7.3 PCM Testing Service (1994.5-2003)

Did you accidentally pull your performance chip out of the PCM while the key was on or with the vehicle running or did the PCM just go out on you? Diesel Technology of Chattanooga can help! If your PCM or IDM for any reason is not rebuild-able they will contact you. They will bench test your PCM and IDM. 

The more info you provide about your vehicle's symptoms and issues, the more thoroughly they can test your modules, and the better guidance they can give you for additional troubleshooting steps.

PCM testing consists of verifying that the PCM boots up, activates the Glow Plug Relay or Module, Fuel Pump, Injector Driver Module, receives a Cam Position Sensor signal, commands the IDM to fire the injectors, activates the appropriate transmission shift solenoids in response to moving the range selector lever, connects to a scan tool, and that it transmits the correct sensor values.

Signals such as the Injection Pressure Regulator and Electronic Pressure Control are also checked with an oscilloscope. After testing, they'll email you with their findings, and suggest additional troubleshooting steps if the PCM tests good. 

If you are running a performance chip, please send it with your PCM. There is no extra charge to test your chip with your PCM. Do not send the cable or switch.

If you are troubleshooting a no-start or injector misfire condition, they recommend you test both units, unless you have ruled out one or the other of the modules by swapping a known-good test unit into the problem vehicle.

Please fill out the form HERE.

The more info you provide about your vehicle's symptoms and issues, the more thoroughly they can test your modules, and the better guidance they can give you for additional troubleshooting steps. 

**The form has to be included in the box with your PCM/IDM!**