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Audible Warnings Diagnostic System Check

  1. Connect scan tool to DLC located under steering column. 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 off. Connect scan tool. Turn ignition on. Attempt to establish communication with Body Control Module (BCM) and Instrument Panel Cluster (IPC). If scan tool communicates with these modules, go to next step. If scan tool does not communicate with these modules, go to TEST B: SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE under SYSTEM TESTS in BODY CONTROL MODULES - CORVETTE article.
  3. Select DISPLAY DTC function on scan tool for modules listed in previous step. If any DTCs are displayed, go to next step. If no DTCs are displayed, diagnose by symptom. See SYMPTOM INDEX  table under SYSTEM TESTS.
  4. If scan tool displays any DTCs that begin with "U", go to TEST B: SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE under SYSTEM TESTS in BODY CONTROL MODULES - CORVETTE article. If scan tool does not display any DTCs that begin with "U", go to next step.
  5. If scan tool displays DTC B0605 or B1000, go to SELF-DIAGNOSTIC SYSTEM in BODY CONTROL MODULES - CORVETTE article. If scan tool does not display DTCB0605 or B1000, go to next step.
  6. If scan tool displays DTC B0846, B0851, B2282, B2283, B2284, B2285, P0562, P0563, P1637, or P1638, go to SELF-DIAGNOSTIC SYSTEM in appropriate GENERATORS & REGULATORS article. If scan tool does not display DTC B0846, B0851, B2282, B2283, B2284, B2285, P0562, P0563, P1637, or P1638, go to DIAGNOSTIC TROUBLE CODE DEFINITIONS  .
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