DAF CF65 Series Service Manual page 344

XE ENGINE, ENGINE BRAKE
Inspection and adjustment
3.2 FUNCTIONAL CHECK, DEB
Electrical inspection of DEB
1. Disconnect both DEB connectors at the
valve cover.
2. Check the solenoid valve for an open circuit
and for the correct resistance value using a
multimeter (set to the resistance value
position). See "Technical data".
3. Check whether the solenoid valve is short-
circuited to the vehicle's earth.
4. Connect a multimeter (set to the volt
measuring position) to the engine cable
harness.
5. Start the engine and, using the accelerator
pedal, increase the engine speed to approx.
1500 rpm.
Activate the engine brake using the engine brake
control switch on the cab floor. The multimeter
should display a voltage reading. See "Technical
data".
Note:
As the electronic UPEC unit checks the activation
of the engine brake, it will disengage the engine
brake below a certain engine speed (see UPEC
system manual).
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3-2
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CF65/75/85 series
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