Auto Diagnostics and Codes
Servicing Intelligent Air Ride Systems

Air ride diagnostics is more than a spray bottle of soapy water. On today’s late-model vehicles, it requires a scan tool, meter and scope. Swapping components will only lead you down a diagnostic black hole that leads to an angry customer and parts supplier.

Wheel Speed Sensor Diagnostics for Meters and Scopes

There is no way to quickly tell if a Wheel Speed Sensor (WSS) is passive or active. Both sensors have two wires and are located in the same position on the vehicle. Often, the service information will not indicate what types of sensors are on the vehicle

Fuel Pump Diagnostics – Using Voltage Drops and Current Draw

Fuel pumps and voltage drops are never a good combination – at least the wrong kind of voltage drops. Good voltage drops occur with fuel pumps that are given multiple speeds with a module that is connected to a computer with a dedicated signal wire that tells the module to go to a lower or higher speed.

Steering Angle Sensor Diagnostics

Measuring the steering wheel position angle and rate of turn, which are critical for Electronic Stability Control (ESC) systems, is the job of the Steering Angle Sensor (SAS). The scan tool will typically display the information in degrees.

Brake System Scan Tools: The New Essential Tool

While there are many times where you will be able to repair a vehicle’s brakes without a scan tool, you only have to run into one car that needs this to make it worth having. The reality is that if your customer’s vehicle is 10 years old or newer, there’s nearly a 100% chance that you could need a scan tool to perform some sort of test/repair on the brake system.

BRAKE JOB: 2004-2009 Mazda3

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.

Tech Update: Can ‘Add-Ons’ Affect CAN Systems? Yes, They Can!

Get any teenager their first car and the first thing they want to do is modify it with new wheels, a different exhaust, seat covers or, the most important and popular upgrade, the stereo. You know, when they have to get to school with all their buddies in the car, they’ve got to have those tunes. They can’t be seen around town with a dull factory radio or wimpy stock wheels.

Tech Update: HVAC Diagnostics

Leave it to the OEMs to take a simple system like heating and air conditioning and turn it into an electronic jumble of wiring, sensors and computer components.

Tech Tip: Ringing Sound Coming from Jeep’s Propeller Shaft When Shifting from ‘D’ to ‘R’

A ringing, snapping or popping sound may be heard coming from the driveline when the transmission is shifted from Forward to Reverse or Reverse to Forward. The sound may also occur when the brakes are released after shifting into or out of Drive or Reverse.

A/C Update: Rising Temperatures Create an Increase in A/C-Related Audi Service

As we move through spring and into summer, temperatures begin to heat up in most of the country. This is a time many drivers begin using the cool settings on their vehicle’s climate control system – only to find the air conditioning unit not functioning properly. As the temperatures outside rise, so too, will the number of customers in your shop with A/C-related problems.

TPMS: Tire Pressure Monitoring Service for All Shops

Recently, an owner of a 2008 Lincoln Navigator brought their vehicle in for a tire rotation. The tires were rotated front to rear. The customer drove away not knowing he was in great peril. A few days later, the right rear picked up a small leak. The TPMS system turned on the dashlight and indicated

Downloading Repairs

Have you looked at technical service bulletins lately? Especially ones for vehicles built since 2004? The fixes have changed drastically. I remember a time, not too long ago when the fix in a typical TSB was to install an updated part. From where I stand now in a Ford dealership, it seems like the hardware