DTC Diagnosis Procedure
- INSPECTION START
Confirm the detected DTC.
Which DTC is detected?
P0102
GO TO 2 .
P0103
GO TO 3 .
- CHECK INTAKE SYSTEM
Check the following for connection.
- Air duct
- Vacuum hoses
- Intake air passage between air duct to intake manifold
Is the inspection result normal?
YES
GO TO 3 .
NO
Reconnect the parts. Refer to Exploded View .
- CHECK MAF SENSOR POWER SUPPLY
- Turn ignition switch OFF.
- Disconnect mass air flow (MAF) sensor harness connector.
- Turn ignition switch ON.
- Check the voltage between MAF sensor harness connector and ground.
+
-
Voltage
MAF sensor
Connector
Terminal
F53
2
Ground
Battery voltage
Is the inspection result normal?
YES
GO TO 5 .
NO
GO TO 4 .
- CHECK MAF SENSOR POWER SUPPLY CIRCUIT
- Turn ignition switch OFF.
- Disconnect IPDM E/R harness connector.
- Check the continuity between MAF sensor harness connector and IPDM E/R harness connector.
+
-
Continuity
MAF sensor
IPDM E/R
Connector
Terminal
Connector
Terminal
F53
2
E119
4
Existed
- Also check harness for short to ground.
Is the inspection result normal?
YES
Perform the trouble diagnosis for power supply circuit.
NO
Repair or replace error-detected parts.
- CHECK MAF SENSOR GROUND CIRCUIT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between MAF sensor harness connector and ECM harness connector.
+
-
Continuity
MAF sensor
ECM
Connector
Terminal
Connector
Terminal
F53
3
F77
80
Existed
Is the inspection result normal?
YES
GO TO 6 .
NO
Repair or replace error-detected parts.
- CHECK MAF SENSOR INPUT SIGNAL CIRCUIT
- Check the continuity between MAF sensor harness connector and ECM harness connector.
+
-
Continuity
MAF sensor
ECM
Connector
Terminal
Connector
Terminal
F53
4
F77
82
Existed
- Also check harness for short to ground and to power.
Is the inspection result normal?
YES
GO TO 7 .
NO
Repair open circuit or short to ground or short to power in harness or connectors.
- Check the continuity between MAF sensor harness connector and ECM harness connector.
- CHECK MAF SENSOR
Check the MAF sensor. Refer to Component Inspection .
Is the inspection result normal?
YES
Check intermittent incident. Refer to Intermittent Incident .
NO
Replace mass air flow sensor. Refer to Exploded View .