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DTC B1004: Control Module Keep Alive Memory Malfunction: Testing

  1. Perform appropriate diagnostic system check for system in which customer concern is apparent. See DIAGNOSTIC SYSTEM CHECK  table under SELF-DIAGNOSTIC SYSTEM. After performing diagnostic system check, go to next step.
  2. Turn ignition switch to LOCK position. Connect scan tool to Data Link Connector (DLC). DLC is located below left side of instrument panel, to right of steering column. See Figure . Turn ignition switch to RUN position, with engine off. Using scan tool, retrieve DTCs. If DTC B1004 is retrieved as current, go to next step. If DTC B1000 is not retrieved as current, see DIAGNOSTIC AIDS  .
  3. Replace suspect control module. See appropriate removal and installation procedure for module being replaced under REMOVAL & INSTALLATION  . After repair, go to next step.
  4. Using scan tool, clear DTCs. Operate vehicle within CODE ENABLE CRITERIA  conditions. Retrieve DTCs. If DTC resets, go to step  2 . If DTC does not reset, system is okay.
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