YES
The measurement values are OK.End of test
NO
The measurement values are not OK.Possible cause and remedy
- Lines to component B28 (Pressure sensor)
- B28 (Pressure sensor)
Further possible causes of fault
- Vacuum line
End of test
1858
Ratio of HFM signal to intake manifold pressure is too low.
Possible cause:
- B28 (Pressure sensor)
- B2/5 (Hot film mass air flow sensor)
Affected functions:
- Engine output
-------------------------------------------------
Test 1: Check component B2/5 (Hot film mass air flow sensor).
Test 2: Check component B28 (Pressure sensor).
1. Check component B2/5 (Hot film mass air flow sensor).
Test 1.1: Check signal of component B2/5 (Hot film mass air flow sensor) via actual value with engine OFF.
Test 1.2: Check signal of component B2/5 (Hot film mass air flow sensor) via actual value with engine speed greater than 3500 rpm.
Test 1.3: Check reference signal of component B2/5 (Hot film mass air flow sensor).
Test 1.4: Check power supply of component B2/5 (Hot film mass air flow sensor).
1.1. Check signal of component B2/5 (Hot film mass air flow sensor) via actual value with engine OFF.
Warning!Communication with ECU required.
