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Home >> Oldsmobile >> 2000 >> Intrigue GL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P1571: Traction Control Torque Request Circuit >> Diagnostic Procedures

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. Turn ignition on, with engine off. Using scan tool, record FAILURE RECORDS and DTC INFO. Clear DTCs. Start and operate engine at idle. Check for stored DTCs. If this DTC failed this ignition cycle, go to next step. If this DTC did not fail in this ignition cycle, fault is not present. See DIAGNOSTIC AIDS .
  3. Turn ignition off. Disconnect EBTCM harness connector. Start engine. Using a DVOM set to Hertz scale, connect DVOM between engine ground and EBTCM desired torque PWM circuit at harness connector. If DVOM reads 128 Hz, go to next step. If DVOM does not read 128 Hz, go to step  5.
  4. Check for poor connections or terminal contact at EBTCM. Repair as necessary. After repairs, go to step  8. If connections or terminal contact are okay, fault is in EBTCM system. Diagnose EBTCM.
  5. Turn ignition off. Disconnect PCM harness connector. Turn ignition on. Check desired torque PWM circuit for open, short to ground or short to voltage. Repair as necessary. After repairs, go to step  8. If circuit is okay, go to next step.
  6. Check for poor connection at EBTCM. Repair as necessary. After repairs, go to step  8. If connection is okay, go to next step.
  7. Replace PCM. Program replacement PCM using required equipment. After replacing PCM, go to next step.
  8. Using scan tool, clear DTCs. Turn ignition on. Wait 15 seconds then operate vehicle within conditions for setting this DTC. If scan tool indicates that this test ran and passed, go to next step. If scan tool does not indicate that this test ran and passed, return to step  2.
  9. Using scan tool, select CAPTURED INFO feature. If any undiagnosed DTCs are displayed, go to applicable DTC test.
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