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Lighting Systems Diagnostic System Check

  1. Connect scan tool to Data Link Connector (DLC) located under left side of instrument panel. If scan tool powers up, go to next step. If scan tool does not power up, go to TEST A: SCAN TOOL DOES NOT POWER UP under SYSTEM TESTS in BODY CONTROL MODULES - CORVETTE article.
  2. Turn ignition on. Attempt to communicate with Body Control Module (BCM) and Powertrain Control Module (PCM). If scan tool communicates with BCM and PCM, go to next step. If scan tool does not communicate with BCM and PCM, go to TEST B: SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE under SYSTEM TESTS in BODY CONTROL MODULES - CORVETTE article.
  3. Display BCM and PCM DTCs on scan tool. If any DTCs are set, go to next step. If no DTCs are set and headlight doors are inoperative, go to HEADLIGHT DOORS INOPERATIVE  under SYSTEM TESTS.
  4. Using scan tool, check for any DTCs that begin with "U" (communication DTCs) stored in BCM. If no communication DTCs exist in BCM or PCM, go to next step. If any communication DTCs exists, go to TEST B: SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE under SYSTEM TESTS in BODY CONTROL MODULES - CORVETTE article.
  5. If scan tool displays DTC B0605, go to , go to DTC B0605: BCM INTERNAL MEMORY MALFUNCTION under DIAGNOSTIC TESTS in BODY CONTROL MODULES - CORVETTE article. If scan tool does not display DTC B0605, go to next step.
  6. If scan tool displays DTC P0562 or P0563, perform appropriate test. See GENERATORS & REGULATORS - CORVETTE article in STARTING & CHARGING SYSTEM. If scan tool does not display DTC P0562 or P0563, go to appropriate DTC diagnostic and repair procedure for appropriate system that DTC is set in. See BODY CONTROL MODULES - CORVETTE article.
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