DTC P009C:00 [SKYACTIV-D 1.5]

id0102q2228800

DTC P009C:00

Fuel pressure relief valve control circuit low input

DETECTION CONDITION

•  When the following condition is met, control voltage at fuel pressure relief valve as 1.2 V or less for continuous 1 s (engine off) or continuous 8 times (engine on).

MONITORING CONDITIONS

―  Battery voltage: 8 V or more

―  2 s or more have elapsed since PCM launch

―  Any one of the following conditions is met:

•  Fuel pressure when engine speed is 1,800 rpm or more is 211 MPa {2152 kgf/cm², 30604 psi} or more

•  Engine speed of 3,300 rpm or less (also when vehicle is stopped)

―  The following DTCs are not detected:

•  PCM internal processor malfunction: P0606:00

•  Internal PCM malfunction: P062B:00

Diagnostic support note

•  This is a continuous monitor (CCM).

•  The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle.

•  FREEZE FRAME DATA/Snapshot data is available.

•  DTC is stored in the PCM memory.

FAIL-SAFE FUNCTION

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

POSSIBLE CAUSE

•  Fuel pressure relief valve connector or terminals malfunction

•  Short to ground in wiring harness between the following terminals:

―  Fuel pressure relief valve terminal A—PCM terminal 1DK

―  Fuel pressure relief valve terminal B—PCM terminal 1DG

•  PCM connector or terminals malfunction

•  Fuel pressure relief valve malfunction

•  PCM malfunction

DTC P009C:00	Fuel pressure relief valve control circuit low input
DETECTION CONDITION	• When the following condition is met, control voltage at fuel pressure relief valve as 1.2 V or less for continuous 1 s (engine off) or continuous 8 times (engine on). MONITORING CONDITIONS ― Battery voltage: 8 V or more ― 2 s or more have elapsed since PCM launch ― Any one of the following conditions is met: • Fuel pressure when engine speed is 1,800 rpm or more is 211 MPa {2152 kgf/cm², 30604 psi} or more • Engine speed of 3,300 rpm or less (also when vehicle is stopped) ― The following DTCs are not detected: • PCM internal processor malfunction: P0606:00 • Internal PCM malfunction: P062B:00 Diagnostic support note • This is a continuous monitor (CCM). • The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA/Snapshot data is available. • DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	• Inhibits engine-stop by operating the i-stop function.
POSSIBLE CAUSE	• Fuel pressure relief valve connector or terminals malfunction • Short to ground in wiring harness between the following terminals: ― Fuel pressure relief valve terminal A—PCM terminal 1DK ― Fuel pressure relief valve terminal B—PCM terminal 1DG • PCM connector or terminals malfunction • Fuel pressure relief valve malfunction • PCM malfunction

Diagnostic Procedure

STEP	INSPECTION		ACTION
1	RECORD VEHICLE STATUS AT TIME OF DTC DETECTION TO UTILIZE WITH REPEATABILITY VERIFICATION Note • Recording can be facilitated using the screen capture function of the PC. • Record the FREEZE FRAME DATA/snapshot data on the repair order.	—	Go to the next step.
2	VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available?	Yes	Perform repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	INSPECT FUEL PRESSURE RELIEF VALVE CONNECTOR CONDITION • Switch the ignition off. • Disconnect the fuel pressure relief valve connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 7.
3		No	Go to the next step.
4	INSPECT FUEL PRESSURE RELIEF VALVE CIRCUIT FOR SHORT TO GROUND • Verify that the fuel pressure relief valve and PCM connectors are disconnected. • Inspect for continuity between the following terminals (wiring harness-side) and body ground: ― Fuel pressure relief valve terminal A—PCM terminal 1DK ― Fuel pressure relief valve terminal B—PCM terminal 1DG • Is there continuity?	Yes	Go to the next step.
4		No	Disconnect the PCM connector and inspect the wiring harness for short to ground. • If the short to ground circuit could be detected in the wiring harness: ― Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • Fuel pressure relief valve terminal A—PCM terminal 1DK • Fuel pressure relief valve terminal B—PCM terminal 1DG If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to ground. • If the short to ground circuit could not be detected in the wiring harness: ― Replace the PCM (short to ground in the PCM internal circuit). (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.5].) Go to Step 7.
5	INSPECT PCM CONNECTOR CONDITION • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 7.
5		No	Go to the next step.
6	INSPECT FUEL PRESSURE RELIEF VALVE • Inspect the fuel pressure relief valve. (See FUEL PRESSURE RELIEF VALVE INSPECTION [SKYACTIV-D 1.5].) • Is there any malfunction?	Yes	Replace the common rail, then go to the next step. (See COMMON RAIL REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)
6		No	Go to the next step.
7	VERIFY DTC TROUBLESHOOTING COMPLETED • Always reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See CLEARING DTC [SKYACTIV-D 1.5].) • Perform the KOER self test. (See KOEO/KOER SELF TEST [SKYACTIV-D 1.5].) • Is the same DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.5].) Go to the next step.
7		No	Go to the next step.
8	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [SKYACTIV-D 1.5].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-D 1.5].)
8		No	DTC troubleshooting completed.