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DTC B2965: Key-In-Ignition Circuit Open

  1. Turn ignition on. Using scan tool, select KEY-IN-IGNITION SWITCH. Cycle ignition on and off while observing scan tool display. If scan tool display does not match actual ignition switch position, go to next step. If scan tool display matches actual ignition switch position, problem is intermittent. Check for poor connection to Body Control Module (BCM). Repair as necessary and retest operation.
  2. Turn ignition off. Gain access to Body Control Module (BCM), located under upper instrument panel trim panel, behind instrument cluster. See BODY CONTROL MODULE (BCM)  under REMOVAL & INSTALLATION. Disconnect Brown 24-pin BCM connector. Connect DVOM between ground and Brown 24-pin BCM connector terminal B12 (Light Green wire). See Figure. If continuity exists with key in ignition switch, go to next step. If continuity does not exist with key in ignition switch, go to step  4.
  3. Check for poor connection to BCM. Repair as necessary and retest operation. If BCM connection checks okay, replace BCM. See BODY CONTROL MODULE (BCM)  under REMOVAL & INSTALLATION. Retest operation.
  4. Repair open in Light Green wire between Brown 24-pin BCM connector terminal B12 and ignition switch. See WIRING DIAGRAMS . Repair as necessary and retest operation.
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