LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2002 >> Cavalier Base, 4D Sedan, 2.2 F >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Theft Deterrent System >> Diagnostic Tests >> DTC B2957: Security System Sensor Data Circuit Low >> Testing

DTC B2957: Security System Sensor Data Circuit Low: Testing

  1. If vehicle theft deterrent diagnostic system test has been performed, go to next step. If vehicle theft deterrent diagnostic system test has not been performed, go to VEHICLE THEFT DETERRENT DIAGNOSTIC SYSTEM TEST  under SELF-DIAGNOSTICS.
  2. Connect scan tool to Data Link Connector (DLC). DLC is located at lower left side of instrument panel, near steering column. Momentarily turn ignition switch to START position (do not start engine) and release ignition switch to ON position. Using scan tool, observe PASSLOCK DATA VOLTAGE in BCM SECURITY DATA LIST. If voltage is not .4-4.9 volts, go to next step. If voltage is .4-4.9 volts, perform this procedure while wiggling related wiring and connectors. This can often cause malfunction to appear.
  3. Turn ignition switch to LOCK position. Disconnect Passlock(tm) sensor 3-pin harness connector. Passlock(tm) sensor is located in ignition lock cylinder. Turn ignition switch to RUN position. Using scan tool, observe PASSLOCK DATA VOLTAGE in BCM SECURITY DATA LIST. If voltage is 4.9 volts or less, go to next step. If voltage is greater than 4.9 volts, go to step  7 .
  4. Check for short to ground at Passlock(tm) sensor harness connector Yellow wire terminal. If short to ground is not found, go to next step. If short to ground is found, repair Yellow wire between Passlock(tm) sensor and BCM. After repairs, go to step  9 .
  5. Turn ignition switch to LOCK position. Disconnect BCM 24-pin Brown harness connector C3. BCM is located behind left side of instrument panel. Check for poor connections and loose or corroded terminals at BCM harness connector C3. If problem is not found, go to next step. If problem is found, repair as necessary. After repairs, go to step  9 .
  6. Replace and program BCM. See BODY CONTROL MODULE  under REMOVAL & INSTALLATION. See BODY CONTROL MODULE PROGRAMMING/REGULAR PRODUCTION OPTION CONFIGURATION  . After repairs, go to step  9 .
  7. Check for poor connections and loose or corroded terminals at Passlock(tm) sensor harness connector. If problem is not found, go to next step. If problem is found, repair as necessary. After repairs, go to step  9 .
  8. Replace Passlock(tm) sensor. See PASSLOCK(tm) LOCK CYLINDER/IGNITION LOCK CYLINDER  under REMOVAL & INSTALLATION. Program Passlock(tm) sensor. See PASSLOCK(tm) LEARN PROCEDURE  . After repairs, go to next step.
  9. Use scan tool to clear DTCs. Turn ignition switch to OFF position. Turn ignition switch to RUN position. Using scan tool, select BCM DISPLAY DTCs function on scan tool. If DTC B2957 do not reset, system is okay. If DTC B2957 resets, go to step  3 .
scientia non olet · About LEMON Manuals