No power to fuel pump

2000 MITSUBISHI MONTERO
102,000 MILES • 3.0L • V6 • 2WD • AUTOMATIC
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NJOEHOW
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I have the sport model. I got the car and it had a broken timing belt, when it broke it bent all the valves, so I replaced both heads and cam and crank sensor as the belt ripped the wires when it broke, I got the car to start and run, but it developed a very unusual problem, sometimes when I was driving it would just shut off even a cruising speeds, I would coast to the shoulder and it would start right back up, then one day we went out turned it off and did our errands came out and it would not start, so had it towed home, I checked I was getting spark but no fuel, replaced fuel pump, still no fuel, checked no power to fuel pump, so at this point I've replaced, PCM, immobilizer, key switch and key all programmed together, fuel pump replace, MFI replay, fuel pump control module I have no codes at all. I found corrosion on the wiring just above the relays, as the harness comes out from the firewall, took the harness apart and the wires looked corroded and spliced not factory, order a used harness off of eBay installed it, everything fits. But no plug for the fuel pump control module.so I am not sure what to do at this point.
Dec 13, 2018 at 6:48 PM
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DANNY L
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Hello, I'm Danny.

Okay, so do you need the wiring diagrams for the fuel pump system? Are you sure you got the right year/model harness? Hope this helps and thanks for using 2CarPros.
Danny-
Dec 13, 2018 at 7:02 PM
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NJOEHOW
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Hi Danny,

This has been a ongoing issue for four years, as I had an injury and couldn't work on this car, trying to get it going now. yeah that would be great, yes everything plugs in its the right harness, I'm just not sure why there is a different plug there where the fuel pump control module goes. the seller said it fits multiple years, but the harness fits except this plug, are there years that didn't use the fuel pump control module?
Thanks,
Joe
Dec 13, 2018 at 7:17 PM
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DANNY L
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Hello again,

Here are two pages of the wiring diagram for the fuel pump system.I magnified for you to see better.Hope this helps and feel free to ask any other questions.Thanks for using 2CarPros.
Danny-
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Dec 13, 2018 at 8:18 PM
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NJOEHOW
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Thanks Danny.

Thank you so much. yeah as I work on this I will need to ask you questions, thanks again. Can I send you a picture of the plug in question to see if you can determine what it might plug into?

Joe
Dec 13, 2018 at 8:21 PM
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DANNY L
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Hello again,

Yes, feel free to upload pictures here so we can see about things you have questions about.Thanks again for using 2CarPros.
Danny-
Dec 16, 2018 at 12:12 PM
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NJOEHOW
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Hi Danny,

Okay. So I got under the passenger side of the dash and checked out the wires were the MFI and fuel pump relay are so there is no plug for the fuel pump control module only this plug, I unloaded pics of the plug in question, van you identify this plug? Its right there by where the fuel pump control module plug should be, everything else is there and plugs in and fits. thanks for your help.
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Dec 19, 2018 at 2:47 PM
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NJOEHOW
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Hi Danny,

Was wondering if you could tell me where does the white/red wire go from the fuel pump control module? Your schematic shows all the other wires but that one. thank you

Joe
Dec 19, 2018 at 3:25 PM
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DANNY L
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Hi Joe.
That wire plugs into pin #21 at the PCM (Powertrain Control Module)
Hope that helps and keep asking questions if needed. Let's get this figured out! Thanks again for using 2CarPros.
Danny-
Dec 20, 2018 at 1:14 AM
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NJOEHOW
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Danny,

Okay, great thank you. any ideas on the electrical connector I sent you pictures of?

Thank you
Dec 20, 2018 at 7:38 AM
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DANNY L
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Hello again.

Did you check to see if it might be a harness to connect to the HVAC box or blower motor? I've attached a photo with harness/connector information.Hope this helps and thanks again for using 2CarPros.
Danny-
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Dec 24, 2018 at 12:45 AM
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NJOEHOW
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Hi Danny,

Okay, so here's what I've done: I checked the harness for a fuel pump control module plug and it is just not there, it is so weird? this harness fits everywhere else, so if there is no FPCM in the harness am I correct in assuming that that circuit is bypassed and goes directly from the fuel pump relay? this thing is throwing me for a loop. Thanks my friend.

Joe.
Dec 27, 2018 at 4:54 PM
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DANNY L
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Hello again.

The picture is kind of dark. Can you take another picture showing the wire colors on the undetermined plugs? If you upload another picture I'll trace the colors on a wiring diagram. Hope this helps and thanks again for using 2CarPros.
Danny-
Dec 29, 2018 at 12:43 AM
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NJOEHOW
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Danny,

Here are better pictures:
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Dec 29, 2018 at 4:48 PM
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DANNY L
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Hello again.

Another question. Does this have an aftermarket or stock radio? After looking at the radio wiring diagram it looks like the factory radio amplifier harness.. I've attached a picture of the diagram. See if the wire colors match.Otherwise I'll keep looking.Hope this helps and thanks again for using 2CarPros.Happy Holidays!
Danny-
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Dec 30, 2018 at 10:13 PM
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NJOEHOW
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Hi Danny,

Okay yes, it has a factory radio, CD player and an AM/FM radio, I will check.
Dec 31, 2018 at 3:03 AM
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DANNY L
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Hello again.

It sort of looks like the factory amplifier connector. Hope this helps and get back to me.Thanks again for using 2CarPros.
Danny-
Dec 31, 2018 at 1:12 PM
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NJOEHOW
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Danny

Okay, thanks my Monty doesn't have a amplifier I don't think. Okay, so this harness does not have a circuit for the Fuel Pump Control Module then so it should work?

Joe
Dec 31, 2018 at 2:02 PM
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DANNY L
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Hello,

It only shows having both fuel pump relay and fuel pump module. Both behind right kick panel. Pictures with wire colors below.
Danny-
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Dec 31, 2018 at 4:11 PM
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NJOEHOW
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Danny,

Okay thanks so much. so I'm a bit confused why this harness has no plug for the fuel pump control module? so in your professional option if I get no power to the fuel pump again once I try to start, could I go from the fuel pump relay directly to the fuel pump? this is so weird everything else plugs in, but there is no FPCM plug in the harness I'm stumped. Thanks again for your help.

Joe
Dec 31, 2018 at 4:22 PM
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DANNY L
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Hello again.

Just curious. Have you physically located both the module and the relay behind the kick panel? Are you saying you located them both but you only have a connector that fits the relay and not the module?

Danny-
Dec 31, 2018 at 4:31 PM
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NJOEHOW
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Danny,

Yes, I located the fuel pump relay and the Fuel Pump Control Module behind the kick panel, but remember I told you I had to replace the wiring harness because the original harness was bad, so when I got the harness installed I had plugs for everything behind the kick panel except the Fuel Pump Control Module, everything else plugged in fine, I've pulled the harness out and there is no plug there for the FPCM, So what I was asking is if maybe this harness does not include a circuit for the FPCM, if it is wired directly from the fuel pump relay to the fuel pump, sorry not trying to be complicated this is a unusual issue. Thanks
Dec 31, 2018 at 4:40 PM
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DANNY L
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Hello again.

Okay, I understand now. Have you thought about getting the correct harness from your local wrecking yard? Also, can you look on the under hood engine/manufacturers emissions label? I want to see if you have a California certification or if it's just Federal. I will say "This vehicle complies/conforms with California emissions requirements" or something like that. It helps me determine which wiring diagrams to look at. Thanks.

Danny-
Dec 31, 2018 at 4:52 PM
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NJOEHOW
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Danny,

Yes, I have considered I might have to change the harness again, but I was hoping this one would work. so I will check the emissions label in the morning and I will let you know. Thanks

Joe
Dec 31, 2018 at 5:01 PM
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DANNY L
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Okay sounds good. What year/application is this harness from? Have a Happy New Year and talk tomorrow.
Danny-
Dec 31, 2018 at 6:03 PM
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NJOEHOW
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Danny,

The listing said fits 1997-2003 Mitsubishi Montero Sport. same to you happy new year, and thanks again.

Joe
Dec 31, 2018 at 6:11 PM
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DANNY L
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Hello again.

I looked at a Montero Sport and they come with a 3.0 liter motor and a 3.5L. Couldn't find a fuel pump control module on the 3.0L application. That might be what that harness is far.Will look more into it tomorrow. Again thanks for using 2CarPros. Happy 2019.

Danny-
Jan 1, 2019 at 12:46 AM
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NJOEHOW
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Hey Danny,

Sorry for the delay in getting back to you. so I looked at the emissions and it says "conforms to all U.S. Emissions requirements". Thanks again.

Joe
Jan 6, 2019 at 11:01 AM
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DANNY L
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Hello again.

Okay, that looks to be just Federal emissions not including CA. I'll look again at the wiring diagrams and get back to you.
Danny-
Jan 7, 2019 at 3:55 PM
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NJOEHOW
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Okay, thank you Danny.

Joe
Jan 7, 2019 at 5:39 PM
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DANNY L
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Hello again.

The thing I've noticed looking through the wiring diagrams on a 3.0L the fuel pump control module only has four wires and on the 3.5L it's five wires.I'm still looking to find where this harness goes.
Danny-
Jan 9, 2019 at 12:47 AM
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NJOEHOW
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Okay, thanks Danny I appreciate it.
Jan 19, 2019 at 2:02 PM