DTC Diagnosis Procedure
- CHECK THE DTC
If P0102 and P0113 are detected at the same time, check power supply and ground circuit of the MAF sensor.
Is applicable DTC detected?
YES
Perform the diagnosis for power supply and ground circuit of the mass air flow sensor. GO TO 4.
NO
GO TO 2.
- CHECK HARNESS CONNECTOR
- Disconnect mass air flow sensor harness connector and ECM harness connector.
- Connect mass air flow sensor harness connector and ECM harness connector.
- Perform DTC confirmation procedure. Refer to Confirmation Procedure .
Is DTC detected?
YES
GO TO 3.
YES
GO TO 4.
NO
INSPECTION END
- 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 4.
NO
Reconnect the parts.
- CHECK MAF SENSOR POWER SUPPLY CIRCUIT
- Disconnect mass air flow (MAF) sensor harness connector.
- Turn ignition switch ON.
- Check the voltage between MAF sensor harness connector and ground.
MAF sensor
Ground
Voltage
Connector
Terminal
F31
5
Ground
Battery voltage
Is the inspection result normal?
YES
GO TO 6.
NO
GO TO 5.
- DETECT MALFUNCTIONING PART
Check the following.
- Harness for open or short between mass air flow sensor and ECM
- Harness for open or short between mass air flow sensor and IPDM E/R
- Loose or poor connection for each connector and harness
Repair open circuit, short to ground or short to power in harness or connectors.
- CHECK MAF SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between MAF sensor harness connector and ECM harness connector.
MAF sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
F31
4
F91
42
Existed
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
GO TO 7.
NO
Repair open circuit, short to ground or short to power in harness or connectors.
- CHECK MAF SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
- Check the continuity between MAF sensor harness connector and ECM harness connector.
MAF sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
F31
3
F91
37
Existed
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
GO TO 8.
NO
Repair open circuit, short to ground or short to power in harness or connectors.
- Check the continuity between MAF sensor harness connector and ECM harness connector.
- CHECK MASS AIR FLOW SENSOR
Refer to Component Inspection .
Is the inspection result normal?
YES
GO TO 9.
NO
Replace mass air flow sensor. Refer to AIR CLEANER AND AIR DUCT : Exploded View .
- CHECK INTERMITTENT INCIDENT
Refer to Inspection .
INSPECTION END