Diagnosing Electrical Power Steering (EPS) Issues
Electric steering is a non-hydraulic system assisted by an electric motor operated by a software-driven power steering module.
CAN Communications Diagnostics: Honda Case Study
This Honda was towed in with a loss of power, check engine light on and a P1607 code indicating an internal PCM failure.
Active Drivetrains And Differentials
Vehicles equipped with 4×4 or all-wheel-drive (AWD) systems are designed to provide advantages throughout the year, but winter tends to bring these vehicles into focus.
Trailer Brakes: Connector Outlet Electrical Diagnostics
The owner of a 1999 Dodge 2500 Ram pickup called me mid-summer with an ABS and check engine warning light problem on his instrument panel and no trailer brakes on his fifth-wheel horse trailer.
Speed Density Systems Performance Reliability For Modern Engines
Modern engine technology is changing our Âconcept of how we increase engine torque and fuel economy.
Modern Fuel Control Diagnostics: Sorting Through The Data Stream Maze
Adapted from Gary Gom’s article in ImportCar. When confronted with a fuel control problem on a modern vehicle, I’ll normally use short- and long-term fuel trims to determine if the problem is caused by one of many failures, such as a vacuum leak or a leaking fuel pressure Âregulator. If you’re like me, you’ll
Impact Of Summer Heat On Batteries
Summer temperatures can be a nightmare for car batteries. As a technician, you need to be able to spot the telltale warning signs of weakened batteries and sell your customers on the need for service.
Subaru Pulse-Width Modulated Fuel Pumps
Many technicians aren’t familiar with PWM fuel pumps because they’re generally very reliable. But now that many import vehicles equipped with PWM fuel pumps are rolling up the miles, it’s time to turn the page from diagnosing two-line and single-line mechanically pressure-regulated fuel pumps to diagnosing electronically controlled PWM fuel pumps.
The Case Of The Missing Starter – A Diagnostic Dilemma
A client who owns a heavy-duty diesel shop called me to help diagnose a no-cranking condition on his father-in-law’s 2006 Chevrolet Tahoe.
Parasitic Drain: Jeep Grand Cherokee
As a general rule, a “parasitic drain” of less than 30 milliamps (mA) is normal for most vehicles 15 years old and newer. Keeping in mind that most manufacturers now publish parasitic drain values, let’s assume that a battery drain exceeding 50 mA is cause for concern.
