Sunday, October 8, 2017

Control unit 'Fuel pump' : Short circuit to positive (P0629) Mercedes Benz E 63 AMG Sedan (212.077) V8­6.3L (156.985)

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Control unit 'Fuel pump' : Short circuit to positive (P0629)
Control unit 'Fuel pump' : Short circuit to positive (P0629)
Possible cause:2010 Mercedes Benz E 63 AMG Sedan (212.077) V8­6.3L (156.985)
Copyright ? 2013, ALLDATA
10.52SS
­ Fuel system control unit
Affected functions:
­
Engine output
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
Test 1: Signal wire PWM signal Fuel pump
1. Signal wire PWM signal Fuel pump
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 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 [F.17] 113 of the 126­pole socket box tester.
­ Switch on ignition.
Specified value
­ Amperage[8...15] mA
Question
­
Is the measurement value OK?
Page 862010 Mercedes Benz E 63 AMG Sedan (212.077) V8­6.3L (156.985)
Copyright ? 2013, ALLDATA
10.52SS
Page 87
YES
The measurement value is OK.Other possible cause of fault
­
In the event of stored faults with a high fault frequency count or in the event of customer complaints, check lines and connectors
for loose contact and corrosion..
­ B4/15 (Fuel pressure sensor)
End of test
NO
The measurement value is not OK.Possible cause and remedy
­ Check lines to components N118/3 (Left fuel pump control unit) and N118/4 (Right fuel pump control unit) as per wiring diagram.
Further possible remedies
­
Read fault memories of the control units N118/3 (Left fuel pump control unit) and N118/4 (Right fuel pump control unit).