P2024

Y32/2 (air pump switchover valve, right bank of cylinders) (P0412)

Test 1: Check component Y32/2 (air pump switchover valve, right bank of cylinders). ( Valid for (USA) , EURO 3 )

1. Check component Y32/2 (air pump switchover valve, right bank of cylinders). ( Valid for (USA) , EURO 3 )

Test 1.1: Actuate component Y32/2 (air pump switchover valve, right bank of cylinders).

Test 1.2: Test current consumption of component Y32/2 (air pump switchover valve, right bank of cylinders).

Test 1.3: Test 'Secondary air injection right bank of cylinders' shutoff valve.

1.1. Actuate component Y32/2 (air pump switchover valve, right bank of cylinders).
Test sequence

- Ignition ON
- Actuate component Y32/2 (air pump switchover valve, right bank of cylinders).(Actuate with key F2.)


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

Warning!Communication with ECU required.


1.2. Test current consumption of component Y32/2 (air pump switchover valve, right bank of cylinders).
Test sequence

- Switch off ignition.
- Connect socket box (126-pin) to component N3/10 (ME-SFI [ME] control unit).
- Connect socket box (35-pin) to component N3/10 (ME-SFI [ME] control unit).
- Measure direct current with multimeter between socket (5.5) 5 of the 35-pole socket box tester and socket (2.11) 21 of the 126-pole socket box tester.
- Switch on ignition.
Specified value

- Component Y32/2 (air pump switchover valve, right bank of cylinders) is heard to operate.
- Amperage[0.3...0.5] A
Question

- Is the measurement value OK?


YES
The measurement value is OK.End of test

NO
The measurement value is not OK.Possible cause and remedy

- Voltage supply of component Y32/2 (air pump switchover valve, right bank of cylinders)
- Lines to component Y32/2 (air pump switchover valve, right bank of cylinders)
- Y32/2 (air pump switchover valve, right bank of cylinders)
End of test

1.3. Test 'Secondary air injection right bank of cylinders' shutoff valve.
Figure legend

- 019Vacuum tester
- 126/1'Secondary air injection right bank of cylinders' shutoff valve
- 126/2'Secondary air injection left bank of cylinders' shutoff valve
The illustration shows the connection of the vacuum tester for example at component 126/2.Test prerequisites

- Actuation of component Y32/2 (air pump switchover valve, right bank of cylinders) was OK.
Test sequence

- Detach shaped hose at component 126/2.
- Connect vacuum tester to component 126/2.
- Use the vacuum tester to set a vacuum of 20 mbar.
Question

- Is the vacuum achieved?







YES
Figure legend

- 019Vacuum tester
- 126/1'Secondary air injection right bank of cylinders' shutoff valve
- 126/2'Secondary air injection left bank of cylinders' shutoff valve
The illustration shows the connection of the vacuum tester for example at component 126/2.Test sequence

- Connect vacuum tester to component 126/2.
- Run engine.
- Use the vacuum tester to set a vacuum of 20...25 mbar.
Specified value

- When vacuum is supplied to component 126/2, the shutoff valve opens, as a result of which a perceptible suction can be felt at the connection flange.(See arrow)
Question

- Was the test o.k.?







YES
The test was okay.End of test

NO
The test was not okay.Possible cause and remedy

- 'Secondary air injection right bank of cylinders' shutoff valve
End of test

NO
The test was not okay.Possible cause and remedy

- 'Secondary air injection right bank of cylinders' shutoff valve
End of test