P500 P500 won’t fire

[Andrewwray88]

Hi guys new to the group! My 2017 pioneer 500 won’t fire, no fuel pump and no dash. Put in new fuses, and relays. Tried different battery, different cpu, different ignition switch, cleaned connectors, checked the grounds and I have power going to the pcm. Would appreciate some input! Thanks

 

[TxDoc]

Welcome to the Honda dimension.

Lotta nice and helpful people.

Someone with 500 expertise will come in, stand by.

Sent from my moto z4 using Tapatalk

 

[JollyJoker]

Did you clean up the grounds that are clustered together on the frame below and to the right of the battery box?

 

[906UP]

Hi guys new to the group! My 2017 pioneer 500 won’t fire, no fuel pump and no dash. Put in new fuses, and relays. Tried different battery, different cpu, different ignition switch, cleaned connectors, checked the grounds and I have power going to the pcm. Would appreciate some input! Thanks

Do you have a 12v test light or a volt meter? Start at the battery and work your way out. See if you have voltage at the battery, then from the battery + to the frame, next check the "feed" side of the 40 amp main fuse. In the diagram below a solid red wire goes from the battery + to the main fuse and a red & white striped wire (R&W) from the main fuse feeds everything else. Start with that and report back.

 

[Andrewwray88]

Do you have a 12v test light or a volt meter? Start at the battery and work your way out. See if you have voltage at the battery, then from the battery + to the frame, next check the "feed" side of the 40 amp main fuse. In the diagram below a solid red wire goes from the battery + to the main fuse and a red & white striped wire (R&W) from the main fuse feeds everything else. Start with that and report back.

View attachment 243715

Yes I started with those and haven’t found anything.

 

[Andrewwray88]

Yes I started with those and haven’t found anything.

Also what year wiring diagram do you have?

 

[Andrewwray88]

Did you clean up the grounds that are clustered together on the frame below and to the right of the battery box?

Yes

 

[906UP]

Also what year wiring diagram do you have?

It's from the Honda P5 Factory Service manual, 2015-2019

 

[906UP]

Do you have power at the 30a ES, 10a Pump & 15a Fan fuses? These should have power all the time.

I misread the 1st post and see you have power at the ECM.......at what pin #?

 

[Andrewwray88]

Do you have power at the 30a ES, 10a Pump & 15a Fan fuses? These should have power all the time.

I misread the 1st post and see you have power at the ECM.......at what pin #?

Red yellow not sure pin #

 

[906UP]

I sent you a PM with a wiring diagram, check for power with the key on at the red/green wire on the speedo/display, if you have power the problem is a ground (negative) issue, if you don't have power you have a relay, connection to the relays or a broken wire somewhere in between.

 

[906UP]

Red yellow not sure pin #

That would be pin B-1, that means you also have power at the fuse box. When you turn the key on see if you have power at the Fan & Acc fuses.

 

[Andrewwray88]

That would be pin B-1, that means you also have power at the fuse box. When you turn the key on see if you have power at the Fan & Acc fuses.

Yes have power to both

 

[Andrewwray88]

Yes have power to both

Another thing to add. I only tried a 2019 cpu on mine and I have a 2017 would that change anything?