DTC Diagnosis Procedure
- CHECK 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
F91
1
3
5 V
Inspection result normal?
YES
GO TO 4.
NO
GO TO 2.
- CHECK FRP SENSOR POWER SUPPLY-II
Check the voltage between FRP sensor harness connector and the ground.
+
-
Voltage
(Approx.)
FRP sensor
Connector
Terminal
F91
1
Ground
5 V
Is inspection result normal?
YES
GO TO 3.
NO
Repair or replace error-detected parts.
- CHECK SENSOR POWER SUPPLY 3 CIRCUIT
Perform DTC Diagnosis Procedure .
Is inspection result normal?
YES
Perform the trouble diagnosis for power supply circuit. Refer to DTC 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.
+
-
Continuity
FRP sensor
ECM
Connector
Terminal
Connector
Terminal
F91
3
F78
13
Existed
Is inspection result normal?
YES
GO TO 5.
NO
Repair or replace error-detected parts.
- CHECK ECM GROUND CIRCUIT
Check the continuity between ECM harness connector and the ground.
ECM
Ground
Continuity
Connector
Terminal
E77
147
Ground
Existed
149
152
Is inspection result normal?
YES
GO TO 6.
NO
Repair or replace error-detected parts.
- 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.
+
-
Continuity
FRP sensor
ECM
Connector
Terminal
Connector
Terminal
F91
2
F78
25
Existed
- Also check harness for short to ground and to power.
Is inspection result normal?
YES
GO TO 7.
NO
Repair or replace error-detected parts.
- CHECK FRP SENSOR
Refer to Component Inspection (Fuel Rail Pressure Sensor) .
Is inspection result normal?
YES
INSPECTION END
NO
Repair or replace error-detected parts.