C2777-20 abs/AT light constant problem solved | Ford Explorer Forums

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C2777-20 abs/AT light constant problem solved

Bazz270

Explorer Addict
Joined
April 14, 2020
Messages
1,040
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371
City, State
Haifa,Israel
Year, Model & Trim Level
Ford Explorer 2007 XLT
Hi all

Just solved the problem.

The Following dtc (and many others related to the sensor cluster function) means no connection thru sensor cluster data bus.IVD calibration (RSC relearn) cannot be performed until problem solved.Both forscan and dealer tool not worked for me.

1.Go forscan and check for zeros (vehicle on level groun)in acceleration sensor cluster PIDs.
2.check for zero resistance from the cluster to abs main connector
3.disconnect and clean ALL the abs related connectors from oxidation and galvanic corrosion products.i mean ALL including the wheel sensor,abs module, and the interior connectors.
4.secure data connectors(especially the ones with broken lock latches) to the vehicle body.no connector allowed to vibrate!
5. Perform IVD calibration on level ground,doors.closed.
6.Problem solved.

No need for sensor cluster or abs module replace!

Good luck
 






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