ECM/PCM Archives - Page 9 of 9 - Brake & Front End
Predicting Failures

spect that at one time or another, we’ve all had a customer return with a check engine light on with a new fault code that wasn’t there last time they were in. The events probably went something like this: Customer: “You couldn’t see that when you looked at it last time?” Shop: “No ma’am, there’s

Diagnostic Dilemmas: Symptom Diagnosis…The Journey Begins

When I first began my automotive career way back in 1957, the symptoms of an ailing engine were very apparent. A carburetor with a worn accelerator pump, for example, would characteristically stumble on acceleration and a closed-up set of distributor contact points would cause the engine to become very sluggish. Low fuel pressure caused by

Foreign Affairs: Getting Nissan Engines Back to Peak Performance

/Articles/06_01_2007/60754gif_00000014067.gif” width=”156″ height=”146″ alt=”” border=”0″ align=”right” /> In this article, we’ll take a look at some of the common problems that affect engine performance. With on-board diagnostics (OBD), many of these problems will cause a check engine lamp (CEL) and store a code. With most of us becoming comfortable and proficient while working with OBD

Mercedes: Deciphering Driveability Dilemmas

As the oldest surviving automotive manufacturer on the planet, Mercedes-Benz has developed a reputation for superior engineering and quality. Models with new features and mechanical developments have been consistently introduced for more than a century. For the automotive technician, this line of vehicles has been a source of never-ending education. Innovation after innovation has challenged

Diagnostics Through CAN Networks

Since model year 2003, a growing number of domestic and import vehicles have been built with a new onboard communications protocol called CAN (Controller Area Network). CAN is essentially an engineering standard for how computers and modules talk to one another via the serial data bus in a vehicle’s wiring system. It’s a high speed

Advanced Brake Diagnostic Tools

Brake technicians are only as good as the tools they use. I have lived by this statement for a long time and it only makes sense, right? Well, what if I say the most important tool a brake technician has is his mind. The mind is a powerful tool when equipped with the right information,

Volvo Service And Driveability: Ways to Simplify Repairs and Promote Maintenance

Keeping a record of scheduled maintenance and service repairs is probably the best selling feature when the time comes to trade or sell a vehicle. You know the type: They baby their car, and their friends and family want first dibs when they decide to sell it. In most cases, that level of upkeep is

OBD II Diagnostics: Checking into Mode $06

In this scan tool diagnostics article, we take a look at Mode $06 functions which govern non-continuous monitors (EVAP, catalyst, EGR, etc.)

Mastering Mercedes Multiplexing

“CAN” is the new buzz word in automobile diagnostics. It stands for Controller Area Network and is a protocol for onboard diagnostics and scan tools. CAN is a high-speed data link that provides more information at a faster rate for better communication between onboard electronics and external diagnostic equipment. Many manufacturers have already started incorporating

Checking into Mode $06

Mode 06 is the actual system test data that OBD II looks at when it decides to set a pending code or a current fault code. If the test data is within the limits established by the vehicle manufacturer, the item gets a PASS and no codes are set. But if a value is out of range, OBD II flags it with a FAIL and keeps an eye on the component until the system monitor has run at least twice. Then, if the problem is still there, a DTC is set and the MIL light comes on.