Air Flow Meter/Sensor: Service and Repair
Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor ReplacementRemoval Procedure
IMPORTANT: Use care when handling the mass air flow/intake air temperature (MAF/IAT) sensor. Do not dent, puncture, or otherwise damage the honey-cell located at the air inlet end of the MAF/IAT. Do not touch the sensing elements or allow anything including cleaning solvents and lubricants to come in contact with them. Use a small amount of a non-silicone based lubricant, on the air duct only, to aid in installation. Do not drop or roughly handle the MAF/IAT sensor.
1. Raise the Cab.
2. Remove the two fasteners (1) securing air intake duct to the chassis.
3. Disconnect the MAF/IAT sensor electrical connector (1).
4. Loosen the clamp (2) securing the MAF/IAT sensor to the air intake duct.
5. Loosen the clamp (3) securing the MAF/IAT sensor to the air cleaner.
6. Remove the MAF/IAT from the air cleaner.
Installation Procedure
IMPORTANT: The embossed arrow on the MAF/IAT sensor indicates the proper air flow direction. The arrow must point toward the engine.
1. Locate the air flow direction arrow on the MAF/IAT sensor.
2. Install the MAF/IAT sensor on to the air cleaner housing.
3. Tighten the clamp securing the MAF/IAT sensor to the air cleaner duct (3).
4. Install the air intake duct to the MAF/IAT sensor and tighten the clamp (2).
5. Connect the MAF/IAT sensor electrical connector.
NOTICE: Fastener Notice
6. Install the two fasteners (1) to the air intake duct securing it to the chassis.
Tighten
Tighten the fasteners to 10 N.m (89 lb in)
7. Lower the cab.
