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To determine if a faulty electronic control module is causing excessive white smoke, perform the following: ‪

  1. Check for faulty electronic control module; refer to section .
  2. Check for faulty ECM repair; refer to section .
  3. Verify ECM repair; refer to section .

Test Engine with Repair to the Electronic Control Unit

Perform the following to determine if the ECM repair resolved excessive white smoke: ‪

  1. Start and run the engine.
  2. Run the engine at idle with a no-load for approximately 5 minutes, allowing the engine coolant to reach normal operating range.
  3. Visually inspect exhaust for excessive white smoke.
    1. If the engine exhaust emission appears normal, no further troubleshooting is required. Shut down the engine.
    2. If the engine exhaust emission is excessively white, shut down the engine. Call Detroit Diesel Technical Service Group.