Triumph Rocket III Classic Service Manual page 304

Fuel System/Engine Management
Fuel Pump Relay - Rocket III and Classic
Fault Code
Possible cause Action
P1231 Fuel pump relay open circuit, or short Check if pump runs briefly when
circuit to ground
P1232
Short circuit to battery+
Pinpoint Tests
Test
1 Check cable and terminal integrity:
- ECM pin 802
2 Check cable for short circuit:
- ECM pin 802 to earth
3 Check cable continuity:
- ECM pin 802 to fuel pump relay pin 4
- Fuel pump relay pin 6 to EMS relay
pin 8
4 Check cable for short circuit:
- ECM pin 802 to ECM pin A20
5 Reconnect harness, clear fault code and run
diagnostic tool function test to verify fault
cleared
Circuit Diagram
Fuse Box
fuse 6
EMS Relay
Result
OK
Faulty
OK
Short circuit
OK
Open circuit
OK
Short circuit
OK
Fault still present
fuel Pump Relay
ignition is switched on.
Ensure fuel pump relay connector is
secure.
Disconnect ECM and proceed to
pinpoint test 1:-
Disconnect fuel pump relay and
proceed to pinpoint test 4:-
Action
Disconnect fuel pump relay and proceed to
test 2
Rectify fault, proceed to test 5
Proceed to test 3
Locate and rectify wiring fault, proceed to test
5
Proceed to test 4
Locate and rectify wiring fault, proceed to test
5
Proceed to test 5
Locate and rectify wiring fault, proceed to test
5
Action complete - quit test
Contact Triumph service
ECM
11.100
Service Manual - Rocket III I Classic I Touring
(
(
(