LEMON Manuals: Even more car manuals for everyone
Home >> Buick >> 1998 >> Regal LS >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Body Control Module >> Diagnostic Tests >> DTC B0702: Rap Relay Circuit (Short To Ground Or Open) >> Testing

DTC B0702: Rap Relay Circuit (Short To Ground Or Open): Testing

  1. If BCM diagnostic system check was performed, go to next step. If BCM diagnostic system check was not performed, see procedures in BCM DIAGNOSTIC SYSTEM CHECK  .
  2. If vehicle is a Century Custom model, go to next step. If vehicle is not a Century Custom model, go to step 4).
  3. Century Custom model is not equipped with RAP feature. Permanently disable DTC B0702 by reprogramming BCM. See procedures in BCM PROGRAMMING  . Go to step 18).
  4. Check INADV POWER BUS fuse (15-amp), located in instrument panel fuse block. If fuse is blown, go to next step. If fuse is okay, go to step 6).
  5. Replace INADV POWER BUS fuse. Check INADV POWER BUS fuse. If fuse is blown, go to step 11). If fuse is okay, go to next step.
  6. Disconnect RAP relay. See COMPONENT LOCATIONS  . Connect a test light between RAP relay harness connector terminal C2 (Orange wire) and ground. If test light illuminates, go to next step. If test light does not illuminate, go to step 12).
  7. Turn ignition switch to LOCK position. Disconnect BCM Pink 32-pin connector C1. Using DVOM, check resistance between BCM harness connector C1, terminal C5 (Black wire) and ground. If resistance is infinite, go to next step. If resistance is not infinite, go to step 13).
  8. Using DVOM, check resistance between BCM harness connector C1, terminal C5 (Black wire) and RAP relay harness connector terminal A1 (Black wire). If resistance is less than 2 ohms, go to next step. If resistance is not less than 2 ohms, go to step 14).
  9. Reconnect RAP relay. Connect a 10-amp fused jumper wire between BCM harness connector C1, terminal C5 (Black wire) and ground. Operate radio and power windows. If radio and power windows operate, go to next step. If radio and power windows do not operate, go to step 15).
  10. Reconnect BCM connector C1. Using scan tool, clear DTCs. Turn ignition switch to LOCK position. Wait 10 seconds. Turn ignition switch to RUN, then LOCK position. Open a vehicle door. Using scan tool, check for codes. If DTC B0702 is set, go to step 16). If DTC B0702 is not set, go to step 17).
  11. Repair short to ground in Orange wire between RAP relay and instrument panel fuse block. Go to step 18).
  12. Repair poor connection or open in Orange wire between RAP relay and instrument panel fuse block. Go to step 18).
  13. Repair short to ground in Black wire between RAP relay and BCM connector C1. Go to step 18).
  14. Repair poor connection or open in Black wire between RAP relay and BCM connector C1. Go to step 18).
  15. Replace RAP relay. Go to step 18).
  16. Check for poor terminal connection at BCM connector C1, terminal C5. If terminal connection is okay, replace BCM. See REMOVAL & INSTALLATION. Reprogram BCM. See BCM PROGRAMMING  . Go to step 18).
  17. System is operating properly at this time. See DIAGNOSTIC AIDS. After any repairs are made, go to next step.
  18. Turn ignition switch to LOCK position. Reinstall all components and connectors. Turn ignition switch to RUN position. Using scan tool, clear DTCs. Check for DTCs. If any DTCs are current, perform BCM DIAGNOSTIC SYSTEM CHECK  . If no DTCs are current, system is operating properly.
scientia non olet · About LEMON Manuals