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HOMESERVICE MANUALSCHEVROLET2002IMPALA LSREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESBODY CONTROL MODULESSELF-DIAGNOSTIC SYSTEMDOOR SYSTEM DIAGNOSTIC SYSTEM CHECK
2002 Chevrolet Impala LS

Door System Diagnostic System Check

2002 Chevrolet Impala LSSECTION Door System Diagnostic System Check
NOTE: Use this check as starting point for any door system complaint.
  1. Turn ignition switch to OFF position. Connect scan tool to Data Link Connector (DLC). Turn ignition switch to RUN position. If scan tool powers up, go to next step. If scan tool does not power up, go to TEST D: SCAN TOOL DOES NOT POWER UP  under SYSTEM TESTS.
  2. Turn ignition switch to RUN position. Using scan tool, attempt to establish communications with Body Control Module (BCM). If communication is established, go to next step. If communication cannot be established, go to TEST C: SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE  under SYSTEM TESTS.
  3. Select BODY CONTROL MODULE DTCS function on scan tool. If scan tool displays any DTCs, go to next step. If scan tool does not display any DTCs, perform appropriate procedure in appropriate POWER DOOR LOCKS article.
  4. Using scan tool, check for DTCs U1000-U1305. If DTCs are not present, go to next step. If DTCs are present, go to TEST C: SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE  under SYSTEM TESTS.
  5. Check for DTC B1000. If DTC is not present, go to next step. If DTC B1000 is present, go to DTC B1000: CONTROL MODULE MALFUNCTION  under DIAGNOSTIC TESTS.
  6. Check for DTCs B1339 or B1349. If DTCs are not present, go to next step. If any DTC is present, go to DIAGNOSTIC TROUBLE CODE DEFINITIONS . Repair as necessary.
  7. Check for DTCs beginning with a "P". If DTCs beginning with a "P" are not present, go to next step. If DTCs beginning with a "P" are present, go to DIAGNOSTIC TROUBLE CODE DEFINITIONS . Repair as necessary.
  8. Check for DTCs B3069, B3127, B3128, B3132, B3133, B3137, B3138 or B3272. If DTCs are not present, perform appropriate symptom test. See SYSTEM TESTS in appropriate POWER DOOR LOCKS & TRUNK RELEASE article. If any DTC is present, go to DIAGNOSTIC TROUBLE CODE DEFINITIONS . Repair as necessary.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.