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.
BCM Programming & RPO Configuration
Replacement BCM EEPROM chips must be programmed with proper Regular Production Option (RPO) configurations. EEPROM stores vehicle options. When BCM is replaced, replacement BCM must be programmed to identify the following information:
- Country Of Sale (Canada, Europe, US, etc.)
- Front Fog Lights
- HVAC (C60 Manual Or CJ2 Automatic)
- Memory Options
- Real Time Damping (RTD)
- Tire Pressure Monitor (TPM)
If BCM is not properly programmed, vehicle will exhibit a no-start condition. If BCM is not properly programmed, BCM will set default values for some systems. These default values may cause malfunctions in other systems.
BCM must be programmed to accept resistance value of existing vehicle keys to allow PASS-Key operation. When BCM is replaced, BCM is programmed to accept first PASS-Key resistance value detected. If BCM is unable to detect a valid PASS-Key resistance value, BCM will end programming sequence and a BCM DTC B2735 will set. See appropriate ANTI-THEFT SYSTEMS article for reference to PASS-Key.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.