2 RELAY)

28. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (C/OPN RELAY - ECM)

29. Click here

    REPLACE ECMClick here