Inspection Procedure 37: Fuel Pump System




OPERATION



FUNCTION



PROBABLE CAUSES



DIAGNOSIS PROCEDURE

STEP 1. Connector check: B-217 fuel pump relay (1) connector and B-203 fuel pump relay (2) connector

Q. Is the check result normal?

Go to Step 2 .

Repair or replace the connector.

STEP 2. Check fuel pump relay.

  • Fuel pump relay, continuity check (Refer to ).

Q. Is the check result normal?
Go to Step 3 .
Replace the fuel pump relay.

STEP 3. Perform resistance measurement at B-217 fuel pump relay (1) connector.


  • Remove relay, and measure at J/B side.
  • Resistance between terminal No. 2 and earth.
OK: Continuity (2 Ω or less)

Q. Is the check result normal?

Go to Step 4 .


    Check intermediate connector B-230, and repair if necessary. If intermediate connector is normal, check and repair harness between B-217 (terminal No. 2) fuel pump relay (1) connector and body earth.

    • Check earthing line for open circuit and damage.

STEP 4. Perform voltage measurement at B-217 fuel pump relay (1) connector.


  • Remove relay, and measure at J/B side.
  • Ignition switch: ON
  • Voltage between terminal No. 1 and earth.
OK: System voltage

Q. Is the check result normal?

Go to Step 6 .

Go to Step 5 .

STEP 5. Connector check: B-240 ignition switch connector


Q. Is the check result normal?


    Check intermediate connector B-229, and repair if necessary. If intermediate connector is normal, check and repair harness between B-217 (terminal No. 1) fuel pump relay (1) connector and B-240 (terminal No. 2) ignition switch connector.

    • Check power supply line for open/short circuit and damage.

Repair or replace the connector.

STEP 6. Perform voltage measurement at B-217 fuel pump relay (1) connector.


  • Remove relay, and measure at J/B side.
  • Voltage between terminal No. 3 and earth.
OK: System voltage

Q. Is the check result normal?

Go to Step 7 .


    Check intermediate connector B-208, and repair if necessary. If intermediate connector is normal, check and repair harness between B-217 (terminal No. 3) fuel pump relay (1) connector and battery.

    • Check power supply line for open/short circuit.

STEP 7. Perform voltage measurement at B-203 fuel pump relay (2) connector.


  • Remove relay, and measure at J/B side.
  • Ignition switch: ON
  • Voltage between terminal No. 1 and earth.
OK: System voltage

Q. Is the check result normal?

Go to Step 9 .

Go to Step 8 .

STEP 8. Connector check: B-240 ignition switch connector


Q. Is the check result normal?


    Check intermediate connector B-229, and repair if necessary. If intermediate connector is normal, check and repair harness between B-240 (terminal No. 2) ignition switch connector and B-203 (terminal No. 1) fuel pump relay (2) connector.

    • Check power supply line for open circuit.

Repair or replace the connector.

STEP 9. Connector check: A-09 engine-ECU connector or engine-A-M/T-ECU connector.

Q. Is the check result normal?

Go to Step 10 .

Repair or replace the connector.

STEP 10. Perform voltage measurement at A-09 engine-ECU connector or engine-A-M/T-ECU connector.



  • Disconnect connector, and measure at harness side.
  • Ignition switch: ON
  • Voltage between terminal No. 81 and earth.
OK: System voltage

Q. Is the check result normal?

Go to Step 11 .


    Check intermediate connector B-210, and repair if necessary. If intermediate connector is normal, check and repair harness between B-203 (terminal No. 2) fuel pump relay (2) connector and A-09 (terminal No. 81) engine-ECU connector or engine-A-M/T-ECU connector.

    • Check earthing line for open/short circuit.

STEP 11. Connector check: C-13 fuel pump connector

Q. Is the check result normal?

Go to Step 12 .

Repair or replace the connector.

STEP 12. Perform voltage measurement at C-13 fuel pump connector.


  • Disconnect connector, and measure at harness side.
  • Ignition switch: ON
  • Using a jumper wire, connect A-09 (terminal No. 81) engine-ECU connector or engine-A-M/T-ECU connector and earth.
  • Voltage between terminal No. 2 and earth.
OK: System voltage

Q. Is the check result normal?

Go to Step 15 .

Go to Step 13 .

STEP 13. Check harness between B-217 (terminal No. 4) fuel pump relay (1) connector and B-203 (terminal No. 3) fuel pump relay (2) connector.


  • Check power supply line for open/short circuit.

Q. Is the check result normal?

Go to Step 14

Repair the damaged harness wire.

STEP 14. Check harness between B-203 (terminal No. 4) fuel pump relay (2) connector and C-13 (terminal No. 2) fuel pump connector.


note Before checking harness, check intermediate connector B-228, and repair if necessary.

  • Check power supply line for open/short circuit and damage.

Q. Is the check result normal?

Replace the engine-ECU or engine-A-M/T-ECU then perform the variant coding (Refer to GROUP 00 - Precautions Before Service - How to Perform Variant Coding ).

Repair the damaged harness wire.

STEP 15. Perform resistance measurement at C-13 fuel pump connector.


  • Disconnect connector, and measure at harness side.
  • Resistance between terminal No. 3 and earth.
OK: Continuity (2 Ω or less)

Q. Is the check result normal?

Go to Step 16 .


    Check and repair harness between C-13 (terminal No. 3) fuel pump connector and body earth.

    • Check earthing line for open circuit and damage.

STEP 16. Connector check: B-240 ignition switch connector

Q. Is the check result normal?

Go to Step 17 .

Repair or replace the connector.

STEP 17. Check harness between B-240 (terminal No. 2) ignition switch connector and B-217 (terminal No. 1) fuel pump relay (1) connector.


note Before checking harness, check intermediate connector B-229, and repair if necessary.

  • Check power supply line for damage.

Q. Is the check result normal?

Go to Step 18 .

Repair the damaged harness wire.

STEP 18. Check harness between battery and B-217 (terminal No. 3) fuel pump relay (1) connector.

note Before checking harness, check intermediate connector B-208, and repair if necessary.

  • Check power supply line for damage.

Q. Is the check result normal?

Go to Step 19 .

Repair the damaged harness wire.

STEP 19. Check harness between B-217 (terminal No. 4) fuel pump relay (1) connector and B-203 (terminal No. 3) fuel pump relay (2) connector.


  • Check power supply line for damage.

Q. Is the check result normal?

Go to Step 20 .

Repair the damaged harness wire.

STEP 20. Check harness between B-240 (terminal No. 2) ignition switch connector and B-203 (terminal No. 1) fuel pump relay (2) connector.


note Before checking harness, check intermediate connector B-229, and repair if necessary.

  • Check power supply line for damage.

Q. Is the check result normal?

Go to Step 21 .

Repair.

STEP 21. Check harness between B-203 (terminal No. 4) fuel pump relay (2) connector and C-13 (terminal No. 2) fuel pump connector.


note Before checking harness, check intermediate connector B-228, and repair if necessary.

  • Check power supply line for damage.

Q. Is the check result normal?

Go to Step 22 .

Repair the damaged harness wire.

STEP 22. Check harness between B-203 (terminal No. 2) fuel pump relay (2) connector and A-09 (terminal No. 81) engine-ECU connector or engine-A-M/T-ECU connector.


note Before checking harness, check intermediate connector B-210, and repair if necessary.

  • Check earthing line for damage.

Q. Is the check result normal?

Replace the fuel pump.

Repair the damaged harness wire.