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Home >> Buick >> 1997 >> Century Custom >> Repair and Diagnosis (Single Page) >> Body & Frame >> Body, Cab Control Systems >> Body Control Module >> Diagnosis & Repair >> DTC B2722, Pass-Key(R) Detection Circuit (Short To Ground) >> Testing
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DTC B2722, Pass-Key(R) Detection Circuit (Short To Ground): Testing

  1. If BCM diagnostic system check was performed, go to next step. If BCM diagnostic system check was not performed, go to BCM DIAGNOSTIC SYSTEM CHECK  .
  2. Insert ignition key into Interrogator Adapter Harness (J-35628-A) to check vehicle key code number. If valid key code exists (No. 1-15), go to next step. If valid key code does not exist, go to step 11).
  3. Remove ignition key from lock cylinder. Disconnect 2-pin connector C207, located on right side of steering column, near steering column bracket. Using DVOM, check resistance between connector C207 terminals (on steering column/pigtail side). If resistance is infinite, go to next step. If resistance is not infinite, go to step 7).
  4. Disconnect BCM 32-pin connector C1. Check for continuity between ground and BCM harness connector C1 terminal D2 (Black/White wire). If continuity exists, go to step 9). If continuity does not exist, go to next step.
  5. Check for continuity between BCM harness connector C1 terminals D2 (Black/White wire) and D3 (Purple/White wire). If continuity exists, go to step 10). If continuity does not exist, go to step 7).
  6. Turn ignition off. Reinstall all components and connectors. Turn ignition on. Clear DTCs. Check for DTCs. If DTC B2722 is sets again, go to step 8). If DTC B2722 does not set again, system is operating properly.
  7. Replace ignition lock cylinder. See appropriate STEERING COLUMN SWITCHES article. Go to step 6).
  8. Turn ignition off. Replace BCM. See REMOVAL & INSTALLATION  . Reprogram BCM. See BCM PROGRAMMING. Go to next step.
  9. Repair short to ground in Black/White wire between BCM connector C1 and connector C207. Go to step 12).
  10. Repair short between Black/White and Purple/White wires between BCM connector C1 and connector C207. Go to step 12).
  11. Replace ignition key. Go to next step.
  12. Turn ignition off. Reinstall all components and connectors. Turn ignition on. Using scan tool, clear DTCs. Perform BCM DIAGNOSTIC SYSTEM CHECK  .
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