P1685

Main relay circuit malfunction

Note that the starter motor cannot be powered if a main relay fault exists. Make sure the EMS main relay connector is secure.

Proceed to pinpoint test 1:

1

Ensure ignition has been switched off for greater than 90 seconds. Identify EMS main relay on the harness.

Check that relay operates when the ignition is switched ON and the stop and run switch is in the RUN position.

OK

Proceed to test 4

Faulty

Disconnect EMS main relay and engine ECM. Proceed to test 4

2

Check cable for short circuit:

- Engine ECM pin A27 to ground

- Engine ECM pin A08 to ground

- Engine ECM pin A21 to ground

OK

Proceed to test 3

Short circuit

Locate and rectify wiring fault, replace Fuse 5 and proceed to test 6

3

Check cable and terminal integrity:

- Engine ECM pin A27

- EMS main relay pin 1

- EMS main relay pin 2

- EMS main relay pin 3

- EMS main relay pin 5

OK

Disconnect main relay and proceed to test 4

Faulty

Rectify fault, proceed to test 5

4

Check fuse box fuse 3 integrity.

OK

Proceed to test 5

Fuse blown or open circuit

Replace fuse and proceed to test 5

5

Check cable continuity:

- Engine ECM pin A08 to EMS main relay pin 5

- Engine ECM pin A21 to EMS main relay pin 5

- Engine ECM pin A27 to EMS relay pin 1

- EMS main relay pin 2 to ground

- EMS main relay pin 3 to fuse box fuse 3

OK

Replace EMS main relay and proceed to test 6

Open circuit

Locate and rectify wiring fault, proceed to test 6

6

Reconnect harness, clear fault code. Switch ignition off for longer than 90 seconds. Switch ignition on and check that the EMS main relay operates. Start engine as final check.

OK

Action complete - quit test

Fault still present

Contact Triumph service