Golf GTI L4-2.0L (ABA) (1997)
Technical Service Bulletin # 2499-04
Date: 990820
Mass Air Flow Sensor - Coated With Oil
Group: 24
Number: 99-04
Date: Aug. 20, 1999
Subject:
Thin Coating of Oil Collects on Mass Air Flow (MAF)
Sensor
Model(s):
All with 2.OL (OBDII) 1996 - 1998 to VIN: WM143854
Supersedes T.B. Group 24 Number 99-02 dated Apr. 12, 1999
Superseded due to addition to VIN range, air cleaner inspection and Warranty Claim information
Condition
Oil vapors from Positive Crankcase Ventilation system collecting on MAF sensor.
The procedure applies to vehicles within the applicable Emissions Warranty, use the following:
Part Identifier: 2445
Labor Operation: 2445510 8OTU
Use quantity 0.5 of Part No: ZVW 805 001 per Warranty claim.
Service Procedure
Service
Clean MAF sensor element and install breather valve kit Part No: 037 198 002
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Obtain radio code.
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Note customer's preset radio stations.
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Ensure ignition is switched OFF.
-
Disconnect Battery Ground (GND) Strap.
MAF sensor, cleaning
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Remove intake air duct (between MAF sensor and throttle body) and discard.
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Remove MAF sensor.
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Carefully clean MAF sensor from both sides using a solvent based electronic cleaner which is safe on plastics and leaves no residue, such as Part No.
ZVW 805001 or equivalent. One can will clean approx. 2-3 MAF sensors.
CAUTION!
The MAF sensor film is very delicate. DO NOT touch the film during repair. DO NOT use any harsh cleaners such as carburetor cleaners. Always
read and follow precautions listed on cleaner container. DO NOT use compressed air to dry. This will damage the MAF sensor.
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Inspect air cleaner for oil saturation and replace if necessary.
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Reinstall MAF sensor.
Breather valve, installing