MBE 4000 DDEC VI Troubleshooting – Section 11.1 Faulty MCM

Section 11.1
Faulty MCM

To determine if a faulty MCM is causing excessive white smoke, perform the following:‪

  1. Check for faulty MCM. Refer to "48 SPN 609 - MCM Fault (Erroneous Data)" .
  2. Replace the faulty MCM; refer to MBE 4000 Service Manual (6SE420), Chapter 2, “Fuel System”.
  3. Verify MCM replacement; refer to "11.1.1 Test the Engine with Replaced MCM" .

Section 11.1.1
Test the Engine with Replaced MCM

Perform the following to determine if the replaced MCM has resolved the excessive white smoke:‪



To avoid injury before starting and running the engine, ensure the vehicle is parked on a level surface, parking brake is set, and the wheels are blocked.‪

  1. Start and run the engine.
  2. Run the engine at idle with a no-load condition for approximately five minutes, allowing the engine coolant to reach normal operating range.
  3. Visually inspect the 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. Refer to "11.2 Faulty Turbocharger Boost Sensor" .

EPA07 MBE 4000 DDEC VI Troubleshooting Guide - 6SE568
Generated on 10-13-2008

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