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HOMESERVICE MANUALSCHEVROLET2002IMPALA LSREPAIR AND DIAGNOSIS (SINGLE PAGE)ELECTRICALGAUGESANALOG INSTRUMENT PANELSSELF-DIAGNOSTIC SYSTEMAUDIBLE WARNINGS SYSTEM DIAGNOSTIC SYSTEM CHECK
2002 Chevrolet Impala LS

Audible Warnings System Diagnostic System Check

2002 Chevrolet Impala LSSECTION Audible Warnings System Diagnostic System Check
NOTE: Use this check as starting point for any audible warnings system complaint.
  1. Connect scan tool to Data Link Connector (DLC). If scan tool powers up, go to next step. If scan tool does not power up, go to SCAN TOOL DOES NOT POWER UP under SYSTEM TESTS in BODY CONTROL MODULES - IMPALA & MONTE CARLO article.
  2. Turn ignition switch to RUN position. Using scan tool, attempt to establish communications with following modules:
    • Body Control Module (BCM)
    • Powertrain Control Module (PCM)
    • Electronic Brake Control Module (EBCM)
    • Inflatable Restraint & Sensing Diagnostic Module (SDM)
    • Radio
    If communication is established with all modules, go to next step. If communication cannot be established any module, go to SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE under SYSTEM TESTS in BODY CONTROL MODULES - IMPALA & MONTE CARLO article.
  3. Select scan tool display DTCs function for following control modules:
    • Body Control Module (BCM)
    • Powertrain Control Module (PCM)
    • Electronic Brake Control Module (EBCM)
    • Inflatable Restraint Sensing & Diagnostic Module (SDM)
    If scan tool displays any DTCs, go to next step. If scan tool does not display any DTCs, perform appropriate procedure. See SYMPTOM INDEX  table under SYSTEM TESTS.
  4. Using scan tool, retrieve DTCs. If DTCs U1000-U1305 are not present, go to next step. If DTCs U1000-U1305 are present, go to SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE under SYSTEM TESTS in BODY CONTROL MODULES - IMPALA & MONTE CARLO article.
  5. Check for DTCs B1000, B1007, B1009, B1339, B1349 or B1440. If DTCs are not present, go to next step. If any DTC is present, perform appropriate test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS under SELF-DIAGNOSTICS in BODY CONTROL MODULES - IMPALA & MONTE CARLO article.
  6. Check for DTCs B1482, B1483, B1507, B1508, P0560 or P0620. If DTCs are not present, test is complete. If any DTC is present, go to DIAGNOSTIC TROUBLE CODE DEFINITIONS  .
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.