P2571

The PremAir sensor has a sporadic malfunction.


Possible cause:

- B11/15 (PremAir sensor)
Affected functions:

- Engine diagnosis

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Test 1: Check component B11/15 (PremAir sensor).

1. Check component B11/15 (PremAir sensor).

Test 1.1: Check power supply of component B11/15 (PremAir sensor).

Test 1.2: Check LIN lines between control unit N3/10 (ME-SFI [ME] control unit) and component B11/15 (PremAir sensor).

Test 1.3: NoteThe PremAir sensor must be firmly latched and bonded to the PremAir radiator.

1.1. Check power supply of component B11/15 (PremAir sensor).
Check electrical line for power supply of component B11/15 (PremAir sensor) for loose contact, damage and corrosion, repair if necessary.

1.2. Check LIN lines between control unit N3/10 (ME-SFI [ME] control unit) and component B11/15 (PremAir sensor).
Check LIN lines between control unit N3/10 (ME-SFI [ME] control unit) and component B11/15 (PremAir sensor).
Test sequence

- Unplug connector F at control unit N3/10 (ME-SFI [ME] control unit).
- Disconnect connector at component B95 (Battery sensor).
- Test cable for short circuit to positive and to ground with ohmmeter.
Question

- Was the test o.k.?













YES
The measurement value is OK.End of test

NO
The test was not okay.Possible cause and remedy

- Check electrical lines and connectors for short circuit, open circuit, loose seating and damage using the appropriate wiring diagram.
End of test

1.3. NoteThe PremAir sensor must be firmly latched and bonded to the PremAir radiator.

1.3. No further information available.