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Cruise Control Diagnostic System Check

  1. Connect scan tool to Data Link Connector (DLC). DLC is located DLC is located below 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 switch to RUN position. Using scan tool, attempt to establish communication with Powertrain Control Module (PCM) and Body Control Module (BCM). If communication with PCM and BCM is established, go to next step. If communication with PCM or BCM is not established, go to TEST B: SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE under SYSTEM TESTS in BODY CONTROL MODULES - CORVETTE article.
  3. Using scan tool, select display DTC function for BCM and then PCM. Record all displayed DTCs, status of displayed DTCs, and module that set DTC. If any DTCs are displayed, go to next step. If no DTCs are displayed, repair cruise control by symptom. See SYMPTOM TESTS  .
  4. If any DTCs are displayed beginning 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 no "U" type DTCs are displayed, go to next step.
  5. If DTC B0605 is displayed, go to DTC B0605: BCM INTERNAL MEMORY MALFUNCTION under DIAGNOSTIC TESTS in BODY CONTROL MODULES - CORVETTE article. If DTC B0605 is not set, go to next step.
  6. If DTC P0562 or P0563 are displayed, perform appropriate test. See appropriate GENERATORS & REGULATOR article in STARTING & CHARGING SYSTEMS. If any other DTCs are displayed, perform appropriate test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS  .
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