P0442

A1: RETRIEVE DTCS

NOTE: Battery and or ECM disconnection prior to scanning will erase all data, ensure that the correct DTC is present.





Connect scan tool.
Record DTC(s), freeze frame data and go to A2


A2: MECHANICAL SYSTEM CHECK





Carry out a system mechanical verification.
- Fuel cap missing or incorrectly fitted?
- Fuel cap seal defective?
- Leak / damage on carbon canisters or evaporative pipework?
- CCV incorrectly fitted?
- Purge valve vacuum line leak or blockage?
- Purge line blocked?
- Purge line damaged / leaking?

Yes
Rectify fault(s)
Go to A6

No
Go to A3


A3: CHECK PURGE VALVE RESISTANCE





With EM039 disconnected, measure the resistance of the EVAP valve coil at pins 1 and 2

Is the resistance between 25 and 40 Ohms?

Yes
Reconnect EM039
Go to A4

No
Renew EVAP valve


A4: CHECK ELECTRICAL FEED





With EM015, EM039 and EM010 disconnected:
Use an appropriate link lead to bridge EM010/016 and EM010/023 (to energize EMS control relay)
Measure the voltage between EM039/001 and EM010/022

B+ ?

Yes
Go to A5

No
Inspect harness / connectors EM010, EM039 and splice EMS30 for bent / pushed back pins, damage or corrosion. Repair as necessary and test the system for normal operation.


A5: CHECK CURRENT DRAWN





With EM039 disconnected, measure the resistance between EM015/003 and EM039/002

Is the resistance < 0.5 Ohms ?

Yes
Go to A6

No
Go to B5 P0444


A6: END
Perform appropriate service drive cycle and check for the presence of DTC.

Has the fault code cleared?

Yes
STOP

No
Contact Jaguar Service