Signal Too Low. Permanent Fault

SIGNAL TOO LOW. PERMANENT FAULT





Checking Signal Cable

- Ignition OFF.
- Disconnect accelerometer.
- Ignition ON.
- Connect a voltmeter between accelerometer connector terminal 3 and ground.

The voltmeter should read approx. 5 Volts.

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

If reading is incorrect:
- Check cable between accelerometer terminal 3 and engine control module (ECM) #B32 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.
- Accelerometer, air conditioning (A/C) pressure sensor and fuel tank pressure sensor connected.
- START the engine and idle it.
- Go into scrolling values list.
- Read off accelerometer signal.

The value should be approx. 2.5 Volts.

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 Signal Cable section above.