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DTC P1554: Powertrain Control Module Detects Cruise Engaged Signal: Testing

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform the CRUISE CONTROL DIAGNOSTIC SYSTEM CHECK . Once this test has been performed, go to next step.
  2. Connect scan tool to the Data Link Connector (DLC). Turn on the ignition, with the engine off. With scan tool, monitor the DTC information for DTC P1585 in the Powertrain Control Module (PCM). If DTC P1585 also sets, go to DTC P1585 . If DTC P1585 does not set, go to next step.
  3. With scan tool, observe the CRUISE CONTROL ACTIVE display. If the CRUISE CONTROL ACTIVE display indicates yes, go to step  5. If not, go to next step.
  4. Review and record the scan tool fail records information. Operate the vehicle with the fail records condition. Using the scan tool, monitor the specific DTC information for DTC P1554 until the test runs. If the scan tool indicate that DTC P1554 failed this ignition, go to next step. If not, go to Diagnostic Aids .
  5. Turn off the ignition. Disconnect the cruise control module connector. Turn on the ignition switch, with the engine off. Using the scan tool, observe the CRUISE CONTROL ACTIVE display. If the CRUISE CONTROL ACTIVE display indicates yes, go to next step. If not, go to step  7.
  6. Turn off the ignition. Disconnect the appropriate PCM connector. Test the cruise control engaged circuit for a short to ground. If you found and corrected the condition, go to step  9. If not, go to step  8.
  7. Replace the cruise control module. See CRUISE CONTROL MODULE  under REMOVAL & INSTALLATION. When you complete the replacement, go to step 9.
  8. Replace the PCM. See REMOVAL, OVERHAUL & INSTALLATION - AURORA article in ENGINE PERFORMANCE. Program the PCM. See POWERTRAIN CONTROL MODULE  under PROGRAMMING. When you complete the replacement, go to next step.
  9. Use the scan tool in order to clear the DTC(s). Operate the vehicle within the conditions for running the DTC as specified in the supporting text. If the DTC resets, go to step  2. If not, system is OK.
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