Magazine for the auto service professional
Issue link: http://asp.epubxp.com/i/780462
40 | ASP February 2017 Technical Service Bulletins Volkswagen SHORT BUG is bulletin applies to 2007 and later Volkswagen Beetle models equipped with a 2.5L engine. If DTC P3047 (activation starter relay 2 short to B+) sets, this fault may be due to a loose or damaged starter signal wire. Check the ECM T121 connector (red/ black wire at pin 30) for looseness or damage. Repair or replace as needed. Chevrolet DIRTY DEEDS is bulletin applies to 2013-2014 Chevy Impalas equipped with a 2.0 LTG, 2.5 LCV or 2.5 LKW engine. In "rare instances" the tech- nician may find P0011 and/or P0014 codes set in the ECM as history or current. If normal diagnostics do not lead to a resolution, remove the camshaft solenoids and inspect the screens for debris. If debris is present, clean the screens with brake cleaner. Reinstall the solenoids and evaluate if the DTC still sets. If the code resets or if the screen did not have debris, remove the camshaft actuator associated with the DTC(s). Using light air pressure, blow out the oil passages through the camshaft actuator solenoid port in the head while holding a rag over the camshaft actuator oil passages to prevent oil from spraying out. Lubricate the camshaft solenoid seal(s) with clean engine oil and reinstall. Install a new camshaft actuator associated with the code(s). Evaluate and monitor camshaft actuator activity. Cadillac MIGHT NOT BE THE ECM You may experience a 2007-2012 Cadillac Escalade, ESV or EXT that has a P0633 DTC set in the ECM. Also, the Tech 2 will not be able to clear the DTC. is code will set as an indicator that the ECM is in learn mode and not as a fault indicator. Any malfunction that causes a no-crank condition will prevent DTC P0633 from clear- ing. is DTC will clear upon a successful engine crank and start. Prior to diagnosing the DTC or replacing the ECM, ensure that all power moding, VTD and engine cranking systems are operating correctly. Mazda RUSTY BEARING HUM Some 2009-2013 Mazda6 vehicles may exhibit an unusual humming noise from the front wheel bearings. is may be caused by muddy water entering the wheel bearing(s), causing the bearing(s) to rust. A new bearing seal design has been improved to eliminate this concern. 1. Verify the concern. 2. Raise the vehicle on a lift. 3. Turn the front wheels by hand to identify the side(s) with the issue. 4. Perform a wheel bearing excessive play inspection according to the MS3 online