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Home >> Oldsmobile >> 1998 >> Bravada >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Body Control Module >> Diagnosis & Testing >> DTC B2961: Ignition 1 - Key In/Out Mismatch >> Diagnostic Procedures

Diagnostic Procedures

  1. Perform TBC module diagnostic system check. See procedures in TBC MODULE DIAGNOSTIC SYSTEM CHECK  . After performing system check, go to next step.
  2. Install scan tool. Turn ignition switch to RUN position. Using scan tool, monitor ignition key in/out parameter. If scan tool indicates that key is in, go to next step. If scan tool does not indicate that key is in, go to step 8).
  3. Turn ignition off. Using scan tool, monitor ignition 1 status. If scan tool indicates that ignition is inactive, problem is intermittent. See DIAGNOSTIC AIDS. If scan tool does not indicate that ignition is inactive, go to next step.
  4. Check GAUGES fuse in instrument panel fuse block. If fuse is okay, go to next step. If fuse is open, go to step 16).
  5. Turn ignition off. Disconnect Brown TBC module harness connector. Turn ignition on. Check voltage between ground and TBC module harness connector terminal B2 (Pink wire). If battery voltage is present, go to step 19). If battery voltage is not present, go to next step.
  6. Turn ignition off. Reconnect all components. Clear DTCs. Turn ignition off for 10 seconds. Turn ignition switch to RUN position. Check if DTC B2961 is set as a current code. If code is current, go to next step. If code is not current, problem is intermittent. See DIAGNOSTIC AIDS.
  7. Replace TBC module. Program TBC and perform relearn procedure. See procedures in TBC MODULE PROGRAMMING/RPO CONFIGURATION  and TBC/BCM RELEARN PROCEDURE  . After programming module, go to step 20).
  8. Turn ignition off. Disconnect 48-pin harness connector at base of steering column. Disconnect Light Blue TBC module harness connector. Check resistance between TBC module harness connector terminal B9 (Light Green wire) and 48-pin harness connector terminal B3 (Light Green wire). If resistance is 5 ohms or less, go to next step. If resistance is not 5 ohms or less, go to step 13).
  9. Insert ignition key in ignition switch. Check resistance between 48-pin harness connector terminals B3 (Light Green wire) and B4 (Black wire). If resistance is 5 ohms or less, go to next step. If resistance is not 5 ohms or less, go to step 14).
  10. Check resistance between ground and 48-pin harness connector terminal B4 (Black wire). If resistance is 5 ohms or less, go to next step. If resistance is not 5 ohms or less, go to step 15).
  11. Reconnect all connectors. Clear DTCs. Turn ignition off for 10 seconds. Turn ignition switch to RUN position. Check if DTC B2961 is set as a current code. If code is current, go to next step. If code is not current, problem is intermittent. See DIAGNOSTIC AIDS.
  12. Replace TBC module. Program TBC and perform relearn procedure. See procedures in TBC MODULE PROGRAMMING/RPO CONFIGURATION  and TBC/BCM RELEARN PROCEDURE  . After programming module, go to step 20).
  13. Repair open in circuit No. 80 (Light Green wire). After repairs, go to step 20).
  14. Replace ignition lock cylinder. After repairs, go to step 20).
  15. Repair open in or poor ground in circuit No. 1850 (Black wire). After repairs, go to step 20).
  16. Replace GAUGES fuse. Turn ignition switch to RUN position. Check fuse. If fuse blows, go to step 18). If fuse is okay, go to next step.
  17. Clear DTCs. Turn ignition off for 10 seconds. Turn ignition switch to RUN position. Check if DTC B2961 is set a current code. If code is current, go to step 5). If code is not current, go to step 2).
  18. Repair short to ground in circuit No. 39 (Pink wire). After repairs, go to step 20).
  19. Repair open or short to voltage in circuit No. 39 (Pink wire). After repairs, go to next step.
  20. Clear DTCs. After clearing DTCs, perform TBC module diagnostic system check. See TBC MODULE DIAGNOSTIC SYSTEM CHECK  .
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