Abnormal Ecu; Pinpoint Tests - Triumph Thunderbird Service Manual

Abnormal ECU
Fault Code Possible cause Action
C1681 Incorrect Wheel speed sensor air gap Ensure ASS ECM connector is secure.
Damaged or dirty pulser ring Proceed to pinpoint test 1:
Loose or incorrectly installed wheel
speed sensor
Pinpoint Tests
Test Result Action
1 Measure the air gap of the wheel speed OK
Proceed to test 1
sensors between the sensor and the pulser
ring:
- Air gap between 0 mm to 1.5 mm Faulty
Rectify the fault and proceed to test 4
2 Check the pulser rings for damage or OK Proceed to test 2
contamination by road grime or ferrous
metal filings
Faulty Clean or replace the ASS pulser ring, proceed
to test 4
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 4
4 Clear fault code and test ASS to verify fault OK
Action complete - quit test
cleared.
Fault still present
Contact Triumph service
SelVice Manual - Thunderbird
12.65