ASD relay ?

On my 98 Dodge Stratus, I am not getting voltage back to the fuel pump plug,
from the power distribution center. When I checked both the fuel pump
relay, and ASD relay, they both checked out fine. When I checked for
voltage at pin 30, inside the PDC box, for the ASD relay, I got 12 volts.
Then at pin 86, for the same relay, I got 12 volts with the key off and I am
only suppose to get the voltage at that pin when the key is turned on. Is
this telling the PCM to turn off the fuel pump and ignition? The car is in a
no start situation. I am getting spark with my spark tester, but the fuel
pump isn't turning on, so this seems like a fuel issue to me now. I can't
find anywhere where it talks about having voltage at that ASD when the key
is not turned on. Any ideas?

Thanks
Randy

 

Keep in mind you only have about 3 sec's of battery voltage at the fuel pump
when the key is turned on. Are you testing this while someone turns the key
on for you while you are at the connector?

Glenn Beasley
Chrysler Tech

 

yes i had a friend turn the key on while i had my fluke meter set to dc to
measure the voltage. it read OL on my meter,which seems strange to me?

 

I had the same problem on my 98 Sebring with 2.5. Ended up being the ecu
that was fried.

 

The ASD relay supplies battery voltage to the ignition coil. If you
have spark, it's working. You need to be looking at the fuel
pump/relay/wiring if the fuel pump's not working.

 

Have you checked fault codes before poking around and disconnecting
components? have you sprayed a combustion liquid such as throttle body
cleaner into the throttle body to see if it starts and shuts back down?
Like bllsht said,If you have spark, the ASD is working, check fuel pump
relay. Pin 87 12 volts with key on. Pin 30/35 12 volts all the time.Pin 85
fuel pump control circuit If you ground the fuel control circuit with the
key on and relay connected the pump should kick on, or jump 30/35 with 87
relay out the fuel pump should kick on.

Glenn Beasley
Chrysler Tech

 

Glenn , as you may recall this car has been my nightmare since November.
there is now none or has there ever been any codes with this car . i checked
both relays like you said with power on them, jumpered from the battery and
a ground. then without power on them, checking continuity etc. both relays
checked out fine to me according to my repair manual. i wonder if the PDC
block isn't making a good connection ? my boss said to do the same thing as
you did , grounding out pin 85 ,so I'll try that. i read where the ASD
controls fuel to the injectors and power to the coil etc. is this correct?
have you sprayed a combustion liquid such as throttle body

thanks Randy

 

well I've realized that the ASD is fine and the fuel relay/circuit is the
issue. it seems that when I check pin86 of the fuel pump relay with the key
on, I get no voltage there. I then went and checked #10 fuse for the coil of
the relay inside the PDC and sometimes I would get the voltage there and
sometimes not. I also noticed when I turned the key on that sometimes all
the lights would come on, on the dash, and sometimes not. could this still
be the PCM? I tried jumping the relay ,per glenns instructions, and the pump
still didn't come on. I also tried to ground pin #85 to no avail. any more
ideas? thanks

 

Dumb question here. Did you check all the fuses in the PDC, there are 2
fuses that control the fuel pump relay circuit.# 10 and #8. This is such an
easy circuit and I cant believe you haven't fixed this problem yet.You
mention nothing about spraying throttle body cleaner into the intake to see
if it starts?? You are either not checking the correct wire at the fuel pump
or you have something else wrong with the vehicle. when ever you get around
to spraying the throttle body with throttle body cleaner to verify it is a
fuel problem let me know

 

Dumb question here. Did you check all the fuses in the PDC, there are 2
fuses that control the fuel pump relay circuit.# 10 and #8. This is such an
easy circuit and I cant believe you haven't fixed this problem yet.You
mention nothing about spraying throttle body cleaner into the intake to see
if it starts?? You are either not checking the correct wire at the fuel pump
or you have something else wrong with the vehicle. when ever you get around
to spraying the throttle body with throttle body cleaner to verify it is a
fuel problem let me know
Is #8 fuse blown?

 

no. i don't see the sense in spraying anything in the throttle body if i'm
not getting voltage to the fuel pump. both fuses # 8 & # 10 are ok. i'm in
school for industrial electrician so reading the wiring diagram, testing the
relay's etc. are of no problem to me. i agree this should be very simple to
trace. if no voltage at relay pin 86 in the pdc, then go to the fuses. well
the fuses are good, now what? i pulled the fuses out and checked for voltage
where they go and got voltage where the 20 amp fuse goes, but only sometimes
where the 10 amp one goes,this is with the key turned on it's like it's
sporadic. as far as the fuel pump plug goes, i'm testing the dark
green/white and the black wire on the plug, this is according to the wiring
diagram.
i'm beginning to think there's some intermittent problem with the pcm .

..

 

sometimes

The 10 amp is from Ign switch. If you suspect that bad why not supply 12 to
the fuse thru a jumper wire to see if this works, If it does, back track to
the switch. The 12 volts on that fuse has nothing to do with the PCM. The
only thing the PCM does in this circuit is groud the fuel pump relay control
circuit so that the fuel pump relay stays engergized. Thats why I said
ground the control side of the realy to see if it starts. you said it didnt
work so now we can say it isnt the PCM. And it seemed to me that you did all
tests for the fuel pump circuit and all check good...thats why I said spray
something into the throttle body to see if the vehicle starts

 

in my wiring diagram for this fuse it shows a dark blue/white wire going to
the fuse and to the pcm and says it is a( fused ign switch out ) when they
show those fuses in the pdc ,they show where one side of each fuse where
they go, what about the other side of them. am I missing something? thanks

 

The 10 amp is from Ign switch. If you suspect that bad why not supply 12 to
the fuse thru a jumper wire to see if this works, If it does, back track to
the switch. The 12 volts on that fuse has nothing to do with the PCM. The
only thing the PCM does in this circuit is ground the fuel pump relay
control
circuit so that the fuel pump relay stays energized. That's why I said
ground the control side of the relay to see if it starts. you said it didn't
work so now we can say it isn't the PCM. And it seemed to me that you did
all
tests for the fuel pump circuit and all check good...that's why I said spray
something into the throttle body to see if the vehicle starts

 

Yes it is a darkblue/white wire coming from the fused igniton switch, this
wire goes to fuel pump relay. In order to make this relay work it has to
have a ground. The ground would be the brown with a light green wire going
from relay to PCM. As I said, if this wire was not grounding out internally
inside the PCM then yes the PCM would be bad. BUT!!! since you said you
grounded the fuel pump relay control wire long ago and the pump did not turn
on that tells me that it is not a PCM problem because you manually grounded
it. Therefore as I stated you either have something else wrong with this
vehicle and It is not fuel related ( and you wont verify this by spraying
something into the throttle body to see if it starts) or you arent doing
something right with the tests. I tried, Good luck

 

To: "maxpower" <>
Subject: Re: ASD relay ?
Date: Sat, 2 Feb 2008 11:34:45 -0600



Glenn , everything I see in my repair book and online in alldata.com
says
the fuel pump plug should be 4 pin, 2 for the pump and 2 for the fuel
level
sensor. I 'm sure i have the right plug,it goes through trunk down to
fuel
pump and this one has 8 pins in it ? any thoughts?Yes I do have a thought,
first, Dont confuse this issue by sending me post to emailSecond, if you
have been testing an 8 way connector you are using the wrong connectorAs I
said ealier you are doing something wrong because this is a very easy test.
You areTesting the wrong connector. IT IS A 4 WAY CONNECTOR!!! located
behind the rear seat and goes thru the floor that way.Before I reply to
another post you tell me "Glenn I sprayed some throttle body cleaner into
the throttle body and it started or itdidnt start"

 

just to let you know , it IS an 8 pin connector that goes down through the
floor to the fuel pump area, and when i applied 12 volts to the pin i
thought was for the fuel pump,by identifying the wire colors in the wiring
diagram, the fuel pump ran. i found i have a broken piece inside the key
lock cylinder for actuating the different ignition switch positions and i
will fix this next.

 

Ok, I don't have the first thread you started on this vehicle. If you get a
chance get me the last 8 digits of the vin#. This key problem you are
having, were you experiencing this from day one when you first posted in I
think November?
The key cylinder is sold as a complete assembly. The part sells from 40$ to
125$ depending on part number.

Glenn

 

Hi!

It sounds like your meter was trying to autorange and could not do so in
time. Try setting it for a DC volts scale that is within the voltages you
are looking for instead of letting it automatically determine what scale to
use.

William