Faulty Turbocharger Control Unit
To determine if an improper turbocharger control unit is causing excessive white smoke, inspect the turbocharger control unit for a leaking diaphragm, refer to MBE 4000 Service Manual (6SE420) , Chapter 6, Air Intake System.
- If the control unit diaphragm is leaking replace the turbocharger; refer to MBE 4000 Service Manual (6SE420), Chapter 6, “Air Intake System — Turbocharger”.
- Verify the replacement of the turbocharger and unit control corrected the excessive white smoke condition; refer to "11.7.1 Test Engine with Replaced Turbocharger and Control Unit" .
Test Engine with Replaced Turbocharger and Control Unit
Perform the following to determine if replacing the turbocharger and control unit corrected the excessive white smoke condition:
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.
- Start the engine.
- Run the engine speed to full load.
- Visually inspect the exhaust for excessive white smoke.
- If the engine exhaust emission appears normal, no further troubleshooting is required. Shut down the engine.
- If the engine exhaust emission is excessive, shut down the engine, check for a restricted or cracked charge air cooler. Refer to "11.8 Restricted or Cracked Charge Air Cooler" .
|EPA07 MBE 4000 DDEC VI Troubleshooting Guide - 6SE568|
|Generated on 10-13-2008|