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Home >> Buick >> 2001 >> Regal LS >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Self-Diagnostics - 3.8L >> Diagnostic Tests >> DTC P1650: Output Driver Module Circuit No. 2 >> Diagnostic Procedures
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Diagnostic Procedures

  1. Perform powertrain diagnostic system check. See POWERTRAIN DIAGNOSTIC SYSTEM CHECK . After performing powertrain diagnostic system check, go to next step.
  2. If DTC P0560 is set, see DTC P0560: SYSTEM VOLTAGE . If DTC P0560 is not set, go to next step.
  3. Using scan tool, select OUTPUT DRIVER DATA list. Observe parameters on scan tool. If any parameters indicate a fault present, go to next step. If no parameters indicate a fault, go to step  5.
  4. Check for short to voltage on control circuit of component that indicated a fault. If problem was found, repair as necessary. After repairs, go to step  6. If problem was not found, go to next step.
  5. Replace PCM. Program replacement PCM. See POWERTRAIN CONTROL MODULE  under PROGRAMMING. After repairs, go to next step.
  6. Using scan tool, clear DTCs. Turn ignition off for 30 seconds. Start engine. Operate vehicle within code enable criteria. If DTC runs and passes, go to next step. If DTC does not run and pass, go to step  2.
  7. Using scan tool, observe stored information. If scan tool displays any DTCs that have not been diagnosed, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If scan tool does not display any DTCs, system is okay.
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