Triumph Rocket III Classic Service Manual page 348

Fuel System/Engine Management
Tune Lock - Rocket III Touring
Fault Code
Possible cause Action
P1602 ECM is locked to prevent the This is also identified by a fast flashing
motorcycle from being operated MIL indication, and a disabled engine
management system. Unlock the
ECM using the service tool and
supplied unlock code from Triumph
service.
(
11.144
SelVice Manual - Rocket Ill/Classic / Touting