Dtc Description

DTC Description

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connectors

  • Fuel rail pressure sensor circuit is open or shorted.

  • Sensor power supply 2 is shorted.

• Fuel rail pressure sensor

• Each sensor, connected with sensor power supply 2 circuit

FAIL-SAFE

Not applicable

Confirmation Procedure

Confirmation Procedure

1. 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: Refer to DTC Description.

   • DTC P0090: Refer to DTC Description.

   NO >>

   GO TO 2.

2. PRECONDITIONING

   If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

   TESTING CONDITION:

   Before performing the following procedure, confirm that battery voltage is 11 V or more at idle.

   >>

   GO TO 3.

3. PERFORM DTC CONFIRMATION PROCEDURE

   1. Start engine and let it idle for at least 1 minute.

   2. Check DTC or 1st trip DTC.

   Is DTC or 1st trip DTC detected?

   YES >>

   Proceed to DTC Diagnosis Procedure.

   NO-1 >>

   To check malfunction symptom before repair: Refer to Intermittent Incident.

   NO-2 >>

   Confirmation after repair: INSPECTION END

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

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.

1. 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: Refer to DTC Description.

   • DTC P0090: Refer to DTC Description.

   NO >>

   GO TO 2.

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

   1. Turn ignition switch OFF.

   2. Disconnect FRP sensor harness connector.

   3. Turn ignition switch ON.

   4. Check the voltage between FRP sensor harness connector terminals.

      FRP sensor			Voltage (Approx.)
      Connector	+	−
      	Terminal
      F101	1	3	5 V

   Is inspection result normal?

   YES >>

   GO TO 8.

   NO >>

   GO TO 3.

3. CHECK FRP SENSOR POWER SUPPLY-2

   Check the voltage between FRP sensor harness connector and ground.

   +		−	Voltage (Approx.)
   FRP sensor
   Connector	Terminal
   F101	1	Ground	5 V

   Is inspection result normal?

   YES >>

   GO TO 6.

   NO >>

   GO TO 4.

4. CHECK FRP SENSOR POWER SUPPLY CIRCUIT

   1. Turn ignition switch OFF.

   2. Disconnect ECM harness connector.

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

      FRP sensor		ECM		Continuity
      Connector	Terminal	Connector	Terminal
      F101	1	F24	43	Existed

   Is inspection result normal?

   YES >>

   GO TO 5.

   NO >>

   Repair or replace malfunctioning part.

5. 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.

6. CHECK FRP SENSOR GROUND CIRCUIT

   1. Turn ignition switch OFF.

   2. Disconnect ECM harness connector

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

      FRP sensor		ECM		Continuity
      Connector	Terminal	Connector	Terminal
      F101	3	F24	45	Existed

   4. Also check harness for short to power.

   Is inspection result normal?

   YES >>

   GO TO 7.

   NO >>

   Repair or replace malfunctioning part.

7. CHECK ECM GROUND CIRCUIT

   1. Check the continuity between ECM harness connector and the ground.

      ECM		—	Continuity
      Connector	Terminal
      F24	5	Ground	Existed
      	65
      F25	69
      E16	157
      	159
      	162

   2. Also check harness for short to power.

   Is inspection result normal?

   YES >>

   INSPECTION END

   NO >>

   Repair or replace malfunctioning part.

8. CHECK FRP SENSOR SIGNAL CIRCUIT

   1. Turn ignition switch OFF.

   2. Disconnect ECM harness connector.

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

      FRP sensor		ECM		Continuity
      Connector	Terminal	Connector	Terminal
      F101	2	F24	44	Existed

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

   Is inspection result normal?

   YES >>

   GO TO 9.

   NO >>

   Repair or replace malfunctioning part.

9. CHECK FRP SENSOR

   Refer to Component Inspection.

   Is inspection result normal?

   YES >>

   INSPECTION END

   NO >>

   Replace FRP sensor. Refer to Exploded View.