What does John Deere fault code 639.13 mean?

Q: What does John Deere fault code 639.13 mean?

639.13 indicates: Dash display goes "blank" or shows "No Comm"; Machine may stay at idle. Fix: CAN Bus J1939 Data Link Error. LOGIC: The ECU and ICU (Monitor) have lost communication with each other. ACTION: 1. Check for 60 ohms between CAN High and CAN Low. 2. Inspect the "Terminating Resistor." 3. Check the harness at the cab-to-frame bulkhead. FIX: Repair broken CAN bus wires; replace failed Terminating Resistor.

John Deere Fault Code

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639.13

Dash display goes "blank" or shows "No Comm"; Machine may stay at idle.

System

ECU

Symptom

Dash display goes "blank" or shows "No Comm"; Machine may stay at idle.

Diagnosis & fix steps

CAN Bus J1939 Data Link Error. LOGIC: The ECU and ICU (Monitor) have lost communication with each other. ACTION: 1. Check for 60 ohms between CAN High and CAN Low. 2. Inspect the "Terminating Resistor." 3. Check the harness at the cab-to-frame bulkhead. FIX: Repair broken CAN bus wires; replace failed Terminating Resistor.

Red Seal field insights

Check the battery terminals first! Low voltage or a loose ground can "crash" the CAN bus and make it look like a controller has died when it's just a bad connection.

Same code keeps coming back?

That's a program problem, not a part problem. Book a 30-minute uptime review with Grant, a Red Seal Heavy Duty Technician.

Book an uptime review

Read before you touch anything

This is general reference information, not a repair manual. It is for trained, qualified technicians.
Fault codes, meanings and procedures vary by model, serial number and software version. Confirm the code and the procedure against the manufacturer's service manual before acting.
Follow the OEM service manual, torque specs and your site's safety procedures: lockout/tagout, block raised equipment, relieve hydraulic, fuel and air pressure, and let hot systems cool.
You use this information at your own risk. Adventure Mechanical and AM Fleet Integrity accept no liability for damage, injury, downtime or loss arising from its use.
Not affiliated with or endorsed by any manufacturer. Brand names are used only to identify the equipment a code applies to.

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