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Home >> Cadillac >> 1999 >> Escalade >> Repair and Diagnosis >> External Pages >> Different car >> Section 4 (Anti-Theft System - Escalade, Express, Pickup, SAVANA, TAHOE & YUKON DENALI) >> Diagnostic Tests >> DTC U1016: Loss Of Class 2 Communication With VCM >> Circuit Description

Circuit Description

WARNING: This page does not describe the selected car, but rather 15 other vehicles, including the 2000 GMC Yukon, 2000 GMC Savana Special, 2000 GMC Savana Camper Special, 2000 GMC Savana, and 2000 GMC Pickup. However, it is still accessible from the selected car via links, so may be relevant.

This DTC sets when ignition is active and communication between Passlock™ module and VCM existed for one second, then was lost for more than 5 seconds. This DTC is usually a history DTC. This DTC also sets when VCM has not received a valid state of health message from Passlock™ module. If ignition was off, vehicle will not start. If vehicle was running, vehicle will restart, but SECURITY indicator light will remain illuminated.

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