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Home >> Oldsmobile >> 2000 >> Intrigue GL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P1554: Cruise Control Feedback Circuit >> Diagnostic Procedures
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Diagnostic Procedures

  1. Perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK . After performing OBD system check, go to next step.
  2. Check if DTC P1585 is also set. If DTC P1585 is set, diagnose DTC P1585 first. If DTC P1585 is not set, go to next step.
  3. Turn ignition off. Disconnect cruise control module. Turn ignition on. Using a DVOM, check cruise control engaged circuit at cruise control module harness connector and ground. If DVOM reads 12 volts, go to next step. If DVOM does not read 12 volts, go to step  5.
  4. Turn ignition off. Reconnect cruise control module harness connector. Disconnect PCM harness connector. Turn ignition on. Using a test light connected to battery voltage, probe cruise engaged status circuit at PCM harness connector. If test light illuminates, go to step  6. If test light does not illuminate, go to step  7.
  5. Check cruise engaged circuit for open or short ground. Repair as necessary. After repairs, go to step  8. If circuit is okay, go to step  7.
  6. Replace cruise control module. After replacing cruise control module, go to step  9.
  7. Replace PCM. Program replacement PCM using required equipment. After replacing PCM, go to step  9.
  8. Locate and repair short to ground in cruise engaged circuit. After repairs, go to next step.
  9. Clear DTC P1554. Start engine and observe DTCs. If DTC P1554 resets, repeat step  2. If DTC P1554 is not set, system is okay.
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