P0443

Purge valve short circuit to ground or open circuit

View and note diagnostic software 'sensor' data.

Ensure purge valve connector is secure.

Disconnect engine ECM and proceed to pinpoint test 1:

P0459

Purge valve short circuit to battery positive

Disconnect the purge valve and proceed to pinpoint test 5:

1

Check cable and terminal integrity:

- Engine ECM pin A08

- Engine ECM pin A21

- Engine ECM pin B01

- EMS relay pin 5

OK

Proceed to test 2

Faulty

Rectify fault, proceed to test 7

2

Check resistance value:

- Engine ECM pin A08 to Engine ECM pin B01

- Engine ECM pin A21 to Engine ECM pin B01

22 Ohms to 30 Ohms

Proceed to test 3

Open circuit

Disconnect purge valve and proceed to test 4

Short circuit

Disconnect purge valve and proceed to test 5

3

Check cable for short circuit:

- Engine ECM pin B01 to ground

OK

Proceed to test 7

Short circuit

Locate and rectify wiring fault, proceed to test 7

4

Check cable continuity:

- EMS relay pin 5 to valve pin 1

- Engine ECM pin B01 to valve pin 2

OK

Proceed to test 6

Open circuit

Locate and rectify wiring fault, proceed to test 7

5

Check cable for short circuit:

- Engine ECM pin A08 to Engine ECM pin B01

- Engine ECM pin A21 to Engine ECM pin B01

OK

Proceed to test 6

Short circuit

Locate and rectify wiring fault, proceed to test 7

6

Check purge valve resistance:

- Valve pin 1 to valve pin 2

22 Ohms to 30 Ohms

Proceed to test 7

Faulty

Renew purge valve, proceed to test 7

7

Reconnect harness, clear fault code and run diagnostic software function test to visually verify operation of purge valve.

OK

Action complete - quit test

Fault still present

Contact Triumph service