Procedure after ECM Replacement
WARNING: This page is about a different car, the 2008 Suzuki Grand Vitara. However, it is still accessible from the selected car via links, so may be relevant.
After ECM is replaced with new one or used one, the transponder code in the transponder built in the ignition key has to be registered with ECM. To register transponder code in the ignition key with ECM, perform "Replace New ECM" mode of SUZUKI scan tool referring to "SUZUKI Tech 2 Operator's Manual" which comes with scan tool.
NOTE:
A maximum of four transponder codes can be registered with ECM.