Nissan Maxima Service and Repair Manual: B2191 difference of key
Performs ID verification through BCM and Intelligent Key when push-button ignition switch is pressed.
Prohibits the start of engine when an unregistered ID of Intelligent Key is used.
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
Insert the Intelligent Key in the key slot. Press the push-button ignition switch.
Check "Self Diagnostic Result" with CONSULT.
Perform initialization with CONSULT. Re-register all Intelligent Keys.
For initialization and registration of Intelligent Key, refer to CONSULT Immobilizer mode and follow the onscreen instructions.