Triumph Rocket III Service Manual page 216

Fuel System/Engine Management
Idle Speed Conrol
Fault Code Possible cause Action
P0505 ISC stepper motor
I
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 B23 Faulty Rectify fault, proceed to test 7
- ECM pin B07
- ECM pin B11
- ECM pin B03
2 Check resistance value:
40 to 120 Disconnect stepper motor and proceed to
test 3
- ECM pin B23 to ECM pin B07
Open circuit Proceed to test 4
- ECM pin B11 to ECM pin B03
Short circuit
Disconnect stepper motor and proceed to
test 5
3 Check cable for short circuit: OK Proceed to test 7
- ECM pin B23 to earth
Short circuit Locate and rectify wiring fault, proceed to
- ECM pin B07 to earth
test 7
- ECM pin B11 to earth
- ECM pin B03 to earth
4 Check cable continuity:
OK Proceed to test 6
- ECM pin B23 to stepper motor pin A Open circuit
Locate and rectify wiring fault, proceed to
- ECM pin B07 to stepper motor pin A 1
test 7
- ECM pin B11 to stepper motor pin B
- ECM pin B03 to stepper motor pin B1
5 Check cable for short circuit: OK Proceed to test 6
- ECM pin B23 to ECM pin B07 Short circuit Locate and rectify wiring fault, proceed to
- ECM pin B11 to ECM pin B03
test 7
6 Check stepper motor resistance:
40 to 120 Proceed to test 7
- Motor pin A to motor pin A 1 Faulty Renew stepper motor, proceed to
- Motor pin B to motor pin B1 test 7
7 Reconnect harness, clear fault code and OK Action complete - quit test
run diagnostic tool function test to
visually verify operation of stepper motor
Fault Contact Triumph service
11.62
Service Manual - Rocket III