Triumph Rocket 3 GT 2021 - Page 1085

1047
Front Wheel Pulser Ring Missing Teeth
Fault
Code
Possible cause
Action
C1621
Incorrect wheel speed sensor air gap
Front wheel pulser ring missing teeth
Damaged or dirty pulser ring
Loose or incorrectly installed wheel
speed sensor
Damaged/incorrect wheels
Make sure ABS modulator/ECM
connector is secure.
Proceed to pinpoint test 1:
Pinpoint Tests
Test
Result
Action
1
Measure the air gap of the front wheel speed
sensor between the sensor and the pulser ring:
- Air gap between 0.37 mm and
1.23 mm
OK
Proceed to test 2
Faulty
Rectify the fault and
proceed to test 5
2
Check the pulser ring for damage or
contamination by road grime or ferrous metal
filings
OK
Proceed to test 3
Faulty
Clean or replace the
ABS pulser ring,
procced to test 5
3
Check the wheel speed sensors for correct
installation, and the fixings for correct torque
OK
Proceed to test 4
Faulty
Rectify the fault,
proceed to test 5
4
Check the motorcycle wheel for
damage/incorrect size.
OK
Proceed to test 5
Faulty
Rectify the fault,
proceed to test 5
5
Clear fault code and test ABS to verify fault
cleared.
OK
Action complete -
quit test
Fault
still
present
Contact Triumph
service