PR25DD engine
- CHECK DTC PRIORITY
If P0122 or P0123 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Is applicable DTC detected?
YES
Perform diagnosis of applicable. Refer to DTC Index .
NO
GO TO 2.
- CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY
- Turn ignition switch OFF.
- Disconnect electric throttle control actuator harness connector.
- Turn ignition switch ON.
- Check the voltage between electric throttle control actuator harness connector and ground.
+
-
Voltage
(Approx.)
Electric throttle control actuator
Connector
Terminal
F57
2
Ground
5 V
Is the inspection result normal?
YES
GO TO 4.
NO
GO TO 3.
- CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY CIRCUIT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between electric throttle control actuator harness connector and ECM harness connector.
+
-
Continuity
Electric throttle control actuator
ECM
Connector
Terminal
Connector
Terminal
F57
2
F90
95
Existed
- Also check harness for short to power.
Is the inspection result normal?
YES
Perform the trouble diagnosis for power supply circuit.
NO
Repair or replace error-detected parts.
- CHECK THROTTLE POSITION SENSOR 2 GROUND CIRCUIT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between electric throttle control actuator harness connector and ECM harness connector.
+
-
Continuity
Electric throttle control actuator
ECM
Connector
Terminal
Connector
Terminal
F57
4
F90
90
Existed
Is the inspection result normal?
YES
GO TO 5.
NO
Repair or replace error-detected parts.
- CHECK THROTTLE POSITION SENSOR 2 INPUT SIGNAL CIRCUIT
- Check the continuity between electric throttle control actuator harness connector and ECM harness connector.
+
-
Continuity
Electric throttle control actuator
ECM
Connector
Terminal
Connector
Terminal
F57
3
F90
89
Existed
- Also check harness for short to ground and to power.
Is the inspection result normal?
YES
GO TO 6.
NO
Repair or replace error-detected parts.
- Check the continuity between electric throttle control actuator harness connector and ECM harness connector.
- CHECK THROTTLE POSITION SENSOR
Check the throttle position sensor. Refer to Component Inspection .
Is the inspection result normal?
YES
Check intermittent incident. Refer to Intermittent Incident .
NO
Replace electric throttle control actuator. Refer to Removal and Installation .