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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 B2947: PASSLOCK™ Sensor Power Circuit Low >> Diagnostic Procedure

Diagnostic Procedure

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.
  1. Turn ignition off. Disconnect Passlock™ module connector. Check for continuity between Passlock™ module harness connector terminal A5 (Red/White wire) and ground. See Figure. If continuity does not exist, go to next step. If continuity exists, go to step  3.
  2. Replace Passlock™ module. See PASSLOCK™ MODULE  under REMOVAL & INSTALLATION. After repairs, go to step  5.
  3. Disconnect Passlock™ sensor connector at base of steering column. Check for continuity between Passlock™ module harness connector terminal A5 (Red/White wire) and ground. See WIRING DIAGRAMS . See Figure. If continuity does not exist, go to next step. If continuity exists, repair short to ground in Red/White wire.
  4. Replace Passlock™ sensor. See PASSLOCK™ LOCK CYLINDER  under REMOVAL & INSTALLATION. After repairs, go to next step.
  5. Reconnect all connectors and components. Turn ignition on. Using scan tool, clear all DTCs. Perform reprogramming procedure. See PROGRAMMING .
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