Diagnosis Procedure

1. Turn ignition switch OFF.
2. Check ground connection M95. Refer to Ground Inspection in CIRCUIT INSPECTION .

   Is the inspection result normal? 

   YES: GO TO  2.

   NO: Repair or replace ground connection.

1. Disconnect mass air flow (MAF) sensor (bank 1) (intake air temperature sensor is built-in) harness connector.
2. Turn ignition switch ON.
3. Check the voltage between MAF sensor (bank 1) harness connector and ground.
   VOLTAGE REFERENCE TABLE
   
   

   MAF sensor (bank 1)		Ground	Voltage (V)
   Connector	Terminal
   F86	2	Ground	Approx. 5

   Is the inspection result normal? 

   YES: GO TO  3.

   NO: 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 (bank 1) harness connector and ECM harness connector.
   CONTINUITY REFERENCE TABLE
   
   

   MAF sensor (bank 1)		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   F86	1	F110	42	Existed

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

   Is the inspection result normal? 

   YES: GO TO  4.

   NO: Repair open circuit, short to ground or short to power in harness or connectors.

Refer to COMPONENT INSPECTION .

Is the inspection result normal? 

YES: GO TO  5.

NO: Replace mass air flow sensor (bank 1) (with intake air temperature sensor).

Refer to INTERMITTENT INCIDENT .

INSPECTION END