PR25DD engine

WARNING: This page is about a different variant/trim than selected.

NOTE: Turning the ignition switch ON with FRP sensor harness connector disconnected causes ECM to detect DTC P0190. Be sure to erase the DTC when the diagnosis procedure.

CHECK DTC PRIORITY
If DTC P0193 is displayed with DTC P0088 or P0090, first perform the trouble diagnosis for DTC P0088 or P0090.

Is other DTC detected?

YES

Perform diagnosis of applicable.
- DTC P0088: DTC Description
- DTC P0090: DTC Description
NO

GO TO 2.

CHECK FUEL RAIL PRESSURE (FRP) SENSOR POWER SUPPLY-1

Turn ignition switch OFF.
Disconnect FRP sensor harness connector.
Turn ignition switch ON.

Check the voltage between FRP sensor harness connector terminals.

FRP sensor			Voltage (Approx.)
Connector	+	-
	Terminal
F116	3	1	5 V

Is inspection result normal?

YES

GO TO 8.

GO TO 3.

CHECK FRP SENSOR POWER SUPPLY-2

Check the voltage between FRP sensor harness connector and ground.

+		-	Voltage (Approx.)
FRP sensor
Connector	Terminal
F116	3	Ground	5 V

Is inspection result normal?

YES

GO TO 6.

GO TO 4.

CHECK FRP SENSOR POWER SUPPLY CIRCUIT

Turn ignition switch OFF.
Disconnect ECM harness connector.

Check the continuity between FRP sensor harness connector and ECM harness connector.

FRP sensor		ECM		Continuity
Connector	Terminal	Connector	Terminal	Continuity
F116	3	F91	43	Existed

Is inspection result normal?

YES

GO TO 5.

Repair or replace malfunctioning part.

CHECK SENSOR POWER SUPPLY 2 CIRCUIT
Refer to Diagnosis Procedure .

Is inspection result normal?

YES

Perform the trouble diagnosis for ECM power supply circuit. Refer to Diagnosis Procedure .

NO

Replace malfunctioning part.

CHECK FRP SENSOR GROUND CIRCUIT

Turn ignition switch OFF.
Disconnect ECM harness connector

Check the continuity between FRP sensor harness connector and ECM harness connector.

FRP sensor		ECM		Continuity
Connector	Terminal	Connector	Terminal	Continuity
F116	1	F91	45	Existed

Also check harness for short to power.

Is inspection result normal?

YES

GO TO 7.

Repair or replace malfunctioning part.

CHECK ECM GROUND CIRCUIT

Check the continuity between ECM harness connector and the ground.

ECM		Ground	Continuity
Connector	Terminal
F91	5	Ground	Existed
	65
F90	69
	70
E31	157
	159
	162

Also check harness for short to power.

Is inspection result normal?

YES

INSPECTION END

Repair or replace malfunctioning part.

CHECK FRP SENSOR SIGNAL CIRCUIT

Turn ignition switch OFF.
Disconnect ECM harness connector.

Check the continuity between FRP sensor harness connector and ECM harness connector.

FRP sensor		ECM		Continuity
Connector	Terminal	Connector	Terminal	Continuity
F116	2	F91	44	Existed

Also check harness for short to ground and short to power.

Is inspection result normal?

YES

GO TO 9.

Repair or replace malfunctioning part.

CHECK FRP SENSOR
Refer to Component Inspection .

Is inspection result normal?

YES

INSPECTION END

NO

Replace FRP sensor. Refer to FUEL INJECTOR AND FUEL TUBE : Exploded View .