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Home >> Chevrolet >> 2000 >> Cutaway 6.5 F >> Repair and Diagnosis >> External Pages >> Different car >> Section 1 (Anti-Theft System) >> Diagnostic Tests >> DTC B2961: Key In Ignition Circuit Malfunction >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2000 GMC Yukon XL, 2000 GMC Yukon, 2000 GMC Sierra, 2000 Chevrolet Tahoe, and 2000 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.
  1. Connect scan tool. Turn ignition switch to RUN position, engine off. Using scan tool, observe KEY IN IGNITION parameter in appropriate data list. If scan tool displays YES, go to next step. If scan tool does not display YES, go to step  3 .
  2. Remove key from ignition cylinder. Using scan tool, observe KEY IN IGNITION parameter. If KEY IN IGNITION parameter changes state, see DIAGNOSTIC AIDS  . If KEY IN IGNITION parameter does not change state, go to next step.
  3. Turn ignition switch to OFF position. Disconnect key in ignition switch connector. Connect 3-amp fused jumper wire between Light Green wire and Black wire of key in ignition switch connector. Turn ignition switch to RUN position, engine off. Using scan tool, observe KEY IN IGNITION parameter. If scan tool displays YES, go to step  6 . If scan tool does not display YES, go to next step.
  4. Check Light Green wire between key in ignition switch and BCM for open. If problem was found, repair as necessary. After repairs, go to step  9 . If problem was not found, go to next step.
  5. Check BCM connectors for poor connections. If problem was found, repair as necessary. After repairs, go to step  9 . If problem was not found, go to step  7 .
  6. Check key in ignition switch connector for poor connections. If problem was found, repair as necessary. After repairs, go to step  9 . If problem was not found, go to step  8 .
  7. Replace BCM. See BODY CONTROL MODULE  under REMOVAL & INSTALLATION. After repairs, go to step  9 .
  8. Replace key in ignition switch. See appropriate STEERING COLUMN SWITCHES article. After repairs, go to next step.
  9. Using scan tool, clear DTCs. Recheck BCM for DTCs. If DTCs do not reset, system is okay.
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