SureTrack Community Fix: Shutter Down

Real Fixes from the SureTrackĀ® 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 currently available free with the purchase of a current Snap-onĀ® diagnostic software version.

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.

2014 Ford Focus SE 2.0L

Battery light on, replaced radiator shutter.

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.

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

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

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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.