SureTrack Community Fix: Shutter Down

Real Fixes from Mitchell 1’s SureTrack® expert information resource are documented issues from actual shop repair orders and community discussions. Read on to see how SureTrack can help you correct issues that are not easily diagnosed using OEM information alone. SureTrack is available at no additional cost in our ProDemand product.


You wouldn’t think a cooling system problem would cause a battery warning light to come on, would you? SureTrack community member carmansteve had a 2014 Ford Focus in the shop that had the battery light coming on but no apparent charging system issue. They posed the question to the community, and with the help of fellow community members, they were able to resolve the issue quickly.

The following Community Fix summarizes the interaction between members of the community that led to the solution.

Vehicle
2014 Ford Focus SE 2.0L

Title
Battery light on, replaced radiator shutter.

Complaint
Customer complains that battery light is on.

Diagnostic Steps Performed/Parts Replaced
When first started, everything is ok. After running for approximately 1 1/2 minutes, the battery light comes on. Vehicle, however is charging fine. I have had experiences of transmission shops doing work on these and not replacing the ground wires properly but checked and all seem to be in place. Found high resistance on the CAN bus.

Cause
Found bad shutter assembly in front of radiator causing high resistance in CAN bus system.

Correction
Replaced radiator shutter assembly, high CAN bus resistance gone and battery light no longer comes on.


SureTrack® adds to the power of ProDemand® with an exclusive combination of real-world knowledge and powerful diagnostic tools, all wrapped in an interactive community of professional technicians. Designed to help automotive shops increase accuracy and efficiency from diagnosis to completed repair, the industry’s most comprehensive repair information resource is just a few clicks away.

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About the Author

Nick Taylor

Nick Taylor is the SureTrack Community Administrator and a Senior Applications Specialist at Mitchell 1 with over 25 years of experience with electronic repair data systems. Nick previously worked in the automotive dismantling and engine rebuilding industries.