DTC P009F:00 [PCM (SKYACTIV-D)]

System malfunction location	Fuel pressure relief valve malfunction (stuck close)
Detection condition	• When the following conditions are met, the pressure reduction amount during the fuel pressure relief valve operation is insufficient for several seconds continuously. ― Battery positive voltage: 10—16 V ― During fuel pressure relief valve operation ― Fuel pump: Fuel not discharged ― Fuel injector: During fuel cut ― Fuel temperature: 8.85 °C {47.9 °F} or more ― The following DTCs are not detected • Suction control valve: P0628:00, P0629:00 • Fuel pressure control system: P0093:00 • Fuel pressure relief valve control system: P009B:00, P009C:00, P009D:00 • Fuel temperature sensor: P10D5:00 • Fuel pressure sensor: P01C6:00, P01C5:00, P018D:00, P018C:00, P10CD:00 • LIN communication system: U1201:00, U1202:00, U1203:00, U1204:00
Fail-safe	• Inhibits engine-stop by operating the i-stop function.
Possible cause	• Fuel pressure relief valve malfunction • Suction control valve malfunction • PCM malfunction
System wiring diagram	• Not applicable
Connector diagram	• Not applicable

System malfunction location

Fuel pressure relief valve malfunction (stuck close)

Detection condition

• When the following conditions are met, the pressure reduction amount during the fuel pressure relief valve operation is insufficient for several seconds continuously.

― Battery positive voltage: 10—16 V

― During fuel pressure relief valve operation

― Fuel pump: Fuel not discharged

― Fuel injector: During fuel cut

― Fuel temperature: 8.85 °C {47.9 °F} or more

― The following DTCs are not detected

• Suction control valve: P0628:00, P0629:00

• Fuel pressure control system: P0093:00

• Fuel pressure relief valve control system: P009B:00, P009C:00, P009D:00

• Fuel temperature sensor: P10D5:00

• Fuel pressure sensor: P01C6:00, P01C5:00, P018D:00, P018C:00, P10CD:00

• LIN communication system: U1201:00, U1202:00, U1203:00, U1204:00

Fail-safe

• Inhibits engine-stop by operating the i-stop function.

Possible cause

• Fuel pressure relief valve malfunction

• Suction control valve malfunction

• PCM malfunction

System wiring diagram

• Not applicable

Connector diagram

• Not applicable

Step	Inspection	Results	Action
1	RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION • Record the freeze frame data/snapshot data. Note • Recording can be facilitated using the screen capture function of the PC.	—	Go to the next step.
2	VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY • Verify related Service Bulletins, on-line repair information, or Service Information availability. • Is any related Information available?	Yes	Perform repair or diagnosis according to the available information. • If the vehicle is not repaired, go to the next step.
No	Go to the next step.
3	INSPECT FOR OTHER RELATED DTCs • Perform the DTC inspection for the PCM. (See DTC INSPECTION.) • Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-D)].)
No	Go to the next step.
4	INSPECT FUEL PRESSURE RELIEF VALVE FOR MALFUNCTION • Inspect the applicable part. (See FUEL PRESSURE RELIEF VALVE INSPECTION [SKYACTIV-D 1.8].) • Is the part normal?	Yes	Go to the next step.
No	Repair or replace the malfunctioning location and perform the repair completion verification. (See COMMON RAIL REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
5	INSPECT SUCTION CONTROL VALVE FOR MALFUNCTION • Inspect the applicable part. (See SUCTION CONTROL VALVE INSPECTION [SKYACTIV-D 1.8].) • Is the part normal?	Yes	Go to the next step.
No	Repair or replace the malfunctioning location and perform the repair completion verification. (See SUCTION CONTROL VALVE REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
Repair completion verification 1	VERIFY THAT VEHICLE IS REPAIRED • Install/connect the part removed/disconnected during the troubleshooting procedure. • Clear the DTC recorded in the memory. (See CLEARING DTC.) • Replicate the vehicle conditions at the time the DTC was detected using the following procedure. ― Start the engine and warm it up. ― Stop all electrical loads. (Such as A/C, headlights, blower fan, rear window defroster) ― Drive the vehicle on flat roads under the following conditions 4 times repeatedly. Warning • Observe legal speed limits when driving the vehicle and perform the procedure in a location where safety can be assured. 1. Accelerate to 15 km/h{9.3 mph} and decelerate to 0 km/h {0 mph}. 2. Wait for 20 s while idling. 3. Accelerate to 30 km/h{19 mph}, and decelerate to 0 km/h {0 mph} after driving the vehicle while maintaining the speed for 20 s. 4. Wait for 20 s while idling. 5. Accelerate to 50 km/h {31 mph}, and decelerate to 0 km/h {0 mph} after driving the vehicle while maintaining the speed for 20 s. 6. Wait for 20 s while idling. ― Accelerate to 70 km/h {43 mph} and drive the vehicle while maintaining the speed for 60 s. ― Decelerate to 50 km/h {31 mph} and drive the vehicle while maintaining the speed for 60 s. ― Accelerate to 70 km/h {43 mph} and drive the vehicle while maintaining the speed for 60 s. ― Accelerate to 100 km/h {62.1 mph} and drive the vehicle while maintaining the speed for 30 s. ― Accelerate to 120 km/h {74.6 mph} and decelerate to 0 km/h {0 mph}. ― Stop the engine. • Perform the DTC inspection for the PCM. (See DTC INSPECTION.) • Is the same Pending DTC present?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].) If the CAN communication is normal, perform the diagnosis from Step 1. • If the malfunction recurs, replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
No	Go to the next step.
Repair completion verification 2	VERIFY IF OTHER DTCs DISPLAYED • Perform the DTC inspection. (See DTC INSPECTION.) • Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
No	DTC troubleshooting completed.

Step

Inspection

Results

Action

RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION

• Record the freeze frame data/snapshot data.

Note

• Recording can be facilitated using the screen capture function of the PC.

—

Go to the next step.

VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY

• Verify related Service Bulletins, on-line repair information, or Service Information availability.

• Is any related Information available?

Yes

Perform repair or diagnosis according to the available information.

• If the vehicle is not repaired, go to the next step.

Go to the next step.

INSPECT FOR OTHER RELATED DTCs

• Perform the DTC inspection for the PCM.

(See DTC INSPECTION.)

• Are any other DTCs displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

(See DTC TABLE [PCM (SKYACTIV-D)].)

Go to the next step.

INSPECT FUEL PRESSURE RELIEF VALVE FOR MALFUNCTION

• Inspect the applicable part.

(See FUEL PRESSURE RELIEF VALVE INSPECTION [SKYACTIV-D 1.8].)

• Is the part normal?

Yes

Go to the next step.

Repair or replace the malfunctioning location and perform the repair completion verification.

(See COMMON RAIL REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)

INSPECT SUCTION CONTROL VALVE FOR MALFUNCTION

• Inspect the applicable part.

(See SUCTION CONTROL VALVE INSPECTION [SKYACTIV-D 1.8].)

• Is the part normal?

Yes

Go to the next step.

Repair or replace the malfunctioning location and perform the repair completion verification.

(See SUCTION CONTROL VALVE REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)

Repair completion verification 1

VERIFY THAT VEHICLE IS REPAIRED

• Install/connect the part removed/disconnected during the troubleshooting procedure.

• Clear the DTC recorded in the memory.

(See CLEARING DTC.)

• Replicate the vehicle conditions at the time the DTC was detected using the following procedure.

― Start the engine and warm it up.

― Stop all electrical loads. (Such as A/C, headlights, blower fan, rear window defroster)

― Drive the vehicle on flat roads under the following conditions 4 times repeatedly.

Warning

• Observe legal speed limits when driving the vehicle and perform the procedure in a location where safety can be assured.

1. Accelerate to 15 km/h{9.3 mph} and decelerate to 0 km/h {0 mph}.

2. Wait for 20 s while idling.

3. Accelerate to 30 km/h{19 mph}, and decelerate to 0 km/h {0 mph} after driving the vehicle while maintaining the speed for 20 s.

4. Wait for 20 s while idling.

5. Accelerate to 50 km/h {31 mph}, and decelerate to 0 km/h {0 mph} after driving the vehicle while maintaining the speed for 20 s.

6. Wait for 20 s while idling.

― Accelerate to 70 km/h {43 mph} and drive the vehicle while maintaining the speed for 60 s.

― Decelerate to 50 km/h {31 mph} and drive the vehicle while maintaining the speed for 60 s.

― Accelerate to 70 km/h {43 mph} and drive the vehicle while maintaining the speed for 60 s.

― Accelerate to 100 km/h {62.1 mph} and drive the vehicle while maintaining the speed for 30 s.

― Accelerate to 120 km/h {74.6 mph} and decelerate to 0 km/h {0 mph}.

― Stop the engine.

• Perform the DTC inspection for the PCM.

(See DTC INSPECTION.)

• Is the same Pending DTC present?

Yes

Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.

(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].)

If the CAN communication is normal, perform the diagnosis from Step 1.

• If the malfunction recurs, replace the PCM, then go to the next step.

(See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)

Go to the next step.

Repair completion verification 2

VERIFY IF OTHER DTCs DISPLAYED

• Perform the DTC inspection.

(See DTC INSPECTION.)

• Are any other DTCs displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

DTC troubleshooting completed.

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