Cranking but not starting

2011 MERCEDES BENZ GLK 350
221,452 MILES • 6 CYL • 2WD • AUTOMATIC
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BLESSING EWOBOR
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Hi, I am currently working on the car listed above. I have checked the fuse and relay relating to it, they have no problem. There is spark coming from the spark plugs, the fuel injectors were pulsing but when I checked the fuel rail, I realized that the fuel pump is not pumping out fuel. I located the fuel pump under the back seat, I tested it there was no power source, I tested the fuel pump control module, there's power source on one of the small wires but there is no power source in any of the wires that connected the module and the fuel pump.
Does that mean the module is bad or is there any thing else to check for? Please also help me with the circuit diagram of system.
Sep 10, 2020 at 6:11 PM
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KASEKENNY
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You should have power on two wires coming to the control module. The red/green wire and the pink/white wire.

If you don't have 12 volts on these two then we need to check both the fuses and go from there.

Let me know what you find. Thanks
Sep 10, 2020 at 6:37 PM
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BLESSING EWOBOR
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Thank you but the first picture is blur. please could you make it clear?
Sep 10, 2020 at 7:31 PM
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KASEKENNY
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Sorry. That is just a screen shot of the entire wiring diagram that you can zoom in on. The others are zoomed in on the fuel pump components. However, here is the same diagram a little closer.
Sep 10, 2020 at 7:59 PM
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BLESSING EWOBOR
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Thank you, I have fixed it.
Sep 12, 2020 at 5:18 PM
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KASEKENNY
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Okay, great. Can you let us know what the repair was because that info will surely help others that visit this site that may have a similar issue? Thanks for any updates.
Sep 13, 2020 at 6:51 PM
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BLESSING EWOBOR
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The problem was a fuse in the rear Sam control unit (20A), it was not contacting properly.
Sep 16, 2020 at 9:52 PM
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KASEKENNY
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Awesome. You are fixing them left and right. Thanks for the update and continuing to come back. Talk to you next time.
Sep 17, 2020 at 1:47 PM