1.2. Check signal of component B2/5 (Hot film mass air flow sensor) via actual value with engine speed greater than 3500 rpm.
Warning!Communication with ECU required.
1.3. Check power supply of component B2/5 (Hot film mass air flow sensor).
Image legends
- B2/5 (Hot film mass air flow sensor)
- Connector (5-pin)
Test prerequisite
- The actual value is not o.k.
Test sequence
- Switch off ignition.
- Detach coupling at component B2/5 (Hot film mass air flow sensor).
- Measure direct voltage with multimeter between sockets (B2/5) 2 and (B2/5) 1
- Switch on ignition.
Specified value
- Voltage[11.0...15.0] V
Question
- Is the measurement value OK?
YES
The actual value is okay.Further possible causes of fault
- Unmetered air
- Signal wire
- B2/5 (Hot film mass air flow sensor)
End of test
NO
The measurement value is not OK.Possible cause and remedy
- N10/1f43 (Fuse 43)
- Cable for voltage supply
