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DTC B1658: EEPROM Checksum Error: Testing

  1. If body control system diagnostic system check has been performed, go to next step. If body control system diagnostic system check has not been performed, go to BODY CONTROL SYSTEM DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.
  2. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, read DTCs. If DTC B1658 is set as current, go to next step. If DTC B1658 is not set as current, problem may be intermittent. Go to DIAGNOSTIC AIDS  .
  3. Replace module setting DTC. See appropriate procedure under REMOVAL & INSTALLATION  . After replacement, go to next step.
  4. Use scan tool to clear DTCs. Operate vehicle and recheck for DTCs. If DTC B1658 resets, go to step  2 . If DTC does not reset, system is okay at this time.
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