Front Wheel Sensor Abnormal Input/Losing Contact; Pinpoint Tests - Triumph Thunderbird Service Manual

Front Wheel Sensor Abnormal Input/Losing Contact
Fault Code Possible cause Action
C1612 Front wheel speed sensor poor signal Ensure ABS ECM connector is secure.
Incorrect Wheel speed sensor air gap Ensure wheel speed sensor connector
Damaged or dirty pulser ring
is secure.
Loose or incorrectly installed wheel Proceed to pinpoint test 1:
speed sensor
Pinpoint Tests
Test Result Action
1 Measure the air gap of the front wheel
OK
Proceed to test 2
speed sensor between the sensor and the
pulser ring:
- Air gap between 0.1 mm to 1.5 mm Faulty
Rectify the fault and proceed to test 5
2 Check the pulser ring for damage or
OK
Proceed to test 3
contamination by road grime or ferrous
metal filings
Faulty Clean or replace the ABS pulser ring, proceed
to test 5
3 Check the wheel speed sensors for correct
OK
Proceed to test 4
installation, and the fixings for correct
torque
Faulty Rectify the fault and proceed to test 5
4 Check the wheel speed sensor circuit (see
OK
Contact Triumph service
page
12.52)
Faulty Rectify the fault and proceed to test 5
5 Clear fault code and test ABS to verify fault
OK
Action complete - quit test
cleared
Fault still present Contact Triumph service
12.54
SelVice Manual - Thunderbird