JCB Fault Code
Free · no signupU0100
No Crank / Dash "Lost Comm".
System
Electrical (CAN)
Symptom
No Crank / Dash "Lost Comm".
Diagnosis & fix steps
LOGIC: Lost Communication with ECM.
ACTION: Verify 24V power and ground at the ECM 96-pin connector. Inspect the main 30A engine fuse.
Red Seal field insights
Specs: CAN-Bus resistance should be 60 Ohms. RED SEAL FIX: Check the "Bulkhead Connector" near the battery box. Vibration often backs the center bolt out, causing intermittent data loss.
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