Nissan Maxima Service and Repair Manual: B2191 difference of key

B2190 nats antenna AMP.

Description 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 us ...

B2192 ID discord, IMMU-ECM

Description BCM performs the ID verification with ECM that allows the engine to start. Start the engine if the ID is OK. ECM prevents the engine from starting if the ID is not registered. BCM st ...

Other materials:

Antenna AMP 
Removal and Installation  REMOVAL Remove the rear pillar finisher RH. Refer to INT-27, "Exploded View". Detach the antenna amp. harness clip (A). Disconnect the harness connectors (B) from the antenna amp. (1). Remove the antenna amp. screw (C) and the antenna amp. (1).  ...

B2623 inside key antenna 3
Description Detects whether Intelligent Key is inside the vehicle. Installed in the trunk room. DTC Logic NOTE: The Signal Tech II Tool (J-50190) can be used to perform the following functions. Refer to the Signal Tech II User Guide for additional information. Check Intelligent Ke ...

Multifunction switch
Removal and Installation REMOVAL Remove cluster lid D. Refer to IP-18, "Removal and Installation". Remove the four multifunction switch screws (A) and the multifunction switch (2) from cluster lid D (1). : Metal clip INSTALLATION Installation is in the reverse order ...