Scania TMS DTC 1521 Position sensor for the 2nd gear and crawl gear coupling sleeve, fault in the voltage supply

TMS Transmission Management System · Scania

Code 1521 (decimal). Some diagnostic tools show it in hexadecimal as 05F1.

In short

The supply voltage is outside the approved range.

Applies to: TMS3 (TMS)

What does Scania TMS fault code 1521 mean?

What causes Scania DTC 1521?

How does the system react?

How to fix Scania TMS fault code 1521?

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This information is for guidance only. Always follow the manufacturer workshop manual and safety procedures; if in doubt, contact an authorised workshop.