Cooling System - Cooling Fan Runs With Engine Off

1909-01





Affected Vehicles

Condition
19 09 01 Jan. 8, 2009 2019550 Supersedes T. B. Group 19 number 08-01 dated Dec.8, 2009 due to incorrect publication date.

Cooling Fan Continues to Run after Switching Engine OFF
After switching OFF engine (ignition off), cooling fan sporadically continues to run. Customer may notice an odor from the engine compartment along with this condition

NOTE: The condition as described is normal. DO NOT replace cooling system components for this condition. Parts replaced for this condition will be debited.

Technical Background
Engine compartment warms up because of the diesel particulate filter regeneration.

Production Solution
No Production change required.

Service
The after-running of the cooling fan is deliberate and can last up to 10 minutes after switching engine OFF.
The after-running prevents high engine compartment temperatures due to diesel particulate filter regeneration.
The cooling fan can continue to run even after driving less than 2 miles (3.2 Km).
When restarting the engine the cooling fan operates normally.

Warranty
Information only.

Required Parts and Tools
No Special Parts required.
No Special Tools required.

Additional Information
All part and service references provided in this Technical Bulletin are subject to change and/or removal. Always check with your Parts Dept. and Repair Manuals for the latest information.