Diagnostics Archives - Page 2 of 46 - UnderhoodService
Ignition System Do’s and Don’ts

Why do ignition systems give technicians problems when diagnosing ignition-related misfires? The answer is that some technicians use tests that might give inconclusive results or do damage to the coil or drivers inside a module.

Charging for Diagnostic Time

Diagnostic work is more sophisticated and your techs’ time is worth charging for. This video is sponsored by Auto Value and Bumper to Bumper.

Chrysler’s Totally Integrated Power Module

The TIPM is on the CAN bus, any issues with the communication between the ECM, ABS and BCM can cause problems with the TIPM.

High Pressure Direct Injection Fuel Systems

The main destroyer of high-pressure fuel pumps is a lack of oil changes.

Engine Panel Diagnostics

Engine panels cut down engine noise and absorb small leaks from the engine. This video is sponsored by Auto Value and Bumper to Bumper.

ADAS Calibration Tips

Here are 10 tips to follow during ADAS Calibration.

Cabin Air Filter Replacement

There are three major reasons to replace a cabin air filter in the winter.

Battery Charging and Diagnostics

Here are six tips to use when diagnosing a vehicle with a dead battery. 

Why Do Timing Chains Stretch?

As the timing chain wears, it can change the timing of the camshaft and crankshaft.

Reflashing Power Supplies

A power supply to keep the system voltage consistent is a required piece of equipment to perform a reflash procedure.

Today’s Fuel Pressure Diagnostics

Direct injection pressure is measured with sensors, and you’ll need a scan tool to measure the signals

OBDII Connectors

OBDII connectors serve as the main communication point between the technician and the vehicle.