K40/7kN (Air pump relay) (P0410)

K40/7kN (Air pump relay) (P0410)

Test 1: Check component K40/7kN (Air pump relay).

1. Check component K40/7kN (Air pump relay).
Test prerequisites

- Actuation of component M33 (electric air pump) is not OK.
Test sequence

- Switch off ignition.
- Connect socket box (35-pin) to component N3/10 (ME-SFI [ME] control unit).
- Connect socket box (126-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 (4.22) 107 of the 126-pole socket box tester.
- Switch on ignition.
Warning!Perform the measurement only for a short time so that component M33 (electric air pump) does not overheat.Specified value

- Amperage[0.1...0.3] A
- Component M33 (electric air pump) is switched on and is heard to run.
Question

- Is the measurement value OK?


YES
The measurement value is OK.Question

- Does component M33 (electric air pump) run during the current measurement?


YES
The test was okay.End of test

NO
Test actuation of component M33 (electric air pump).
Figure legend

- M33 (electric air pump)
Test sequence

- Switch off ignition.
- Detach socket at component M33 (electric air pump).
- (M33) Measure direct voltage with multimeter between 2 and 1 (M33)
- Switch on ignition.
- Insert bridge for actuating component K40/7kN (Air pump relay).:
- Bridge between socket (5.5) 5 of the 35-pole socket box tester and socket (4.22) 107 of the 126-pole socket box tester.
Specified value

- Voltage[11.0...14.5] V
Question

- Is the measurement value OK?













YES
The measurement value is OK.Further possible causes of fault

- M33 (electric air pump)
End of test

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

- Voltage supply of component K40/7kN (Air pump relay)
- K40/7kN (Air pump relay)
- Lines to component M33 (electric air pump)
- M33 (electric air pump)
End of test

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

- Lines to component K40/7kN (Air pump relay)
- K40/7kN (Air pump relay)
End of test