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N14 Base Engine Troubleshooting and Repair Manual – Engine Brake — One or More Cylinders Braking with Power Switch Off (PT)

Symptom Tree  t038-011

This is symptom tree t038-011
Cause Correction

Engine brake on/off switch or circuit is malfunctioning

Check the engine brake on/off switch and circuit. Refer to Procedure 019-035 in the Troubleshooting and Repair Manual, CELECT™
Plus Systems, Bulletin 3666130, or the Troubleshooting and Repair Manual, CELECT™ Systems, Bulletin 3666084.
 

Clutch switch is malfunctioning

Check the clutch switch adjustment and the clutch switch circuit. Refer to the OEM service manual.
 

Engine brake throttle switch is malfunctioning

Check the engine brake throttle switch (fuel pump switch). the OEM service manual
 

Service brake pressure switch or circuit is malfunctioning

Check the service brake pressure switch and circuit. Refer to the OEM service manual.
 

Engine brake adjustment is not correct

Adjust the engine brakes. Refer to Procedure 020-001.
 

Solenoid valve o-ring seals are leaking

Remove the solenoid valve and inspect the top and bottom o-rings. Replace the o-rings if necessary. Procedure 020-001

 

Solenoid valve is malfunctioning

Check for voltage at the solenoid valve. Procedure 020-001

 

Inner control valve spring is broken or the control valve is stuck in the on position

Inspect the inner control valve springs and the control valve. Refer to the Troubleshooting and Repair Manual, C-Brake , Bulletin 3810473. Replace the springs or control valve as necessary.
 
Last Modified:  05-Jan-2004
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