Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Programmable Module Installation (PMI)
- Make sure to use the flash cable when programming calibrations or running a PMI routine on the PCM.
The PMI configuration method is used when a new programmable module is to be installed. During the PMI routine the WDS or equivalent Tester attempts to gather two pieces of information:
- option content information from the old module (module configuration and customer preference settings)
- the vehicle identification number (VIN) from the PCM
During PMI the WDS or equivalent Tester first looks to the PCM for the VIN of the vehicle. Once the VIN is retrieved the WDS or equivalent Tester will carry out a self-test of the suspect module to determine if the module has been configured.
- If DTC B2477 is present the module does not contain complete configuration information. The PMI routine will then halt and give instructions on how to proceed.
- If DTC B2477 is not present the module will allow the WDS or equivalent Tester to retrieve its option content information. The WDS or equivalent Tester will then store the option content information and the VIN.
The WDS or equivalent Tester can store the combined option content information and VIN for only one module at a time. Once information is stored, the WDS or equivalent Tester cannot be used to retrieve any other option content information without erasing the previous option content information. Make sure the new module is on hand for installation before retrieving option content information data from the old module.
After the new module is installed, use the WDS or equivalent Tester to restore the option content information into the new module.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.