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FUEL PUMP UNIT INSPECTION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))]

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Fuel Pump Operation Inspection

1. Connect the M-MDS to the DLC-2.

2. Perform the KOEO self-test. (See DTC INSPECTION.)

• If a DTC is detected, repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-G (E))].)

3. Remove the fuel-filler cap.

4. Switch the ignition ON (engine off).

5. Verify the following operation sounds for approx. 1 s after the ignition is switched ON (engine off).

• Fuel pump relay (OFF → ON → OFF) (See RELAY LOCATION [(E)].)

• Fuel pump (Verify direct operation sound from fuel-filler opening)

― If the operation sounds cannot be verified, inspect the following and repair or replace the malfunctioning location.

Fuel pump relay operation sound cannot be verified

• Fuel pump relay (stuck open/closed)

• Wiring harness between IG1 relay and fuel pump relay terminal E (short, open circuit)

• Wiring harness between fuel pump relay terminal A and PCM terminal 2AW (short, open circuit)

Fuel pump operation sound cannot be verified

• Fuel pump relay (stuck open or open circuit in internal circuit)

• Wiring harness between battery and fuel pump relay terminal D

• Wiring harness between fuel pump relay terminal C and fuel pump control module terminal 2B (short, open circuit)

• Fuel pump unit (inspect for continuity) (See Continuity Inspection.)

• Wiring harness between fuel pump unit terminal A and fuel pump control module terminal 2C (short, open circuit)

• Wiring harness between fuel pump unit terminal D and fuel pump control module terminal 2A (short, open circuit) (with fuel pump unit connector 4-pin type)

• Wiring harness between fuel pump unit terminal B and fuel pump control module terminal 2E (short, open circuit) (with fuel pump unit connector 4-pin type)

• Wiring harness between fuel pump unit terminal C and fuel pump control module terminal 2F (short, open circuit) (with fuel pump unit connector 4-pin type)

• Wiring harness between fuel pump unit terminal D and fuel pump control module terminal 2E (short, open circuit) (with fuel pump unit connector 6-pin type)

• Wiring harness between fuel pump unit terminal B and fuel pump control module terminal 2A (short, open circuit) (with fuel pump unit connector 6-pin type)

• Wiring harness between fuel pump unit terminal E and fuel pump control module terminal 2F (short, open circuit) (with fuel pump unit connector 6-pin type)

• Wiring harness between fuel pump control module terminal 2D and body ground (open circuit, ground point looseness or lifting)

― If the inspection items are normal, inspect the fuel pump control module. (See FUEL PUMP CONTROL MODULE INSPECTION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))].)

Continuity Inspection

1. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

2. Disconnect the fuel pump unit connector. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))].)

3. Inspect for continuity at the following terminals:

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With fuel pump unit connector 4-pin type

• fuel pump unit terminal A—fuel pump unit terminal B.

• fuel pump unit terminal B—fuel pump unit terminal C.

• fuel pump unit terminal A—fuel pump unit terminal C.

With fuel pump unit connector 6-pin type

• fuel pump unit terminal A—fuel pump unit terminal D.

• fuel pump unit terminal D—fuel pump unit terminal E.

• fuel pump unit terminal E—fuel pump unit terminal A.

― If there is no continuity, replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))].)