RodWolf19

Hello guys,
I've got a 93 civic ex, all stock as far as I'm aware d16z6.
I'm outside and it's raining and this guy doesn't want to start.
I'm getting 1 click from the main relay when I turn the key to position 2, but that's it, it won't give me the other 2 clicks.
The CEL stays solid.
I cleaned the ground at the thermostat housing.
What's next on the diagnostic tree?
Thank you for reading.

belairbrian

Just went through a similar problem on my 93 del sol (d16z6) I assume the clicks you are referring to not hearing are the fuel pump starting and stopping.

This thread has the advice given to me to solve the problem. https://honda-tech.com/honda-civic-d...start-3234951/

Also download the FSM. It has a diagnostic tree in it.

RodWolf19

Thanks a lot, I'll be checking for an ecu fault.
I'd download the manual but I'm on mobile in front of a parts store.

RodWolf19

So I think I've grounded a7
And I can't hear the pump.
It's terminals 5 and 7 on the main relay that should make the pump work right?

RodWolf19

Thank you for the link

RodWolf19

I found a leaking capacitor and what looks like more damage around it, so I'm thinking I'm going to need a new computer.
The capacitor was disconnected, says c24 and the area around it is a lighter shade of green.

RodWolf19

New ecu arrived yesterday and fixed the issue.
Thank you all for your help.

hondacivic97si

How did you end up finding the ECU malfunction? Did you find the bug inside the ECU?

Edit: What I said about testing the relay was stupid. I think im gonna do mine agin too.

RodWolf19

I read the thread posted by user belairbrian, from what I understood from Jon@HT's diagnostic instructions, if you turn they key and your main relay doesn't cycle properly and the check engine light remains on, the fault is with the ecu. A coworker who used to be a Mazda mechanic also asked if my light was illuminated and if it ever went out, I told him no, the light stays on, he said the fault is in the ecu.
Since my check engine light was remaining illuminated and I had tested the fuel pump and main relay to be good, I opened the ecu case and found a capacitor had been leaking acid for long enough to damage the board and disconnect itself from the board.
I ordered a remanufactured ecu from Borg Warner and installed it. The main relay now cycles immediately like it used to when I first bought the car.