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Powertrain Chart 1, Powertrain System Check

NOTE: Test numbers refer to numbers on diagnostic chart.
  1. Checks if system will enter diagnostics. If diagnostics cannot be entered or displays are blank, problem exists in IPC or related circuit. Diagnose system using SELF-DIAGNOSTIC SYSTEM CHECK chart.
  2. Checks to see if IPC is able to communicate with PCM. If IPC is unable to communicate with PCM, IPC Code I034 will set or NO PCM DATA message will be displayed when diagnostics are used.
  3. MIL should be on when vehicle is in diagnostic mode.
  4. Checks if powertrain system is operational.
  5. Checks if PCM codes are present.
  6. MIL should be off if diagnostic trouble codes are not present.
  7. Checks if known customer complaint is causing problem.
  8. If complaint is not in customer complaint list, perform system check applying to situation.
Fig 1: Powertrain Chart 1 Schematic, Powertrain System Check
G95G12837Courtesy of GENERAL MOTORS CORP.
Fig 2: Powertrain Chart 1 Diag. Flow Chart, Powertrain System Check
G95H12838Courtesy of GENERAL MOTORS CORP.
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