DTC Diagnosis Procedure
- CHECK INTAKE SYSTEM
Check the following for connection.
- Air duct
- Vacuum hoses
- Intake air passage between air duct and intake manifold
Is the inspection result normal?
YES
GO TO 2.
NO
Reconnect the parts.
- CHECK MASS AIR FLOW (MAF) SENSOR POWER SUPPLY
- Turn ignition switch OFF.
- Disconnect 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 4.
NO
GO TO 3.
- CHECK MASS AIR FLOW (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
F54
40
Existed
- Also check harness for short to power.
Is the inspection result normal?
YES
GO TO 5.
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
F54
38
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 MAF sensor harness connector and ECM harness connector.
- CHECK INTAKE AIR TEMPERATURE SENSOR
Check the intake air temperature sensor. Refer to Component Inspection .
Is the inspection result normal?
YES
GO TO 7.
NO
Replace MAF sensor (with intake air temperature sensor). Refer to Exploded View .
- CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Check the EVAP control system pressure sensor. Refer to Component Inspection .
Is the inspection result normal?
YES
GO TO 8.
NO
Replace EVAP control system pressure sensor. Refer to Removal and Installation .
- 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 MAF sensor. Refer to Exploded View .