Mercedes Benz Truck G 550 Diagnostic Trouble Codes，0491

Mercedes-Benz Mercedes Benz OEM Parts Mercedes Benz OE Replacement Parts

0491
Relay 'Fuel pump'
Possible cause:
- N10/2kA (Fuel pump relay)
Affected functions:
- Engine start
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Test 1: Check component Relay 'Fuel pump'.
1. Check component Relay 'Fuel pump'.
Figure legend
- A -ConnectionTest cable 35-pin socket box
- 001 -Sockets of component N3/10 (ME-SFI [ME] control unit)
- 05 -35-pin socket box
- 050 -126-pin socket box
- 108 -Test cable 266 589 01 63 00
- N3/10 (ME-SFI [ME] control unit)
- II 1-63ConnectionTest cable
- III 64-126ConnectionTest cable
Warning!
- Connection A of test cable 108 may NOT be connected to connection B of the 126-pin socket box (050).
Continue to test with button F2
Test sequence
- Switch off ignition.
- Connect socket box (126-pin) to component N3/10 (ME-SFI [ME] control unit).
- Measure direct current with multimeter between sockets [F.4] 100 and [F.17] 113 of the 126-pole socket box tester.
- Switch on ignition.
Specified value
- Amperage[0,1...0,3] A
Mercedes Benz Truck G 550 (463.236) V8-5.5L (273.963)  Diagnostic Trouble Codes  Page 512
- Component M3 (Fuel pump assembly) is switched on and is heard to run.
Question
- Is the measurement value OK?
YES
The test was okay.End of test
NO
The measurement value is not OK.Possible cause and remedy
- Lines to component N10/2kA (Fuel pump relay)
- N10/2kA (Fuel pump relay)
End of test