DTC Diagnosis Procedure
- CHECK DTC PRIORITY
If DTC P2123 is displayed with DTC P0643, first perform the confirmation procedure (trouble diagnosis) for DTC P0643.
Is applicable DTC detected?
YES
Perform diagnosis of applicable DTC. Refer to DTC Description .
NO
GO TO 2.
- CHECK APP SENSOR 1 POWER SUPPLY
- Disconnect accelerator pedal position (APP) sensor harness connector.
- Turn ignition switch ON.
- Check the voltage between APP sensor harness connector and ground.
+
-
Voltage (V)
APP sensor
Connector
Terminal
M124
4
Ground
Approx. 5
Is the inspection result normal?
YES
GO TO 4.
NO
GO TO 3.
- CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between APP sensor harness connector and ECM harness connector.
+
-
Continuity
APP sensor
ECM
Connector
Terminal
Connector
Terminal
M124
4
E152
198
Existed
- Also check harness for short to ground and short to power.
Is the 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 APP SENSOR 1 GROUND CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between APP sensor harness connector and ECM harness connector.
+
-
Continuity
APP sensor
ECM
Connector
Terminal
Connector
Terminal
M124
5
E152
203
Existed
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
GO TO 5.
NO
Repair or replace error-detected parts.
- CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
- Check the continuity between APP sensor harness connector and ECM harness connector.
+
-
Continuity
APP sensor
ECM
Connector
Terminal
Connector
Terminal
M124
6
E152
202
Existed
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
GO TO 6.
NO
Repair or replace error-detected parts.
- Check the continuity between APP sensor harness connector and ECM harness connector.
- CHECK APP SENSOR
Refer to Component Inspection .
Is the inspection result normal?
YES
INSPECTION END
NO
Replace accelerator pedal assembly. Refer to ACCELERATOR CONTROL SYSTEM : Removal & Installation .