Triumph Rocket 3 GT 2021 - Page 1364

1326
Engine ECM Communication (CAN)
Fault
Possible cause
Action
C1091
CAN fault - lost communication
with Engine ECM
Disconnect Keyless ECM and Engine
ECM connectors and proceed to
pinpoint test 1:
C1106
No Engine ECM immobiliser
communication
Pinpoint Tests
Test
Result
Action
1
Check cable and terminal integrity.
- Engine ECM pin C24
- Engine ECM pin C25
- Keyless ECM pin 13
- Keyless ECM pin 5
OK
Proceed to test 2
Faulty
Rectify fault, proceed to test 5
2
Check cable for short circuit:
- Engine ECM pin C24 to ground
- Engine ECM pin C25 to ground
OK
Proceed to test 3
Short circuit
Locate and rectify wiring fault,
proceed to test 5
3
Check cable for short circuit:
- Engine ECM pin C24 to Engine
ECM pin C25
OK
Proceed to test 4
Short circuit
Locate and rectify wiring fault,
proceed to test 5
4
Check cable continuity:
- Engine ECM pin C25 to Keyless
ECM pin 13
- Engine ECM pin C24 to Keyless
ECM pin 5
OK
Proceed to test 5
Open circuit
Locate and rectify wiring fault,
proceed to test 5
5
Reconnect harness, clear fault code
and run engine.
OK
Action complete – quit test
Fault still
present
Contact Triumph service