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DTC B3031: Controller In Learn Mode: Testing

  1. Perform system check. See SYSTEM CHECK  under SYSTEM TESTING. Go to next step.
  2. Connect scan tool and set it to BFC SECURITY DATA menu. See scan tool manufacturer's instruction. Ensure transmission is in Park (A/T) or Neutral (M/T) and parking brake is on. Turn ignition switch to START position and read PASSLock(R) data voltage. If reading is 5 volts, go to next step. If reading is not 5 volts, clear DTCs from memory (refer to scan tool manufacturer's instructions) and go to SYSTEM CHECK  in SYSTEM TESTING.
  3. Check for a poor connection at PASSLock(R) lock cylinder connector. If a problem is found, repair as necessary. Clear DTCs from memory (refer to scan tool manufacturer's instructions) and go to SYSTEM CHECK  in SYSTEM TESTING. If connection is okay, go to next step.
  4. Turn ignition on. Using DVOM, backprobe PASSLock(R) lock cylinder connector terminal "C" (White wire). See WIRING DIAGRAMS  . Check voltage between PASSLock(R) lock cylinder connector terminal "C" (White wire) and ground. If battery voltage is present, go to step 8). If battery voltage is not present, turn ignition off. Disconnect PASSLock(R) lock cylinder connector and BFC connector C3. Using a DVOM, check continuity between White wire PASSLock(R) lock cylinder connector C2 terminal "C" and ground. If continuity does not exist, go to next step. If continuity exists, repair short to ground in White wire between BFC connector C3 terminal B4 and PASSLock(R) terminal "C". Clear DTCs from memory (refer to scan tool manufacturer's instructions) and go to SYSTEM CHECK  in SYSTEM TESTING.
  5. Using a DVOM, check continuity in White wire between PASSLock(R) lock cylinder connector terminal "C" and BFC connector C3 terminal B4. See WIRING DIAGRAMS  . If reading is zero ohms, go to next step. If reading is greater than zero ohms, repair open in White wire as necessary. Clear DTCs from memory (refer to scan tool manufacturer's instructions) and go to SYSTEM CHECK  in SYSTEM TESTING.
  6. Reconnect BFC connector C3. Turn ignition on. Using DVOM, backprobe BFC connector C3 terminal B4 (White wire). Check voltage between BFC connector C3 terminal B4 (White wire) and ground. If battery voltage exists, go to next step. If battery voltage does not exist, replace BFC and perform reprogramming procedure. See REPROGRAMMING BFC in BODY CONTROL MODULE article. Clear DTCs from memory (refer to scan tool manufacturer's instructions) and go to SYSTEM CHECK  in SYSTEM TESTING.
  7. Check for poor connection at BFC connector C3. If connection is poor, repair as necessary. Clear DTCs from memory (refer to scan tool manufacturer's instructions) and go to SYSTEM CHECK  in SYSTEM TESTING. If BFC connector C3 connection is okay, replace BFC and perform reprogramming procedure. See REPROGRAMMING BFC in BODY CONTROL MODULE article. Clear DTCs from memory (refer to scan tool manufacturer's instructions) and go to SYSTEM CHECK  in SYSTEM TESTING.
  8. Reconnect all disconnected components. Turn ignition on. Using DVOM, backprobe PASSLock(R) lock cylinder connector terminal "B" (Black wire) and "C" (White wire). Check voltage between PASSLock(R) lock cylinder connector terminal "B" (Black wire) and "C" (White wire). If battery voltage exists, go to step 12). If battery voltage does not exist, turn ignition off. Disconnect PASSLock(R) lock cylinder connector and BFC connector C2. Using a DVOM, measure voltage between PASSLock(R) lock cylinder connector C2 terminal "B" (Black wire) and ground. If battery voltage is not present, go to next step. If battery voltage is present, repair short to battery voltage in Black wire between BFC connector C2 terminal A6 and PASSLock(R) lock terminal "B". Clear DTCs from memory (refer to scan tool manufacturer's instructions) and go to SYSTEM CHECK  in SYSTEM TESTING.
  9. Using a DVOM, check continuity between PASSLock(R) lock cylinder connector terminal "B" (Black wire) and ground. If continuity does not exist, go to next step. If continuity exists, repair short to ground in Black wire between BFC connector C2 terminal A6 and PASSLock(R) terminal "B". Clear DTCs from memory (refer to scan tool manufacturer's instructions) and go to SYSTEM CHECK  in SYSTEM TESTING.
  10. Using a DVOM, check continuity in Black wire between PASSLock(R) lock cylinder connector terminal "B" and BFC connector C2 terminal A6. If reading is zero ohms, go to next step. If reading is greater than zero ohms, repair high resistance or open in Black wire as necessary. Clear DTCs from memory (refer to scan tool manufacturer's instructions) and go to SYSTEM CHECK  in SYSTEM TESTING.
  11. Check for poor connection at BFC connector C2 terminal A6. If connection is poor, repair as necessary. Clear DTCs from memory (refer to scan tool manufacturer's instructions) and go to SYSTEM CHECK  in SYSTEM TESTING. If BFC connector C2 connection is okay, replace BFC and perform reprogramming procedure. See REPROGRAMMING BFC in BODY CONTROL MODULE article. Clear DTCs from memory (refer to scan tool manufacturer's instructions) and go to SYSTEM CHECK  in SYSTEM TESTING.
  12. Reconnect all disconnected components. Turn ignition on. Using DVOM, backprobe PASSLock(R) lock cylinder connector terminal "A" (Yellow wire) and "B" (Black wire). Check voltage between PASSLock(R) lock cylinder connector terminal "A" (Yellow wire) and "B" (Black wire). If voltage reading is 5 volts, go to step 14). If voltage reading is not 5 volts, turn ignition off. Disconnect PASSLock(R) lock cylinder connector and BFC connector C2. Using a DVOM, check resistance between PASSLock(R) lock cylinder connector C2 terminal "A" (Yellow wire) and BFC connector C2 terminal B6. If resistance is zero ohms, go to next step. If resistance is greater than zero ohms, repair open in Yellow wire between BFC connector C2 terminal B6 and PASSLock(R) terminal "A". Clear DTCs from memory (refer to scan tool manufacturer's instructions) and go to SYSTEM CHECK  in SYSTEM TESTING.
  13. Check for poor connection at BFC connector C2 terminal B6. If connection is poor, repair as necessary. Clear DTCs from memory (refer to scan tool manufacturer's instructions) and go to SYSTEM CHECK in SYSTEM TESTING. If BFC connector C2 connection is okay, replace BFC and perform reprogramming procedure. See BODY CONTROL MODULE article. Clear DTCs from memory (refer to scan tool manufacturer's instructions) and go to SYSTEM CHECK  in SYSTEM TESTING.
  14. Replace PASSLock(R) sensor. Clear DTCs from memory (refer to scan tool manufacturer's instructions) and go to SYSTEM CHECK  in SYSTEM TESTING.
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