Cooling System - Cooling Fans Run With Ignition Off
19 12 01April 20, 2012
2022549 Supersedes T.B. V191101 dated September 8, 2011 update model applicability.
Vehicle Information
Condition
Electric Coolant Fans Continue to Run after Ignition is Switched OFF
Note:
Customer concerns of "electric coolant fans continue to run after ignition is switched off" are resulting in unnecessary coolant fan replacements.
Technical Background
It is considered normal operation for the electric coolant fans to continue to run for up to 15 minutes after the ignition is switched off in gasoline engine applications, and up to 16 minutes in diesel engine applications.
Production Solution
No production change required.
Service
Procedure:
^ Verify the period of time the electric coolant fans continue to run after the vehicle ignition is switched off.
If the period verified is less than 15 minutes in gasoline engine applications, or less than 16 minutes in diesel engine applications, this is considered normal operation and the customer should be notified as such.
If the period verified is more than 15 minutes in gasoline engine applications, or more than 16 minutes in diesel engine applications, continue with diagnosis using GFF.
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.