DTC Diagnosis Procedure
- CHECK DTC PRIORITY
If DTC P0193 is displayed with DTC P0088 or P0090, first perform the confirmation procedure (trouble diagnosis) for DTC P0088 or P0090.
Is DTC P0088 or P0090 detected?
YES
Perform diagnosis of applicable.
- DTC P0088: Refer to DTC Description .
- DTC P0090: Refer to DTC Description .
NO
GO TO 2.
- CHECK FUEL RAIL PRESSURE (FRP) SENSOR POWER SUPPLY-I
- Turn ignition switch OFF.
- Disconnect FRP sensor connector.
- Turn ignition switch ON.
- Check the voltage between FRP sensor harness connector terminals.
FRP sensor
Voltage
(Approx.)
Connector
+
-
terminal
F137
3
1
5 V
Inspection result normal?
YES
GO TO 8.
NO
GO TO 3.
- CHECK FRP SENSOR POWER SUPPLY-II
Check the voltage between FRP sensor harness connector and the ground.
+
-
Voltage
(Approx.)
FRP sensor
Connector
Terminal
F137
3
Ground
5 V
Is inspection result normal?
YES
GO TO 6.
NO
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
F137
3
F143
66
Existed
- Also check harness for short to power and short to ground.
Is inspection result normal?
YES
GO TO 5.
NO
Repair or replace error-detected parts.
- 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
Repair or replace error-detected parts.
- 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
F137
1
F143
85
Existed
- Also check harness for short to power.
Is inspection result normal?
YES
GO TO 7.
NO
Repair or replace error-detected parts.
- CHECK ECM GROUND CIRCUIT
- Check the continuity between ECM harness connector and ground.
ECM
--
Continuity
Connector
Terminal
F143
3
Ground
Existed
F142
87
88
E152
199
201
204
- Also check harness for short to power.
Is the inspection result normal?
YES
INSPECTION END
NO
Repair or replace error-detected parts.
- Check the continuity between ECM harness connector and ground.
- 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
F137
2
F143
47
Existed
- Also check harness for short to power and short to ground.
Is inspection result normal?
YES
GO TO 9.
NO
Repair or replace error-detected parts.
- CHECK FRP SENSOR
Check the FRP sensor. Refer to Component Inspection .
Is inspection result normal?
YES
INSPECTION END
NO
Repair or replace error-detected parts.