LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chevrolet >> 2001 >> Impala LS >> Repair and Diagnosis >> Body & Frame >> Windows >> Power Window System >> Self-Diagnostic System >> Door System Diagnostic System Check
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Door System Diagnostic System Check

  1. Turn ignition switch to OFF position. Connect scan tool to Data Link Connector (DLC). DLC is located below left side of instrument panel, to right of steering column. Turn ignition switch to RUN position. If scan tool powers up, go to next step. If scan tool does not power up, see SCAN TOOL DOES NOT POWER UP under SYSTEM TESTS in BODY CONTROL MODULES - IMPALA & MONTE CARLO article.
  2. Using scan tool, attempt to establish scan tool communication with Body Control Module (BCM). If communication with BCM is established, go to next step. If communication with BCM is not established, see SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE under SYSTEM TESTS in BODY CONTROL MODULES - IMPALA & MONTE CARLO article.
  3. Using scan tool, select DISPLAY DTCS function for BCM. If scan tool displays any DTCs, go to next step. If scan tool does not display any DTCs, repair by symptom. See SYMPTOM INDEX  table under SYSTEM TESTS.
  4. If scan tool does not display any DTCs that begin with "U", go to next step. If scan tool displays any DTCs that begin with "U", see SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE under SYSTEM TESTS in BODY CONTROL MODULES - IMPALA & MONTE CARLO article.
  5. If scan tool does not display DTC B1000, go to next step. If scan tool displays DTC B1000, perform DTC B1000: ECU MALFUNCTION under DIAGNOSTIC TESTS in BODY CONTROL MODULES - IMPALA & MONTE CARLO article.
  6. If scan tool does not display DTCs B1339 or B1349, go to next step. If scan tool displays DTC B1339 or B1349, perform DTC B1339: DEVICE POWER NO. 3 CIRCUIT OPEN or DTC B1349: DEVICE GROUND NO. 1 (CHASSIS GROUND NO. 1) CIRCUIT OPEN under DIAGNOSTIC TESTS in BODY CONTROL MODULES - IMPALA & MONTE CARLO article.
  7. If scan tool displays any DTCs that begin with "P", perform appropriate test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS in BODY CONTROL MODULES - IMPALA & MONTE CARLO article. If scan tool does not display any DTCs that begin with "P", go to next step.
  8. If scan tool displays DTC B3069, B3127, B3128, B3132, B3133, B3137, B3138 or B3272, perform appropriate test. See POWER DOOR LOCKS - IMPALA & MONTE CARLO article. If scan tool does not display DTC B3069, B3127, B3128, B3132, B3133, B3137, B3138 or B3272, repair by symptom. See SYMPTOM INDEX  table under SYSTEM TESTS.
scientia non olet · About LEMON Manuals