Tech Tip: MIL On/DTC P2004 on Miata and MazdaSpeed Models
On some vehicles, after sitting overnight and being started, the MIL comes on and DTC P2004 sets into PCM memory. This occurs because vacuum (momentarily) does not flow into the Variable Tumble Control System (VTCS) shutter valve actuator.
Engine Maintenance: OBD II Diagnostics, Misfire Codes, Fuel Trim Faults, Driveability and More
As automotive electronics diagnostics continues to evolve, so do the tools that are need to diagnose and repair today’s complex engine and electronics systems. This lineup will arm you will some diagnostic tips and give you some invaluable service advantages on Porsche, BMW, Hyundai and Mazda models.
Tech Tip: Easy Fix for Mazda TPS Connection
Some Mazda B-2500 drivers may complain of a high idle in vehicles with a manual transmission. This may be caused by a poor electrical connection at the wire harness to the Throttle Position Sensor (TPS). A service kit (P/N 1F00-18-145) is available to resolve this concern. Correct the condition by following the steps in this Tech Tip.
Tech Tip: Mazda Seat Heater Needs a Boost
Some Mazda6 drivers may complain that the seat warmers turn off too early or may not heat to their satisfaction. The operating temperature of the new seat warmer has been increased on later vehicles by 14 degrees F (on average) to address this concern.
Tech Tip: Solving Lower Ball Joint Removal and Installation Issues
When installing a replacement ball joint in these applications, technicians may note that the new ball joint may not fit tight in the opening of the lower control arm.
Tech Tip: Mazda MPV Brake Noise Keeps ‘Popping’ Up
Mazda MPV owners may complain about rear brake noise. While applying the brakes under normal stopping conditions, usually at low speeds, a metallic popping, clicking or squealing sound can be heard coming from the rear brakes. This may be caused by uneven contact between the brake lining and the brake drum.
Tech Tip: Taking Advantage of an On-Car Lathe
Well-maintained bench and on-car lathes can both do an excellent job of machining rotors. However, according to advice from the new Bendix Answerman, Chuck Kennedy, knowing when and how to use an on-car lathe can help eliminate wasted hours and extra work while also providing more accuracy and a better finish ….
Tech Tip: Steering Position and Yaw
The Electronic Stability Control (ESC) program uses the Anti-Lock Brake System (ABS) and Electronic Throttle Control (ETC) to maintain vehicle stability in a cornering maneuver. The ESC program requires the communication between the Engine Control Module (ECM) and ABS controller. This communication takes place on the Controlled Area Network (CAN) buss of the vehicle. The program uses input from the following sensors: steering wheel position, throttle pedal position, throttle position, engine speed, brake switch, wheel speed, yaw and ….
Tech Tip: Drivetrain Noises and Wheel Bearing Replacement
One of the toughest challenges we face as import specialist techs is noise complaints. These aren’t necessarily difficult from the technical or nuts and bolts perspective as much as from the diagnostic process.
Tech Tip: Mazda Steering Rack Noise
Some 2001-’04 Tributes may experience premature wear and/or noise from the tie rod end, especially from the outer tie rod. This procedure is designed to provide a more detailed procedure for inspecting tie rod ends. It’s also intended to help prevent unnecessary replacement of the steering rack when diagnosing customer concern of ….
Mazda Tech Tip: Curing Rough Idle During or Immediately After a Cold Start
Automotive fuel with high alcohol content may damage the fuel pressure regulator diaphragm. The damage to the diaphragm may allow fuel to enter the vacuum supply line for the fuel pressure regulator. The vacuum supply line uses the No. 3 intake runner as the vacuum source. The unmetered fuel entering the No. 3 cylinder on cold starts may cause a rich mixture misfire.
Honda Tech Tip: Dealing with EGR Issues
Exhaust gas recirculation (EGR) has been used for years to control combustion temperature to prevent spark knock as well as control NOx emissions. For the most part, these systems were trouble-free and required service only if you were dealing with a spark knock issue, or if the valve opened too early, resulting in a tip-in acceleration stumble, or the more common, bad idle quality caused by the valve not closing completely at idle.