Triumph Rocket III Classic Service Manual page 309

Fuel System/Engine Management
( Cooling Fan Relay - Rocket III Touring
(
Fault Code Possible cause Action
P1552 Fan relay open circuit, or short circuit View 8. note diagnostic tool 'sensor'
to ground
P1553 Short circuit to battery+
Pinpoint Tests
Test
1 Check cable and terminal integrity:
- ECM pin 830
2 Check cable for short circuit:
-ECM pin B30 to ground
3 Check cable continuity:
- Fan relay pin 4 to ECM pin B30
- Fan relay pin 6 to ECM pin 06
4 Check cable for short circuit:
- ECM pin B30 to ECM pin A06
5 Reconnect harness, clear fault code and run
diagnostic tool function test to visually verify
operation of cooling fan
Circuit Diagram
EMS Relay
Fuse Box
Fuse 6
Result
OK
Faulty
OK
Short circuit
OK
Open circuit
OK
Short circuit
OK
Fault still present
Cooling Fan Relay
data.
Ensure fan relay connector is secure.
Disconnect ECM and proceed to
pinpoint testl:-
Disconnect fan relay and proceed to
pinpoint test 4:-
Action
Disconnect fan 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
Setvice Manual - Rocket III / Classic / Touring
11.105