Triumph Rocket III Classic Service Manual page 344

Fuel System/Engine Management
EMS Main Relay Circuit - Rocket'" Touring
Fault Code Possible cause Action
P1685
EMS Main Relay circuit fault Note that the Starter Motor cannot be
powered if a Main Relay fault exists.
Ensure the EMS Main Relay connector
is secure. Proceed to pinpoint test 1:
Pinpoint Tests
Test Result Action
1 Ensure ignition has been switched off for OK
Proceed to test 2
greater than one minute. Identify EMS
Main Relay on the harness.
Check that relay operates when the ignition Faulty Disconnect ECM and proceed to test 4
is switched ON.
2 Check fuse box Fuse 6 integrity OK Disconnect ECM and proceed to test 4
(
Faulty Disconnect ECM and proceed to test 3
3 Check cable for short circuit: OK Replace Fuse 6 and proceed to test 4
- ECM pin A06 to ground Short circuit Locate and rectify wiring fault, replace Fuse 6
- EMS Main relay pin 1 to ground and proceed to test 7
4 Check cable and terminal integrity:
OK
Disconnect Main Relay and proceed to test 5
- ECM pin A06 Faulty Rectify fault, proceed to test 7
- ECM pin 815
- EMS Main Relay pin 1
- EMS Main Relay pin 4
- EMS Main Relay pin 6
- EMS Main Relay pin 8
5 Check cable for short circuit: OK
Disconnect instruments and proceed to test 6
- ECM pin 815 to ground Short circuit Locate and rectify wiring fault, proceed to test
7
6 Check cable continuity: OK
Replace EMS Main Relay and proceed to test
7
- ECM pin A06 to EMS Relay pin 8 Open circuit
Locate and rectify wiring fault, proceed to test
- ECM pin 815 to Relay pin 6
7
- EMS Main Relay pin 2 to Instruments pin
4
- EMS Main Relay pin 1 to Fuse box Fuse 6
7 Reconnect harness, clear fault code. Switch OK
Action complete - quit test
ignition off for longer than one minute.
Switch ignition on and check that the EMS
main relay operates. Start engine as final
check
Fault still present Contact Triumph service
11.140
Service Manual - Rocket 1111 Classic 1 Touring