VR30DDTT engine
- CHECK FUEL RAIL PRESSURE (FRP) SENSOR POWER SUPPLY-1
- 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 7.
NO
GO TO 2.
- CHECK FRP SENSOR POWER SUPPLY-2
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 5.
NO
GO TO 3.
- CHECK FRP SENSOR POWER SUPPLY CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between FRP sensor harness connector and ECM harness connector.
+
-
Continuity
FRP sensor
ECM
Connector
Terminal
Connector
Terminal
F137
3
F143
66
Existed
- Also check harness for short to power.
Is inspection result normal?
YES
GO TO 4.
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 FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between FRP sensor harness connector and ECM harness connector.
+
-
Continuity
FRP sensor
ECM
Connector
Terminal
Connector
Terminal
F137
1
F143
85
Existed
- Also check harness for short to power.
Is inspection result normal?
YES
GO TO 6.
NO
Repair or replace error-detected parts.
- CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT
- Check the continuity between ECM harness connector and ground.
+
-
Continuity
ECM
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 FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between FRP sensor harness connector and ECM harness connector.
+
-
Continuity
FRP sensor
ECM
Connector
Terminal
Connector
Terminal
F137
2
F143
47
Existed
- Also check harness for short to ground and to power.
Is inspection result normal?
YES
GO TO 8.
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.