Generic Electronic Module (Gem): Notes

WARNING: This page is about a different car, the 2000 Mercury Mountaineer, 2000 Ford Explorer, 1999 Mercury Mountaineer, and 1999 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Disconnect negative battery cable before disconnecting GEM. Failure to do so will result in GEM storing erroneous codes and may also result in erratic operation of GEM after reconnecting. When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery.

CAUTION: If replacing GEM, it is necessary to upload module configuration information to New Generation STAR (NGS) tester. After installation, download saved module configuration information to new GEM.