sundragon

Where is pin 2 of the main relay grounded, does it ground at the cluster of grounds located above the ECU on the right hand side kick panel?
I had a no power condition (no fuel pump, or other power supply items) on the main relay, temp ground at pin 2 solved the issue.

any help appreciated.

thanks

CX-Adam

G101

sundragon

That splains all the tomfoolery, work was performed on the cooling system, must have disrupted the ground to the main relay. Who'd have thunk it was terminated there! LOL

thanks much!

CX-Adam

No problem. Is everything working fine, now?

sundragon

Yes, all is well. Having that diagram was extremely helpful. Cleaned up all the grounds in the engine bay while I was at it, Runnin like a champ now, thanks again.

cleanwerkz

Ok guys sorry to but in, but i have a quick question on this subject....

If i jump 1/7 and the fuel pump works does that mean my g101 ground is bad?

( no spark and no fuel power )

also checked fuse 31 with the test light and it has 0 power also.

sundragon

Jumping pin 1 to 7 applies +12v from the battery to the fuel pump.

In normal operation the relay applies power to the fuel pump during cranking through pin 5 (ignition).

First thing you need to verify is if the relay (both sections) are energizing. One energizes when the ignition is switched on, the other when cranking.
If you don't hear the relay click on then off when you turn on the ignition, then you need verify if you have positive voltage at the relay with respect to ground. In my case I had no ground, thereby there was no path for current to flow from the ignition switch through the relay pull in coil back to ground. Thus, no fuel pump operation, no ECU power, or injector power.

If the relay is energizing and pulling in the contacts and you don't have current flow, odds are a most likely cracked solder joint (open circuit) or bad relay contacts. Very common for the cracked solder joints and or bad ground at the thermostat.
Here a couple links to get you on your way.

https://www.youtube.com/watch?v=QVxOQTSPyGY
https://www.youtube.com/watch?v=X5Qp-ToR8KA
Main Relay Fix, Troubleshooting (Honda, Acura) and how to solder