B28 (Pressure Sensor)
B28 (Pressure Sensor)
Check Component B28 (Pressure Sensor). (only (USA), CSO)
Test 1 Check Component B28 (Pressure Sensor) Using Actual Value.
Test 2 Test Voltage Supply of Component B28 (Pressure Sensor).
Test 3 Test Signal Voltage of Component B28 (Pressure Sensor).
1 Check Component B28 (Pressure Sensor) Using Actual Value.
Test sequence
- Switch on ignition.
Status of relevant actual value:
- Intake manifold pressure (ADC) (only (USA), CSO): Note! Communication with ECU required
Specified values
- Intake manifold pressure (ADC),Ignition ON: >3,5 V
- Intake manifold pressure (ADC),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
- Test voltage supply of component B28 (Pressure sensor).
- Test signal voltage of component B28 (Pressure sensor).
Further possible causes of fault
- Vacuum line
** End of Test **
2 Test Voltage Supply of Component B28 (Pressure Sensor).
Figure legend
- B28 (Pressure sensor)
Test requirement
- The actual value is not o.k.
Test sequence
- Switch off ignition.
- Detach the socket at the component B28 (Pressure sensor).
- (B28) 2 <--> 3 (B28)
- Switch on ignition.
Specified value
- Voltage[4.7...5.3] V
Question
- Is the measured value okay?
Yes
The measured value is o.k.
Further possible causes of fault
- Test signal voltage of component B28 (Pressure sensor).
No
The measured value is not o.k.
Possible cause and remedy
- Test cable to component B28 (Pressure sensor) for short circuit to each other.
** End of Test **
3 Test Signal Voltage of Component B28 (Pressure Sensor).
Figure legend
- 019 Vacuum tester
- a3-point distributor
- B28 (Pressure sensor)
Test requirement
- The voltage supply of the component B28 (Pressure sensor) is o.k..
Test sequence
- Switch off ignition.
- Connect the vacuum tester to the input of component B28 (Pressure sensor) with the 3 x distributor.
- Connect socket box to component N3/10 (ME-SFI control module).
- (E.24) 80 <--> 79 (E.23)
Specified values
- Ignition ON: >3,5 V
- Operate engine at idling speed.(Vacuum> 500 mbar): <2 V
Question
- Are the measured values okay?
Yes
The measured values are o.k. ** End of Test **
No
The measured values are not o.k.
Possible cause and remedy
- Leads to component B28 (Pressure sensor)
- B28 (Pressure sensor)
Further possible causes of fault
- Vacuum line
** End of Test **