Diagnosis Procedure

Confirm the detected DTC.

Which DTC is detected?

P0102

GO TO 2 .

P0103

GO TO 3 .

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.

1. Disconnect mass air flow (MAF) sensor harness connector.
2. Turn ignition switch ON.
3. Check the voltage between MAF sensor harness connector and ground.

   MAF sensor		Ground	Voltage
   Connector	Terminal
   F73	5	Ground	Battery voltage

Is the inspection result normal?

YES

GO TO 5 .

NO

GO TO 4 .

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.

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between MAF sensor harness connector and ECM harness connector.

   MAF sensor		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   F73	4	F78	42	Existed

4. Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

GO TO 6 .

NO

Repair open circuit, short to ground or short to power in harness or connectors.

1. Check the continuity between MAF sensor harness connector and ECM harness connector.

   MAF sensor		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   F73	3	F78	37	Existed

2. 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.

Refer to Component Inspection (MAF Sensor) .

Is the inspection result normal?

YES

INSPECTION END

NO

Replace mass air flow sensor. Refer to Exploded View .