Titan 4WD V8-5.6L (VK56DE) Flex Fuel (2009)
Body Control Module: Technical Service Bulletins
Antitheft System - NATS Security VBC Logic
Date: September 10, 2010
NATS SECURITY - VBC LOGIC
APPLIED VEHICLE: 2009 - 2011 All Nissan with NATS / Immobilizer System
All model year 2009 - 2011 Nissan vehicles equipped with NATS/Immobilizer system have the new VBC (Validate Before Crank) starter relay logic.
VBC (Validate Before Crank) Logic:
^ The BCM will make sure that a valid (registered) key is being used before engaging the starter relay. If the key is not authenticated the starter will not
^ If the engine cranks, the issue is not related to NATS. Do not replace NATS components (BCM, I-Key, FOB Reader or RF Receiver). Refer to ASIST
for further diagnostic information as needed.