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Toyota
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2004
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Highlander Limited, FWD
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Repair and Diagnosis
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Different car
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Section 888 (Automatic Transmission)
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DTC/Circuit Diagnosis
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DTC U0100: Lost Communication (ECM A)
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Possible Cause
Possible Cause
WARNING:
This page is about a different car, the 2013 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.
ECM
Harness or connectors (CAN communication line is open or shorted.)