SPN 3645 — Transfer Case (TCI)

Safe to driveTo the nearest safe stop

J1939 code SPN 3645. Below — how the fault is worded at the factory by Mercedes-Benz, and what the second half of the code (FMI) means in the standard.

Mercedes-Benz

FMI 9

Transfer Case Information (TCI) Message is Missing

What FMI means in J1939

SPN 3645 FMI 93645/9 · 3645.9

abnormal update rate

Can I keep driving

Safe to drive. Below — how much time you have and what happens if you keep going.

What happens if you keep driving

Time you have: To the nearest safe stop

The gearbox or clutch has gone into limp mode: some gears may be unavailable and an automated box may stop shifting under load.

The main risk is being left on a climb with no gear and rolling back. Do not take a loaded truck into the hills; reaching level ground and a shop is fine.

Nearby: transmission

• SPN 3453Transmission Input Shaft PTO 2 Enable Switch
• SPN 3455Transfer Case Output Shaft PTO Enable Switch
• SPN 3456Transmission Input Shaft PTO 1 Engagement Enable
• SPN 3457Transmission Input Shaft PTO 2 Engagement Enable
• SPN 3461Transmission Input Shaft PTO 2 Engagement Status
• SPN 4043Transfer Case Front Output Shaft Actuator
• SPN 4044Transfer Case High Range Actuator
• SPN 4045Transfer Case Low Range Actuator
• SPN 4046Transfer Case Neutral Actuator
• SPN 4047Transfer Case Output Shaft PTO Actuator

Scanner threw several codes at once? Paste the whole list — we will show which one is the root cause and which ones simply followed.