Engine Control Module (ECM): Notes
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 1999 Lexus SC 400, 1999 Lexus SC 300, 1999 Lexus RX 300, 1999 Lexus LX 470, and 1999 Lexus LS 400. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
If ECM is replaced, ECM must be programmed with proper ignition key code for engine immobilizer system. For programming procedures, see COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION.