Scania TMS DTC 770 Rejected key update request

TMS Transmission Management System · Scania

Code 770 (decimal). Some diagnostic tools show it in hexadecimal as 0302.

In short

Validation of the immobiliser failed in the TMS control unit when the coordinator requested the TMS control unit to store a key.

Applies to: TMS4 (TMS)TMS5 (TMS)

What does Scania TMS fault code 770 mean?

What causes Scania DTC 770?

How does the system react?

How to fix Scania TMS fault code 770?

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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.

Code 770 in other Scania systems

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