Signal Too High. Permanent Fault

Safety
- See Safety instructions for handling fuel.
- Proceed to: Checking The Signal Cable section below.





Checking The Signal Cable
- Ignition OFF.
- Disconnect connector from EVAP canister shut-off valve.
- Ignition ON.
- Connect an electrician's screwdriver (3 W bulb at least) between EVAP canister shut-off valve connector terminal 2 and ground.
- The electrician's screwdriver should not light.

If reading is OK:
^ Proceed to: Replacing Component section below.

If reading is incorrect:
^ Proceed to: Checking For A Short-circuit 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.
- Proceed to: Verification section below.

Replacing Component
- Try a new EVAP canister shut-off valve.
- Proceed to: Verification section below.





Verification
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 connected.
- Ignition ON.
- Select Volvo Scan Tool (ST) to activate EVAP canister shut-off valve.
- The EVAP canister shut-off valve "clicks" when it is activated.
- Is the EVAP canister shut-off valve working?

If reading is OK:
^ Fault corrected.

If reading is incorrect:
^ Fault not found.