Electric Power Steering: Mating Electrical And Mechanical Diagnostics
Most electric power steering system modules are on the high-speed CAN network with the engine control, ABS and transmission control modules. Some vehicles will also include the body control module and other modules that are critical to the safety of the vehicle. These modules share a lot of data to make sure the driver does not notice when the electric power steering is working.
GM Autoride Diagnostics, Service And Conversion
Autoride comes standard on the GMC Yukon Denali and Yukon XL Denali. The product is also standard on the Cadillac Escalade, Escalade EXT and Escalade ESV, on which it is known as Road Sensing Suspension. GM also offers Autoride as an option for the Chevrolet Suburban, Tahoe and Avalanche 1500, as well as the GMC Yukon XL 1500.
Bushing Inspection And Diagnostics
Most suspension system components pivot upon a rubber bushing that is compressed between an inner and outer metal sleeve. Because the compressed rubber bushing has no moving parts, it allows a maximum range of travel throughout a single plane without the frictional wear created in a conventional metal-to-metal bushing.
Nissan Tech Tip: TPMS Diagnostics
If the TPMS/LTPWS warning light is illuminated (continuously or flashing), the TPMS/LTPWS system can be diagnosed by turning the ignition to the “OFF” and then to the “ON” position. If the TPMS/LTPWS warning light is continuously illuminated (not flashing), the TPMS/LTPWS is operating normally and has detected low tire pressure in one of the tires.
TPMS TIP: Nissan Tire Pressure Diagnostics For Both Lights Checklist
This tech tip applies to Nissan vehicles like the Maxima, Altima and most other models with a Tire Pressure Monitor System (TPMS) or Low Tire Pressure Warning System (LTPWS).
TPMS Diagnostics: MINI Applications
In 2004, MINI was one of the early adopters of tire pressure monitoring systems. This was driven by the lack of space for a spare tire and the use of run-flat tires. The TPMS system on these early models was intended to warn the driver of a tire with low pressure so they could reduce speed and find the nearest shop.
Parking Brake Diagnostics, Repair And Maintenance
The parking or emergency brake has to perform two distinct jobs. First, it must be able to hold the vehicle on an incline. Second, it must be able to stop a vehicle under a specific distance if the hydraulic brakes have failed. These standards are set by the Department of Transportation (DOT), and the kicker is these standards must be met with the force applied by a little old lady. But, over time, the cables can stretch and the friction materials change their length and thickness, which is why adjustments to the system are required.
Strategy Of TPMS Diagnostics
The first step in any TPMS diagnostic strategy is to figure out whether or not your customer’s vehicle actually has a TPMS problem. Why? Simply put, there are a number of factors that can cause a TPMS warning light to illuminate or flash – and some are hard to uncover.
Audi TPMS Diagnostics
Audi Tire Pressure Monitoring Systems (TPMS) are some of the easiest to reset and relearn. The automaker has used both indirect and direct systems during the past decade. Both systems use the same relearn procedure that involves accessing the TPMS settings through the driver information center or infotainment system. The only difference between direct and indirect systems is the last step that may involve driving continuously for 10 minutes or allowing the vehicle to sit for either 10 or 20 minutes.
Air Ride Diagnostics: 2003-2010 VW Touareg Applications
This is a full-feature air ride system designed to improve comfort, stability and off-road capabilities. Some vehicles with the 4XMotion option will also have a sway bar that can be decoupled to increase wheel travel.
