Air Flow Meter/Sensor: Service and Repair

Mass Air Flow Sensor (Hot film type)

REMOVAL / PROCEDURE # 1

NOTE: Do not drop or subject the sensor to shock. Do not put objects inside the sensor.

1. Disconnect mass air flow sensor connector.
2. Loosen air intake hose retaining clamps on both sides of mass air flow sensor.
3. Disconnect air intake hose from mass air flow sensor.




4. Remove two bolts attaching mass air flow sensor to mounting bracket.
5. Remove mass air flow sensor.

Installation
1. Attach mass air flow sensor to air intake hose and to mounting bracket.
2. Replace two bolts to retain mass air flow sensor to mounting bracket.

Tightening Torque: 69 - 6.3 lb-in (7.8 - 10.8 N.m, 0.8 - 1 kg-m)

3. Reconnect air intake hose to the mass air flow sensor.
4. Tighten bolts of retaining clamps on both sides of mass air flow sensor.




5. Reconnect mass air flow sensor connector to sensor.
6. Warm up engine to normal operating temperature and let engine idle.
7. Connect voltmeter between terminal 4 (RED/WHT wire) and ground.
8. Verify that the voltage varies between 0.8 V - 1.2 V.
9. Rev up engine and verify that voltage varies between 3.5 V - 4 V.




10. If voltage is not within specification, replace mass air flow sensor.


REMOVAL / PROCEDURE # 2

NOTE: Be sure ignition key is in OFF position before starting this repair.

1. Disconnect connector from mass air flow sensor by depressing the spring latch.
2. Loosen hose clamp and disconnect air intake hose from sensor.
3. Remove two bolts from sensor bracket.




4. Remove sensor from air cleaner housing.

Installation
1. Install mass air flow sensor onto air cleaner housing and tighten two bolts.
2. Reconnect air intake hose to sensor and tighten clamp.
3. Reconnect mass air flow sensor connector.