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Inside The Bosch Xperience Mobile Technician Training

Robert Bosch LLC has been bringing technician training straight to the shop this year with its Bosch Xperience mobile tour, and when it rolled into The Swedish Solution in Orange Village, Ohio, a team of editors from Babcox Media had to check it out. In...

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Oklahoma Shops Organize To Join Auto Care Association

The auto shops in Tulsa, Okla., are organizing an effort to all join the Automotive Service Association in order to improve the overall service levels of the city. ABC Channel 8 in Tulsa, Okla., has the details: Randy Calley of Same Day Auto Repair...

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Service Adviser Pay Program Tips That Work

If you are looking to drive up your profits, you need to ensure you have service advisers that have the right attitude, aptitude and ethics. They will need to have the natural talent to sell, they will need to be well trained, and they will need to have...

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Mercedes-Benz: Installation guidelines for Smart Car front wheel bearing

The typical solution for replacing the front wheel hub on a 2008-‘13 Mercedes-Benz Smart Car is a front wheel hub assembly, including a front wheel hub and knuckle. However, with a wheel hub-only ­solution for the Mercedes Smart Car, like the one offered...

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Kia: Uncovering Unperformed Maintenance

While some vehicle problems will motivate the customer to make an appointment, an equal amount of Kia repair opportunities will be discovered as the vehicle is being serviced. If you’re not already doing so, always encourage your customers to keep...

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The Evolving Oil Change Market

The only constant in the oil change business is change itself, especially if you’re trying to maintain an inventory of engine oil for all makes and models of vehicles. Since Volkswagen began ­requiring application-specific engine oil in the mid-1990s,...

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Snap-on Franchisee Conference Introduces Latest Tool & Equipment Innovations

The Snap-on Tools Franchisee Conference (SFC), held in Orlando, FL, played host to more than 8,000 registered attendees this past weekend; including principals representing more than 3,000 North American routes as well as their families and guests. The...

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TPMS: Weighing The Options

By Sean Phillips, Contributing Writer As a former technician who has dealt with the incredibly wide range and variety of OE tire pressure sensors that shops need to cover, using one of the newest aftermarket systems that can cover the vast majority...

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Making Money Servicing TPMS

If a vehicle leaves your shop with the TPMS light on or flashing, you could be fined upwards of $10,000. Every vehicle since 2008 has been equipped with TPMS in accordance to new government regulations, so this monitoring system has grown rapidly in population...

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Cartridge Oil Filter Tips

Cartridge oil filters account for a large number of oil filter applications in the field. The chances of improperly installing a cartridge oil filter are greater than with a spin-on filter. The key is to take your time, inspect before installing and follow...

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The Case of the Missing Starter

I was called last fall by a client who owns a heavy-duty diesel shop to diagnose a no-cranking condition on his father-in-law’s 2006 Chevrolet Tahoe. Because his work is mainly with heavy-duty trucks, my client knew he was lacking both in tooling and...

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Spark Plug Replacement Do’s and Don’ts

Tooling has changed from the old 13/16-inch spark plug socket to a multiplicity of 5/8-inch long, short, intermediate and swivel, thin-wall sockets needed to ­replace spark plugs on many modern engines. Similarly, tightening spark plugs with the old...

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Home Brake Job BRAKE JOB: 2004-2009 Mazda3

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The 2004-2009 Mazda3 is based on the Ford global C1 platform, shared with the European Ford Focus and Volvo S40.  Nothing is really groundbreaking about the brake system. But, not paying attention to the details can end in a post brake job comeback.

Front Brakes
Pads should be replaced when there is 2mm or less of friction material. The rotors have enough material on them to last at least one turning on the lathe. The runout specification for these vehicles is .002” and disc thickness variation should be far below .0005”.

Mazda claims repeated panic braking may raise the temperature in some portions of the disc plate by approx. 1,000°C (l,832°F). This temperature is almost near impossible to achieve this side of a high-speed police chase.

The calipers mount to the brackets using caliper guide pins with Allen heads. The sleeves  and boots should be disassembled, cleaned and lubricated every time the brakes are replaced. The torque for the guide pins is 21 ft/lbs and the caliper bracket bolts should be tightened to 75 ft/lbs.

Rear Brakes
All Mazda3 models have rear disc brakes. The calipers mount to the brackets using caliper guide pins with Allen heads. The sleeves and boots should be disassembled, cleaned and lubricated every time the brakes are replaced. The torque for the guide pins is 21 ft/lbs and the caliper bracket bolts should be tightened to 55 ft/lbs.

Mazda uses a hand-brake that is incorporated into the rear caliper. They use a couple of systems to retract rear pistons. The later-model cars require the familiar method of turning the piston clockwise while applying pressure, where others will have a plug on the back side of the caliper that provides access for an Allen wrench to facilitate retracting the piston, but be careful as you retract the piston.

After the pads are replaced, pump the pedal and adjust the parking brake mechanism in the rear calipers. If the level has too much travel, perform the following steps:
1. Pump the brake pedal a few times.
2. Remove the service hole cover of the rear console.
3. Turn the adjusting nut and adjust the parking brake lever.
4. After adjustment, pull the parking brake lever one notch and verify that the parking brake warning light illuminates.
5. Verify that the rear brakes do not drag.

ABS/DSC Diagnostics and Repair
The Mazda3 comes in two flavors, ABS and ABS with Dynamic Stability Control. Both systems connect to other vehicle components via a high-speed serial data bus. The DSC system ties more components together like a yaw/pitch sensor and steering position sensor onto the bus.

If you are seeing communication-related DTCs, it is essential that you fully diagnose problems with the system before you start replacing sensors and modules. Some of these vehicles have been on the roads for more than six years and the connections are starting to corrode and fret.

One of the main culprits of ABS/DCS problems are the connectors, especially under the hood where the control/modulator unit connects. Being able to measure values at the connectors and observe data on a scan tool is essential for diagnosing problems.

If a modulator/control unit is replaced, the pressure sensors must be re-calibrated with a scan tool that is able to communicate with the chassis/ABS module. If this is not performed, it can result in brake failure and lock up.

If you have DTCs C1141, C1142, C1143, C1144, C1233, C1234, C1235 or C1236 (ABS wheel-speed sensor/ABS sensor rotor), chances are something is wrong with the wheel bearings. Another cause for these codes could be an accumulation of metal debris on the sensor. The front bearings are press-in cartridge-style units. Rear wheel bearings are hub units. In the front, the tone ring, or encoder, is on the inner seal of the bearing and the sensor is mounted in the knuckle. The parameters for these codes to be set are abnormalities in the signal like a weak signal or large differences in the value when compared to the other sensors.

If you have DTCs C1145, C1155, C1165 or C1175 (open sensor), it could be damaged wiring or a failed sensor. If you have more than one, chances are there is a problem with the connection at the control unit or in the front or rear harnesses for the sensors.

These DTCs will usually clear themselves after repairs are made and the vehicle is driven above 6.2 mph when the self-diagnostic check is performed.

Some customers may report a slight clunk, bang or jolt from the front of the vehicle. This concern will most likely occur during the vehicle’s first forward movement, and after the vehicle sits for a few hours and/or a cold soak. This is a normal operating noise of the ABS system.

If you encounter a customer complaint for this concern, explain that the noise comes from the ABS/TCS/DSC “Malfunction Detection Function” initial check. The initial check is a necessary function to ensure the normal operation of the ABS/TCS/DSC system.

This initial test function occurs during the vehicle’s first forward movement and when the vehicle reaches approximately 6.2 mph.

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Andrew Markel

Andrew Markel is an ASE Certified Technician and former service writer, and he brings this practical knowledge to the Brake & Front End team as editor.
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