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Home >> Chevrolet >> 1997 >> Corvette Standard >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Body Control Module >> Diagnosis & Repair >> DTC B2722: Pass-Key(R) Detection Circuit (Short To Ground) >> Testing

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 9).
  3. Using Interrogator Adapter Harness (J-35628-A), perform lock cylinder test. See manufacturer's instructions. If problem is found, go to step 8). If no problem is found, go to next step.
  4. Turn ignition off. Disconnect ignition lock cylinder connector C3. Turn ignition on. At BCM side of ignition lock cylinder connector C3, use DVOM to check voltage between terminals "A" (White/Black wire) and "B" (Purple/White wire). If about 5 volts exists, go to step 6). If about 5 volts does not exist, go to next step.
  5. Check for open or short in circuits No. 1073 (White/Black wire) and No. 1074 (Purple/White wire) between BCM and ignition switch. If no problem is found, go to step 10). If problem is found, repair as necessary. Go to step 11).
  6. Check for intermittent in ignition lock cylinder circuit. See DIAGNOSTIC AIDS. If no problem is found, go to next step. If problem is found, repair as necessary. Go to step 11).
  7. Turn ignition off. Reinstall all components and connectors. Turn ignition on. Clear DTCs. Wait 5 seconds and check for DTCs. If DTC B2722 is current, go to step 10). If DTC B2722 is not current, system is operating properly.
  8. Replace ignition lock cylinder. See appropriate STEERING COLUMN article in STEERING section. Go to step 11).
  9. Replace ignition key. Go to step 11).
  10. Replace BCM. See REMOVAL & INSTALLATION  . Reprogram BCM. See BCM PROGRAMMING/RPO CONFIGURATION  . Go to next step.
  11. Turn ignition off. Reinstall all components and connectors. Turn ignition on. Clear DTCs. Perform BCM DIAGNOSTIC SYSTEM CHECK  .
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