Purge valve short circuit to ground or
open circuit
View and note diagnostic software
'sensor' data.
Make sure the purge valve connector
is secure.
Disconnect engine ECM and proceed
to pinpoint test 1:
Purge valve short circuit to battery
positive
Disconnect the purge valve and
proceed to pinpoint test 5:
Check cable and terminal integrity:
- Engine ECM pin A08
- Engine ECM pin A21
- Engine ECM pin B01
- EMS relay pin 5
Proceed to test 2 for P0443
Proceed to test 3 for P0459
Rectify fault, proceed to
test 7
Check cable for short circuit:
P0443
- Engine ECM pin B01 to ground
Locate and rectify wiring
fault, proceed to test 7
Check cable for short circuit:
P0459
- Engine ECM pin A06 to EMS relay
pin 5
Locate and rectify wiring
fault, proceed to test 7
Check cable continuity:
- EMS relay pin 5 to purge valve pin 2
- Engine ECM pin B01 to purge valve
pin 1
Locate and rectify wiring
fault, proceed to test 7
Check resistance value, reconnect
Purge valve:
- Engine ECM pin B01 to EMS relay
pin 5
Disconnect purge valve and
proceed to test 6
Disconnect purge valve and
proceed to test 6