Auto Service Professional

FEB 2018

Magazine for the auto service professional

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Page 32 of 61

31 | ASP February 2018 Technical 3. Switch the ignition ON, while maintaining the depressed pedal and EPB switch. 4. You should hear the caliper motors performing the automatic adjustment and the yellow warning light should go out, indicating maintenance mode has ended. 5. Switch the ignition OFF. Other EPB tips and tricks If working on some models of VW/Audi with an integrated EPB, not only will you need a scan tool to put the calipers into service mode and then re-initialize them, but you may also need to enter the actual brake pad material thickness. e EPB system will use an algorithm to calculate the wear on the rear brake pads. is replaces the need for a pad wear sensor. Even if you have done the pad replacement properly, the brake wear warning light may stay on and trouble codes may be present until this brake pad thickness information is set into the EPB module. So, make a quick measurement of the pad thick- ness just in case you need this information. Many EPB-equipped vehicles need soft- ware updates to fix issues that could cause either the EPB to stick, drag, not release, or illuminate the EPB light. GM's Impala, some Cadillac models, Subarus and some Jeep Ren- egades have TSBs for reflashes and software updates. ese updates correct different EPB issues from false applications to brake drag. Honda has a recall to eliminate an issue that will cause the rear brakes to drag on some EPB-equipped Civics, and the fix is a software update. Mazda's also has a recall on its EPB system. A sealing issue on the rear integrated caliper design may allow water to enter, causing cor- rosion. is corrosion can cause the caliper to jam or fail to properly engage. Some Jeep Renegade models have the EPB module located in the left rear cargo area and water could enter the module or the connec- tor. is can cause the EPB not to release or result in service light concerns. Bring this to a stop Yes, a scan tool is going to be the manu- facturer's recommended method for repair or service, but many manufacturers provide a non-scan tool service mode, with the Fiat/ Chrysler process by far the easiest. A scan tool will be required for diagnostics, but most good scan tools can perform the needed tasks. Reflashing the EPB software is a different story and may need dedicated manufacturer's equipment and services. Most techs will agree that working with an EPB-integrated caliper design is easier to service without a parking brake cable, and that's something that most techs will embrace. ■ The use of the EPB integrated caliper is becoming very popu- lar. These photos were taken over two days at our shop. Jeff Taylor boasts a 32-year career in the automotive industry with Eccles Auto Service in Dundas, Ontario, as a fully licensed professional lead technician. While continuing to be "on the bench" every day, Taylor is also heavily involved in government focus groups, serves as an accomplished technical writer and has competed in international diagnostic competitions as well as providing his expertise as an automotive technical instructor for a major af termarket parts retailer.

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