Triumph Rocket III Classic Service Manual page 328

Fuel System/Engine Management
2nd Throttle Actuator - Rocket III and Classic
Fault Code Possible cause Action
P0638 2nd throttle actuator motor I wiring View 8. note "freeze frame" data if
fault available.
View 8. note "sensor" data
Ensure actuator connector is secure.
Disconnect ECM and proceed to
pinpoint test 1:-
Pinpoint Tests
Test Result Action
1 Check cable and terminal integrity: OK Proceed to test 2
- ECM pin B21 Faulty Rectify fault, proceed to test 7
- ECM pin B22 (
- ECM pin B12
- ECM pin B04
2 Check resistance value:
4Q to lOQ Disconnect actuator and proceed to test 3
- ECM pin B21 to ECM pin B22 Open circuit Proceed to test 4
- ECM pin B12 to ECM pin B04
Short circuit
Disconnect actuator and proceed to test 5
3 Check cable continuity: OK
Proceed to test 7
- ECM pin B21 to ground Short circuit Locate and rectify wiring fault, proceed to test
- ECM pin B22 to ground
7
- ECM pin B12 to ground
- ECM pin B04 to ground
4 Check cable continuity: OK Proceed to test 6
- ECM pin B21 to actuator pin A
- ECM pin B22 to actuator pin A Open circuit
Locate and rectify wiring fault, proceed to test
- ECM pin B 12 to actuator pin B
7
(
- ECM pin B04 to actuator pin B
5 Check cable for short circuit: OK Proceed to test 6
- ECM pin B21 to ECM pin B22
Short circuit
Locate and rectify wiring fault, proceed to test
- ECM pin B 12 to ECM pin B04
7
6 Check actuator resistance: 4Q to 10Q Proceed to test 7
- Sensor pin A to sensor pin A
- Sensor pin B to sensor pin B
renew actuator and proceed to test 7
7 Reconnect harness, clear fault code. OK Action complete, quit test
Run diagnostic tool function test to visually
verify operation of actuator
Fault still present Contact Triumph service
11,124
Service Manual - Rocket III / Classic / Touring