Signal Too High: Permanent Fault

Checking the signal cable
- ignition off.
- Disconnect connector from EVAP canister shut-off valve.
- Ignition on.
Connect a test light (3 W bulb at least) between EVAP canister shut-off valve connector terminal 2 and ground.

The test light should not light.

If reading is OK:
^ Proceed to next step below.

If reading is incorrect:
^ Proceed to Checking for a short-circuit section below.


Replacing component
Try a new EVAP canister shut-off valve. See: Emission Control Systems / Leak Detection Valve

Then continue with:
^ Verification section below.












Checking for a short-circuit
Check signal cable between EVAP canister shut-off valve connector terminal 2 and engine control module (ECM) #B19 for a short-circuit to supply voltage.

Then continue with:
^ Proceed to next step below.














Verification


Hint: After carrying out the repair, check that the fault has been remedied as follows:


- Ignition off.
- EVAP canister shut-off valve and engine control module (ECM) connected.
- Ignition on.
Activate EVAP canister shut-off valve. See: Activating Components / Functions section.
The EVAP canister shut-off valve clicks when it is activated.

Is the EVAP canister shut-off valve working?

Yes:
^ Fault corrected

No:
^ Fault not found