Y32 (Air pump switchover valve) : Open circuit (P0412)

P0412
Y32 (Air pump switchover valve) : Open circuit (P0412)
Possible cause:
­ Z7/36 (Circuit 87 M2e connector sleeve)
­ Y32 (Air pump switchover valve)
­ K40/4f44 (Fuse 44)
­ K40/4kK (Engine electronics and chassis relay)
Affected functions:
­
Engine diagnosis
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
Test 1: Arrangement of fuses
Test 2: Check component Y32 (Air pump switchover valve).
Test 3: Power supply
1. Arrangement of fuses
End of test
2. Check component Y32 (Air pump switchover valve).
Test 2.1: Test actuation of component Y32 (Air pump switchover valve).2010 Mercedes Benz E 63 AMG Sedan (212.077) V8­6.3L (156.985)
Copyright ? 2013, ALLDATA
10.52SS
Test 2.2: Test current consumption of component Y32 (Air pump switchover valve).
2.1. Test actuation of component Y32 (Air pump switchover valve).
Test sequence
­
­
Operate engine at idling speed.
Actuate component Y32 (Air pump switchover valve).(Actuate with key F2.)
Warning!Communication with ECU required.
2.2. Test current consumption of component Y32 (Air pump switchover valve).
Figure legend
­ A ­ConnectionTest cable 35­pin socket box
­ 001 ­Sockets of component N3/10 (ME­SFI [ME] control unit)
­ 05 ­35­pin socket box
­ 050 ­126­pin socket box
­ 108 ­Test cable 266 589 01 63 00
­ N3/10 (ME­SFI [ME] control unit)
­ II 1­63ConnectionTest cable
­ III 64­126ConnectionTest cable
Warning!
­
­
Connection A of test cable 108 may NOT be connected to connection B of the 126­pin socket box (050).
Test prerequisite
­ The actuation was not okay.
Test sequence
­
­
­
Switch off ignition.
Connect socket box (126­pin) to component N3/10 (ME­SFI [ME] control unit).
Measure direct current with multimeter between sockets (F.4) 100 and [M.53] 53 of the 126­pole socket box tester.
Page 7942010 Mercedes Benz E 63 AMG Sedan (212.077) V8­6.3L (156.985)
Copyright ? 2013, ALLDATA
10.52SS
Page 795
­ Switch on ignition.
Specified value
­ Amperage[0.3...0.6] 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
­ K40/4f44 (Fuse 44)
­ K40/4kM (Circuit 30z relay)
­ Line between component N3/10 (ME­SFI [ME] control unit) and component Y32 (Air pump switchover valve)
­ Line between component K40/4 (Front passenger fuse and relay module) and component Y32 (Air pump switchover valve)
­ Y32 (Air pump switchover valve)
End of test
3. Power supply
Voltage supply via component Z7/36 (Circuit 87 M2e connector sleeve)
Possible cause and remedy
­
Check voltage supply according to wiring diagram.