Faulty Signal

Faulty signal

Checking for intermittent fault




- Ignition on.
- Activate EVAP canister shut-off valve.
A "click" should be heard when the EVAP canister shut-off valve is activated.





Is the EVAP canister shut-off valve working?

Yes - Fault-tracing information

No - Checking connector (resistance)

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Checking connector (resistance)




- Ignition off.
Check EVAP canister shut-off valve connector for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.






Continue - Checking connector (activating EVAP canister shut-off valve)

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Checking connector (activating EVAP canister shut-off valve)








- Reinstall components, reconnect connectors etc.
- Ignition on.
Activate EVAP canister shut-off valve.
Check if a "click" is heard from the EVAP canister shut-off valve.
If the EVAP canister shut-off valve now functions it means that the cause of the fault has been loose connections in the connector.





Is the EVAP canister shut-off valve working?

Yes - Fault Found

No - Checking wiring and components

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Checking wiring and components
Check cable between control module #B40 and EVAP canister shut-off valve terminal 2 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault , a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault and a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check cable between EVAP canister shut-off valve terminal #1 and system relay terminal #3 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Remedy as necessary.

Other information:
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box.
- To access/replace the control module, see the relevant service procedure.
- To access/replace the EVAP canister shut-off valve, see Replacing the shut-off valve for the carbon filter container Service and Repair.
- For information about signals, see Signal specification Signal Description / Specification.





Was a fault found in the wiring?

Yes - Verification

No - Replacing component

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Replacing component




Try a new EVAP canister shut-off valve according to Replacing the shut-off valve for the carbon filter container Service and Repair.


Continue - Verification

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Fault-tracing information
Control module previously registered a fault. The fault is now no longer present.


Continue - Fault-tracing information

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Fault-tracing information




Information

Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Do you want to view the information again?

Yes - Attempt New Test

No - Fault Found

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Attempt New Test - Checking for intermittent fault

FAULT FOUND - DONE

DONE - DONE

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Verification




Verification

Verification

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








- Ignition off.
- Reconnect connectors, reinstall components.
- Ignition on.
- Activate EVAP canister shut-off valve.
A "click" should be heard when the EVAP canister shut-off valve is activated.





Is the EVAP canister shut-off valve working?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - Fault Found

FAULT-TRACING FAILED - No Fault Found

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Fault-tracing information




Information

Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Do you want to exit fault-tracing?

Yes - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking for intermittent fault

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