DTC-634

UnclassifiedGeneral

What This Code Means

Stored codes

Suggested Actions

  1. 1After operating the engine within the test parameters of DTC-634 check for any stored codes
  2. 2Connect any disconnected components, fuses, etc.
  3. 3If engine does not operate normally or has stored codes, go to OBD System Check
  4. 4If the engine does not operate normally or has stored codes, Go to OBD System Check
  5. 5If the engine operates normally with no stored codes, System OK
  6. 6Observe engine performance and driveability
  7. 7Observe the MIL
  8. 8Remove all test equipment except the DST
  9. 9Start the engine and operate the vehicle to full operating temperature
  10. 10Turn the ignition OFF and wait 30 seconds
  11. 11Using the DST clear DTC information from the ECM

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Get a diagnosis walkthrough for DTC-634 on your specific Power Solutions, Inc. unit — cited to the OEM manual, not a forum guess.

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