Caterpillar Fault Code

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1250-9

Remote Control Comm: Abnormal Update

Variant 1

System

Electrical

Symptom

Remote Control Comm: Abnormal Update

Diagnosis & fix steps

LOGIC: Loss of CAN heartbeat from RC module. ACTION: Check CAT Data Link wiring and 120-ohm terminating resistors.

Red Seal field insights

This code triggers when the machine loses "eyes" on the remote interface; common on line-of-sight units.

Variant 2

System

Network

Symptom

Remote Control Inop / Lag

Diagnosis & fix steps

LOGIC: Remote Control Receiver Abnormal Update. ACTION: Check CAT Data Link wiring for 120 Ω resistance. Ensure receiver has unobstructed line-of-sight.

Red Seal field insights

Logic: ECM lost communication heartbeat with the receiver. Common on "Command for Excavation" builds.

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