P0110

B2/5b1 (Intake air temperature sensor) (P0110)

Test 1: Check component B2/5b1 (Intake air temperature sensor).

1. Check component B2/5b1 (Intake air temperature sensor).

Test 1.1: Check component B2/5b1 (Intake air temperature sensor) using actual value.

Test 1.2: Check plausibility of actual value B2/5b1 (Intake air temperature sensor) in control module ME-SFI 2.7.

Test 1.3: Check internal resistance of component B2/5b1 (Intake air temperature sensor).

1.1. Check component B2/5b1 (Intake air temperature sensor) using actual value.
Test sequence

- Switch on ignition.
Status of relevant actual value:
- Temperature of intake air:Warning! Communication with ECU required.
Specified value

- Current temperature in area surrounding component B2/5b1 (Intake air temperature sensor)
Question

- Is the actual value o.k.?


YES
The actual value is okay.End of test

NO
The actual value is not o.k.Possible cause and remedy

- Check plausibility of actual value B2/5b1 (Intake air temperature sensor) in control module N3/10 (ME-SFI [ME] control unit).
- Check internal resistance of component B2/5b1 (Intake air temperature sensor).


1.2. Check plausibility of actual value B2/5b1 (Intake air temperature sensor) in control module ME-SFI 2.7.
Test prerequisite

- The actual value is not o.k.
Test sequence

- Detach socket at component B2/5 (Hot film mass air flow sensor).
- Switch on ignition.
Status of relevant actual value:
- Temperature of intake air:Warning! Communication with ECU required.
Specified value

- If the connection is unplugged at component B2/5b1 (Intake air temperature sensor), the value is approx. [ -40° C ].
- Bridge pin 1 in pin 3 at the unplugged connection of component B2/5b1 (Intake air temperature sensor).The value is approx. [ 150° C ].
Question

- Is the actual value o.k.?







YES
The actual value is okay.Further possible causes of fault

- Check internal resistance of component B2/5b1 (Intake air temperature sensor).


NO
The actual value is not o.k.Possible cause and remedy

- Signal wire
End of test

1.3. Check internal resistance of component B2/5b1 (Intake air temperature sensor).
Test sequence

- Switch off ignition.
- Detach coupling at component B2/5 (Hot film mass air flow sensor).
- Measure resistance with multimeter between pins (B2/5) 1 and (B2/5) 3
Specified value

- Resistor(10° C): [3420...3780]ohms
- Resistor(20° C): [2299...2541]ohms
- Resistor(30° C): [1577...1743]ohms
- Resistor(40° C): [1122...1229]ohms
- Resistor(50° C): [808...893]ohms
- Resistor(60° C): [570...630]ohms
Question

- Are the measurement values OK?







YES
The measurement values are OK.End of test

NO
The measurement values are not OK.Possible cause and remedy

- B2/5b1 (Intake air temperature sensor)
End of test