Triumph Rocket III Service Manual page 250

Fuel System/Engine Management
Fuel Level Gauge
Fault Code Possible cause Action
PD656 Accessory fuel level gauge circuit Ensure fuel level gauge connector
fault is secure.
Disconnect ECM and proceed to
pinpoint test1:
Pinpoint Tests
Test
Result Action
1 Check cabie and terminal integrity:
OK Disconnect gauge and proceed to test 2
- ECM pin ADS Faulty Rectify fault, proceed to test 4
- Gauge pin 1
2 Check cable for short circuit:
OK Proceed to test 3
• ECM pin ADS to ground Short circuit Locate and rectify wiring fault, proceed to
- ECM pin ADS to ECM pin A2D
test 4
3 Check cable continuity: OK Renew gauge and proceed to test 4
- ECM pin ADS to gauge pin 1 Open circuit Locate and rectify wiring fault, proceed to
- Gauge pin 2 to earth
test 4
- Gauge pin 3 to alarm controi unit pin 1
4 Reconnect harness, clear fault code.
OK Action complete, quit test
Fault still present Contact Triumph service
Circuit Diagram
Alarm
Kill
Control Unit
Switch
~
Access0J'
Fuel Leve
Fuse Box
Gauge
~ ~
Fuse 5
G R J
LGN G c==J
ECM
BG A08
'1 f:
A06
BOB
B09
11.96
Service
Manual -
Rocket
III