5 Tech Tips: A battery fix, corroded brakes & more
Check Corvette Battery
When performing service on a 2014-2019 Chevy Corvette, you may find DTC B1517 set in one or more modules. First check the battery cable connections. The small black wire that connects to the larger battery negative cable may be loose or damaged. When reviewing the vehicle's past history, you may find that the battery was recently replaced and the small black wire may have been neglected or damaged. Any loose connection or damage to this circuit can cause a B1517.
Nissan Heat Shield Rattle
If you determine that a rattle noise is found at the right front of a 2018-2020 Nissan Armada, check the clearance between the heat shield above the front right-hand tube and the frame. Clearance should be at least 10mm. The clearance between the rear cooler and heater pipe and the heat shield (above the exhaust front tube) should be at least 6mm.
Ford Camera Washer
Some 2015-2020 Ford F-150 (except Raptor), 2017-2020 F-Super Duty, and 2018-2020 Expedition vehicles equipped with a front camera washer may exhibit a fluid leak at the front camera washer jet when not in use. This is likely caused by a worn or damaged internal rubber seal in the jet washer. If the unit leaks, replace the washer with P/N HC3Z-17603-B.
Tesla RDU
If you’re servicing a 2021-2022 Tesla Model S Palladium or Model X Palladium, be sure to check the fluid level in the Plaid Rear Drive Unit (RDU) gearbox. Due to a faulty gauge used in the factory fluid filling process, the volume may be less than 2.5 liters. When checking fluid, if metallic particles are found, replace the RDU (P/N 1762000-00-D). If OK, fill to specification.
Mercedes Brake Caution
Mercedes-Benz strongly recommends cleaning any corrosion and scaling on the hubs when performing brake service. Use the ATE Teves Hub Cleaning Kit to remove corrosion/scaling over the entire area where the brake disc mounts to the hub flange. Failure to do so may cause an excessive buildup which can create adverse forces that may result in brake vibration/judder.
About the Author
Mike Mavrigian
Motor Age Editor
Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety of specialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.