Signal Too Low. Permanent Fault

SIGNAL TOO LOW. PERMANENT FAULT





Checking Signal Cable

- Ignition ON.
- Disconnect temperature sensor.
- Connect a voltmeter between temperature sensor connector terminal 1 and ground.

The reading should be approx. 5 Volts.

If reading is OK:
- Try a new outside temperature sensor.
- Then proceed to Verification section below.

If reading is incorrect:
- Check cable between temperature sensor terminal 1 and engine control module (ECM) #A35 for a short-circuit to ground.
- Then proceed to Verification section below.





Verification

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

- Ignition OFF.
- Reconnect connectors, reinstall components etc.
- Ignition ON.
- Go into scrolling value list.
- Read off outside temperature.

NOTE! If the radiator is hot the outside temperature sensor will heat up if the car is stationary.

Is the outside temperature value within bounds?

Yes:
- Fault corrected

No:
- 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 Signal Cable section above.