Signal Missing. Permanent Fault

Checking Power Cable
- Ignition off
- Disconnect connector from canister purge (CP) valve.
- Ignition on.
- Connect a voltmeter between EVAP valve connector 1 and ground.
- The voltmeter should read battery voltage.

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

If reading is incorrect:
^ Check power cable between canister purge valve terminal 1 and main relay (2/32) terminal 3 for an open-circuit.
^ Then proceed to Verification section below.





Checking Canister Purge Valve
- Ignition off
- Connect an ohmmeter canister purge valve terminals 1 and 2.
- The ohmmeter should read 22 - 30 ohms.

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

If reading is incorrect:
^ Try a new canister purge valve.
^ Then proceed to Verification section below.





Checking Signal Cable
- Ignition off.
- Connect the test box and check ground terminals.
- Connect an ohmmeter between terminal # 39 (A39) on the test box on the test box and canister purge valve connector terminal 2.
- The ohmmeter should read approx. 0 ohms.

If reading is OK:
^ The fault has been caused by loose connections in the engine control module (ECM) and/or canister purge valve connectors. Check connectors for contact resistance or oxidation and remedy.
^ Then proceed to Verification section below.

If reading is incorrect:
^ Check cable between canister purge valve terminal 2 and engine control module # A39 for an open-circuit.
^ Then proceed to Verification section below.





Verification
- After carrying out the repair, check that the fault has been remedied as follows.
- Ignition off.
- Canister purge valve and control module connected.
- Ignition on.
- Activate canister purge valve.
- A "clicking sound" is heard from the canister purge valve when it is activated.
- Is the canister purge valve working?

If reading is OK:
^ Fault corrected

If reading is incorrect:
^ Proceed to test step below.

Fault-tracing Information
- The verification result shows that the fault persists.
- Do you want to exit fault-tracing?

Yes:
^ Fault not corrected

No:
^ Return to Checking Power Cable section above.