Y31/1 (EGR Vacuum Transducer)

Y31/1 (EGR Vacuum Transducer) (P0403)

Check Component Y31/1 (EGR Vacuum Transducer).

Test 1 Test Exhaust Gas Recirculation (Function Chain).
Test 2 Check omponent Y31/1 (EGR Vacuum Transducer).
Test 3 Perform Mechanical Inspection of omponent Y31/1 (EGR Vacuum Transducer).


1 Test Exhaust Gas Recirculation (Function Chain).

Test sequence
- Start engine.
- Actuate component Y31/1 (EGR vacuum transducer).(Actuate with key F2.)

Note: Component M4/3 (engine/AC electric suction fan) runs with an on/off ratio of 50 % during the actuations for safety reasons.

Note! Communication with ECU required.


2 Check omponent Y31/1 (EGR Vacuum Transducer).





Figure legend
- 019 Vacuum tester(201 589 13 21 00)
- a 3-point distributor
- Y31/1 (EGR vacuum transducer)

Test sequence
- Switch off ignition.
- Remove air cleaner.
- Connect vacuum tester to component Y31/1 (EGR vacuum transducer).
- 60 °C Coolant temperature >
- 2000 1/min Drive vehicle on the roller at approx. .

Status of relevant actual value:
- Temperature of coolant: Note! Communication with ECU required

Specified value
- Vacuum[80...220] mbar

Question
- Is the measured value okay?
Yes
The measured value is o.k.
Further possible causes of fault
- Perform mechanical inspection of component Y31/1 (EGR vacuum transducer).
No
The measured value is not o.k.
Possible cause and remedy
- Vacuum line
- Voltage supply of component Y31/1 (EGR vacuum transducer)( Wiring diagrams)
- Cable from component N3/10 (ME-SFI control module) to component Y31/1 (EGR vacuum transducer)
- Y31/1 (EGR vacuum transducer)

** End of Test **


3 Perform Mechanical Inspection of omponent Y31/1 (EGR Vacuum Transducer).

Test sequence
- Switch off ignition.
- Connect vacuum tester to the EGR valve and apply a vacuum of 300 mbar.
- Detach hose from vacuum tester.

Specified value
- EGR valve should be heard to close.

Question
- Was the test o.k.?
Yes
The test was okay. ** End of Test **
No
The test was not okay.
Possible cause and remedy
- Y31/1 (EGR vacuum transducer)

** End of Test **