DTC Diagnosis Procedure
- INSPECTION START
Confirm the detected DTC.
Which DTC is detected?
GO TO 2.
- 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
F54
40
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
F54
38
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 .