Tech Tip Archives - UnderhoodService
Diagnosing High Failure Rates in OEM Electronic Throttle Bodies

Electronic throttle control faults can occur and they can be frustrating for motorists as well as technicians. 

Audi Tech Tip: Passenger Compartment Not Warming Up?

Code B10D004 will indicate a coolant circulation pump failure.

Delphi Technologies Fuel Systems to Power Your Business

The Delphi Technologies Difference.We start with the OE design and conduct extensive dimensional and material analysis to develop our part that will perform reliably on any vehicle. We’re passionate about our stringent technical standards—it’s in our DNA. Integrated OE expertise Delphi Technologies applies its 80+ years of OE expertise and pioneering technology to every fuel

Nissan Tech Tip: Vehicle Key Not Detected

Nissan keys use radio frequencies (RF) similar to other everyday wireless devices.

Tech Tip: TPMS Relearn Procedures

Double-check as you go that the steps are done correctly. There are no shortcuts to the relearn process.

Tech Tip: Alternator And Battery Testing Diagnostic Tips

For some vehicles, it’s normal to see as high as 16 volts for long periods at a time. For others, it’s ­normal to see as low as 13 volts. For some, a constant 13.6 volts is an indication of a problem.

Tech Tip: Replace A Failed Water Pump And Timing Belt At Once

Here are three main reasons why you should have a conversation with your customer to replace multiple parts simultaneously.

Tech Tip: Fuel Delivery System ElectroStatic Charge Problems

Fuel delivery system components concentrate on the use of specific plastics and nylons to reduce conductivity.

Dayco Tech Tip: Long-Lasting Vehicle Belts

Belts continue to be one of the most frequently replaced wear items on vehicles today. The typical replacement interval for serpentine belts and flat belts today is around 90,000 miles – which for many vehicles means only once every seven to nine years!

Tech Tip: Stud Shearing Problems

During installation, carefully inspect the position of the mount’s recessed slots at the bottom of the mounting plate.

GM Tech Tip: Lin Bus Diagnostics

As more smart motors, switches and sensors are being used, there are more Local Interconnect Network (LIN) buses on vehicles.

Toyota Tech Tip: ABS Noise, Warning Lamps And Code C1431

Some 2012-’13 model year Camry vehicles may exhibit a condition where ABS brake actuator pump motor noise is heard from the engine compartment with Brake ABS and/or TRAC warning lamp(s) illuminated and DTC C1431 stored. A poor ground on the left fender side panel bracket may cause this condition after a collision repair.