Variant 1
Applies to: TMS2 (TMS)TMSe2 (TMS)
What does Scania TMS fault code 21022 mean?
Data missing from BMS.
What causes Scania DTC 21022?
There is no information from BMS as to whether the ABS system is working correctly.
How does the system react?
Braking is only allowed using the hand lever. The retarder will not disengage when the accelerator pedal is depressed. The retarder is disengaged only when the hand lever is returned to its top position.
How to fix Scania TMS fault code 21022?
Examine the brake system.
Variant 2
Applies to: TMS1
Detection
Data missing from BMS.
Possible cause
There is no information from BMS as to whether the ABS system is working correctly.
System reaction
Braking is only allowed using the hand lever. The retarder will not disengage when the accelerator pedal is depressed. The retarder is disengaged only when the hand lever is returned to its top position.
How to fix
Examine the brake system.
This information is for guidance only. Always follow the manufacturer workshop manual and safety procedures; if in doubt, contact an authorised workshop.