Triumph Rocket III Classic Service Manual page 278

Fuel System/Engine Management
Idle Speed Control - Rocket III Touring
Fault Code Possible cause Action
POSOS ISC stepper motor / wiring fault View & note diagnostic tool 'freeze
frame' data if available.
View & note diagnostic tool 'sensor'
data.
Ensure sensor 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 A22 Faulty Rectify fault, proceed to test 7
- ECM pin A23
- ECM pin A20
- ECM pin A21
2 Check resistance value:
4Q to 12Q Disconnect stepper motor and proceed to test
3
- ECM pin A22 to ECM pin A23 Open circuit
Proceed to test 4
- ECM pin A20 to ECM pin A21
Short circuit Disconnect stepper motor and proceed to test
5
3 Check cable for short circuit: OK
Proceed to test 7
- ECM pin A22 to earth Short circuit Locate and rectify wiring fault, proceed to test
- ECM pin A23 to earth
7
- ECM pin A20 to earth
- ECM pin A21 to earth
4 Check cable continuity: OK Proceed to test 6
- ECM pin A22 to stepper motor pin A Open circuit Locate and rectify wiring fault, proceed to test
- ECM pin A23 to stepper motor pin A 1
7
- ECM pin A20 to stepper motor pin B
- ECM pin A21 to stepper motor pin B 1
5
Check cable for short circuit: OK Proceed to test 6
- ECM pin A20 to ECM pin A21 Short circuit
Locate and rectify wiring fault, proceed to test
- ECM pin A20 to ECM pin A22
7
- ECM pin A20 to ECM pin A23
- ECM pin A21 to ECM pin A22
- ECM pin A21 to ECM pin A23
- ECM pin A22 to ECM pin A23
6 Check stepper motor resistance:
4Q to 12Q
Proceed to test 7
- Motor pin A to motor pin A 1 Faulty Renew stepper motor, proceed to
- Motor pin B to motor pin B 1
test 7
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11.74
Service Manual - Rocket'" / Classic / Touring