BCM Programmable Read Only Memory (Prom): Installation
- Place new PROM in carrier upside-down on flat surface (pins facing up). Using a narrow blunt tool, press the PROM body down on both sides of retainer bar so top of the PROM is flush with top of the carrier.
- Position PROM carrier squarely over PROM socket in BCM. Firmly press down on top of carrier. Alternately pressing down on either end of carrier will securely seat PROM. Install PROM access cover. Install BCM in vehicle.
- Perform PROM functional check. Turn ignition on. If the following conditions result, check PROM for proper orientation, bent or broken pins, and complete insertion.
- Climate Control Panel displays "-151" and no key response.
- Fuel Data Center (if applicable) is blank and no key response.
- A/C compressor is disabled.
- Heater Vent-Air Conditioning (HVAC) in defrost mode with blower on high.
- No BCM-to-ECM data communication.
- Vacuum fluorescent display dimming, parking lights on, commanded to full brightness.
- If not fully seated, remove access cover and press firmly on carrier. If pins are bent, remove PROM, straighten pins and reinstall. If pins break or crack during straightening, replace PROM. If PROM was installed backward, it must be replaced.
NOTE:
When the CCP is displaying a prom error "-151" the diagnostic mode may not be entered.