7.3 PCM + IDM TestingDiesel Technology of Chattanooga
We can bench test your PCM or IDM separately, or both together at the same time.
The more info you provide about your vehicle's symptoms and issues, the more thoroughly we can test your modules, and the better guidance we can give you for additional troubleshooting steps.
You will need to fill out our Customer Vehicle Information sheet with all your information.
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, we'll email you with our 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.
IDM testing consists of verifying that the IDM fires all 8 injectors, runs an Injector Buzz Test to see if it is throwing false codes, and checking the output voltage and waveforms to the injectors with an oscilloscope.
As the IDM ages, the current output drops due drift in the tolerances of various components. The oscilloscope checks show the degree to which the IDM has lost performance.
If you are troubleshooting a no-start or injector misfire condition, we 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.