Triumph Rocket III Classic Service Manual page 332

Fuel System/Engine Management
Vehicle Speed Sensor - Rocket III and Classic
Fault Code Possible cause
P0500
Vehicle speed sensor circuit fault
Pinpoint Tests
Test Result
1 Check cable and terminal integrity: OK
- ECM pin A21 Faulty
- Instrument pin 18
2 Check cable for short circuit: OK
- ECM pin A21 to ground Faulty
- ECM pin A21 to ECM pin AOl
- ECM pin A21 to battery
3 Check cable for continuity: OK
- ECM pin A21 to sensor pin 3 Open circuit
- Sensor pin 2 to ground
- Instruments pin 18 to sensor pin 1
4 Reconnect harness, clear fault code and run OK
engine.
Fault still present
Circuit Diagram
Alarm EngineStop
Control Unit Switch
~
Action
View
&
note "freeze frame" data if
available.
View
&
note "sensor" data
Ensure sensor connector is secure.
Disconnect ECM and proceed to
pinpointtest 1:-
Action
Disconnect ambient pressure sensor and
proceed to test 2
Rectify fault, proceed to test 4
Proceed to test 3
Locate and rectify wiring fault, proceed to test
4
Renew vehicle speed sensor and proceed to
test 4
Locate and rectify wiring fault, proceed to test
4
Action complete, quit test
Contact Triumph service
Fuse Box
FuseS
Instruments
J~
LGN
il-GR
lj-SY
G
c:::::::J
11.128
Road Speed
Sensor
ECM
Setvice Manual - Rocket Ill/ Classic / Touring
(