1.1. Check component B28 (Pressure sensor) using actual value.
Test sequence
- Switch on ignition.
Status of relevant actual value:
- Coolant temperature:Warning! Communication with ECU required.
- Intake manifold pressure (ADC):Warning! Communication with ECU required.
Specified values
- Coolant temperature > 80锟斤拷 C
- Intake manifold pressure,Ignition ON: > 3.5 V
- Intake manifold pressure,Operate engine at idling speed.:< 2 V
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 power supply of component B28 (Pressure sensor).
- Test signal voltage of component B28 (Pressure sensor).
Further possible causes of fault
- Vacuum line
1.2. Check power supply of component B28 (Pressure sensor).
Figure legend
- B28 (Pressure sensor)
- 126/1 -'Secondary air injection left bank of cylinders' shutoff valve
Test prerequisite
- The actual value is not o.k.
Test sequence
- Switch off ignition.
- Detach coupling at component B28 (Pressure sensor).
- Measure direct voltage with multimeter between sockets (B28) 1 and (B28) 3
- Switch on ignition.
Specified value
- Voltage[4.75...5.25] V
Question
- Is the measurement value OK?
