Serial Data Buses

Diagnosing Serial Data Buses

If serial data buses did not exist, a wiring harness would have to be five times its normal size and use twice as many sensors to deliver the same level of functionality and safety we see in the modern vehicle. For example, take a brake pedal sensor. On a modern vehicle, the position of the…

Common Issues with the 3.5L EcoBoost

With almost 400,000 3.5L EcoBoost engines on the road today, these engines have proven to be a solid power unit. Many of these engines are out of warranty and heading to your shop. Here are the top failures and what to look for: 1. REFLASH: There have been at least seven updates to change calibrations…

cahin tensioner

Diagnosing Water Pump Damage

Symptoms Water pump has missing or broken teeth, or sprocket falls off the shaft. Probable Cause of Failure Misalignment or damage of the tensioner, guide or chain. Corrective Action Visual inspection is required to verify the correct alignment of chain tensioner and guide. Inspect for broken, cracked or missing guide material as well. It is…

HVAC System Sensors

HVAC System Sensors

When a driver sets a temperature in the control head of an HVAC system, what does it mean to the vehicle? New HVAC systems look at more than just blower motor speed, door position and the high-pressure switch voltage. These modern systems are looking at temperatures inside and outside the vehicle. They are also looking…

5.7L HEMI Anatomy

Back in the early ’90s, when Chrysler realized that it would need a new truck motor to replace its 318/360 Magnum engines to meet the coming emissions standards, the company considered two pushrod engines along with one SOHC design and concluded that a pushrod motor with a pair of HEMI heads that really breathed would…

Send this to friend