Signal Missing. Permanent Fault

Checking Power Cable
- Ignition off.
- Disconnect connector from solenoid valve.
- Ignition on.
- Connect a voltmeter between solenoid valve connector terminal 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 solenoid valve terminal 1 and main relay (2/32) for an open-circuit.
^ Then proceed to Verification section below.





Checking Solenoid Valve
- Ignition off.
- Connect an ohmmeter to solenoid valve between terminals 1 and 2.
- The ohmmeter should read 30 - 33 ohms.

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

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





Checking Signal Cable
- Ignition off.
- Connect the test box and check ground terminals.
- Connect an ohmmeter between test box terminal # 37 (A37) and solenoid valve connector terminal 2.
- The ohmmeter should read approx. 0 ohms.

If reading is OK:
^ The cause of the fault has been poor contact in the engine control module (ECM) and/or the solenoid valve connector. Check connectors for contact resistance, oxidation and remedy.
^ Then proceed to Verification section below.

If reading is incorrect:
^ Check cable between solenoid valve terminal 2 and engine control module # A37 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.
- Solenoid valve and engine control module connected.
- Ignition on.
- Activate solenoid valve.
- A "clicking sound"is heard from the solenoid valve when it is activated.
- Is the solenoid 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 hot corrected

No:
^ Return to Checking Power Cable section above.