2017 Infiniti G37 Sedan V6-3.7L Diagnostic and Repair Information # 10-059 Date: 100910

Antitheft System - NATS Security VBC Logic
Page 280
Classification: EL10-029
Reference: ITB10-059
Date: September 10, 2010
NATS SECURITY - VBC LOGIC
APPLIED VEHICLE: 2009-2011 All Infiniti with NATS/Immobilizer System
SERVICE INFORMATION
All model year 2009 - 2011 Infiniti 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 operate.
^ 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.