Diagnosis Procedure
- CHECK GROUND CONNECTION
- Turn ignition switch OFF.
- 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.
- CHECK INTAKE AIR TEMPERATURE SENSOR POWER SUPPLY CIRCUIT
- Disconnect mass air flow (MAF) sensor (bank 1) (intake air temperature sensor is built-in) harness connector.
- Turn ignition switch ON.
- Check the voltage between MAF sensor (bank 1) harness connector and ground.
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.
- CHECK INTAKE AIR TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between MAF sensor (bank 1) harness connector and ECM harness connector.
MAF sensor (bank 1) ECM Continuity Connector Terminal Connector Terminal F86 1 F110 42 Existed - 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.
- CHECK INTAKE AIR TEMPERATURE SENSOR
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 "EXPLODED VIEW ".
- CHECK INTERMITTENT INCIDENT
Refer to "INTERMITTENT INCIDENT ".
: INSPECTION END