jammer48

working on my sons Honda civic hatchback. It wont start. It has spark at the plugs. The fuel pump won't prime and has no power at the harness connecting to the pump. Took the pump out and put 12 volts directly to the pump and it works. Checked the relay based on information I found on the internet and it seems to have continuity where it should when 12 volts are applied to the different posts of the relay. What next?

NotARaCist

iTrader: (1)

When you turn the key to ON(II), does the CEL come on for 2-3 seconds, then turn off?

jammer48

Yes

Former User

Key off.

Unplug ECU connector A.

Ground pin A7 or A8 in the connector.

Turn key to ON(II) and listen for whether the pump primes.

Repeat ground test multiple times to check whether the pump primes with A/7/A8 grounded.

jammer48

There are 3 plugs to the ecu. which one is connector A and which connectors are A7 and A8? when you say repeat test a number of times do you mean turn the key on and off repeatedly to see if the fuel pump begins to prime?

Former User

http://www.phearable.net/images/tech...schematics.gif

Yes

jammer48

ok Thanks a lot Ron I will check it tomorrow and get back to you.

jammer48

ok so I jumped the a7 and a8 with a wire and did what you said and the pump did not prime. now what

Heatherberry

How do you ground the pin?

Heatherberry

How did you do it? Just put a small wire between a7 and a8?

jammer48

yes sir

jammer48

on the wire harness itself (inside connector a)

Heatherberry

Yup. It didn't do anything. I'm rewiring the ground to the thermostat housing as of right now. But I got nothing.

Former User

No!

Use a piece of wire to ground A7 or A8 (wire harness connector) to the metal frame under the dash. Try both A7 and A8 in the test.

jammer48

Do a7 and a8 separately to chassis ground?

jammer48

Ok I did it and nothing happened

Former User

Do you live in the U.S.? If so, check fuses 24 and 31.

jammer48

I live in the us are they under the dash or under the hood this doesn't have a fuse diagram

Former User

See FAQs sticky.

jammer48

I pulled both fuses and inspected them they look good and I check both with a continuity light and they both checked ok

Former User

Use your multimeter to test whether voltage from fuses 31 and 24 reaches the main relay connector.

jammer48

Ron sorry for my ignorance but how would I do that

jammer48

And should that voltage be checked with the key on and should that be 12 volts?

Former User

Unplug main relay.

Turn key to ON(II).

Two of the eight pins in the connector should read battery voltage to body ground.

Post the voltage readings and the two pins and wire colors that show battery voltage.

Former User

If with the key in ON(II) you do the 5-7 pin jump test shown in the diagram below, does the fuel pump run?