Cold Weather May Cause Problems for Mazda EPB
This bulletin applies to 2016 Mazda CX-5 vehicles built before June 9, 2015. In cold weather (-4 to 14 degrees F), some vehicles may exhibit the EPB (electric parking brake) warning light on, with one or more of the following DTCs:
- C112A:77 (incorrect electric parking brake motor gear unit position)
- C2005:07 (mechanical problem of RH electric parking brake motor gear unit)
- C2005:19 (electric parking brake motor gear unit RH circuit malfunction)
- C2005:74 (RH electric parking brake motor gear unit power transmission impossible)
- C2006:07 (mechanical problem of RH electric parking brake motor gear unit)
- C2006:19 (electric parking brake LH motor gear unit circuit malfunction)
- C2006:74 (electric larking brake LH motor gear unit power transmission impossible)
Note: DTC C2005:19 and/or C2006:19 should always be present. If neither is present, this bulletin does not apply.
|Photo Credit: Mitchell 1
The conditions noted above occur when pressing the EPB switch to release the electric parking brake when the EPB will not release. The concern may be caused by the EPB motor gear unit dimensions being out of specification. The machining dimensions of the EPB motor gear unit have since been improved to eliminate the concern.
Replace the electric parking brake motor gear unit and the rear brake calipers.
P/N PART
KA0G-26-8EXA............ EPB motor gear unit
KAY0-26-61X................rear brake caliper RH
KAY0-26-71X................rear brake caliper LH
KAY0-26-44Z.................caliper seal kit
9956-21-000.................gasket
About the Author
Information courtesy of Mitchell 1
Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.
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.