No spark - engine doesn't start

1988 CHRYSLER LE BARON
78,914 MILES • 2.2L • 4 CYL • 2WD • AUTOMATIC
Avatar
LEBARON100%
  • MEMBER
  • 13 POSTS
Hello,

I have a 1988 Chrysler Le Baron 2,2 turbo cabrio and I already bought it broken (thought it was gonna be easy to fix it and enjoy the car) and I have no more ideas what could that be.

The engine won't start, there is no spark. I receive the error code 54 and have no more ideas for it.
The starter is ok, it's cranking, but the engine will not engage.
The fuel pump relay seems to be working, as I can feel it "click" on when the key is turned to start the car. I also hear it working when I stand close to the tank. Fuel filter looks like it must have been replaced recently.
I have the power module and the turbo logic module as 2 separate parts (as in 86-87 models).

It happened few times that the engine started while cranking, then it worked for a while and turned off suddenly. I even got it once working for like an hour and then I had to tug it back home. So sometimes something happens and the spark shows up, but it happened only like 5 times.


Already tried:
Replaced pickup sensor under the distributor cap for a new one.
Replaced the ignition coil for a new one.
Checked fusible links: they are ok.
Checked all wires: they are ok.
Checked on the two small wires on the back of the alternator during engine cranking: one of them has full battery voltage.
Checked the map sensor: it is ok.
Removed the rubber from the inside of the power module, checked all of the connections: they are ok.
Replaced one of transistors in the power module for a new one.
Remove the distributor cap and watch if the rotor turns during cranking: it does turn

The computer might have been already replaced once because there is written: "81 dodge b4 600"


I think it could be the logic module, but before replacing it I want to be 100% sure that I checked every other possibility, because it is an expensive adventure.

I will appreciate every useful hint, hoping for finally getting it repaired.
Mar 26, 2016 at 3:24 PM
Advertisement
Avatar
HMAC300
  • CERTIFIED EXPERT
  • 48,601 POSTS
there is no code 54 however there is a code 53 which means the smec is bad see pics for diagnosis also make sure your auto shutdown relay is good.
Mar 26, 2016 at 3:45 PM
Avatar
LEBARON100%
  • MEMBER
  • 13 POSTS
Thank you for you quick answer!

There must be the code 54, I counted it many many times and it is always 54.

I don't have SMEC as cars built in 88-89, I have power module and logic module in 2 separate parts.
Power module has two sockets, one 10-pin, second 12-pin and is located unter the hood.
Logic module has two sockets, 25 pins each, one blue, one red and is located next to passenger's feet.

Doesn't it mean that my ASD relay works, if I can hear the fuel pump working? If not, how to check it then?
Mar 29, 2016 at 5:52 AM
Advertisement
Avatar
HMAC300
  • CERTIFIED EXPERT
  • 48,601 POSTS
our site under electrical tells how to check a relay or type in search engine how to check a relay. as far as a smec our manual shows one on lh front fender but i'mnot gonna argue the point car is to damn old. see pics for diagnosing code 54
Mar 29, 2016 at 6:04 AM
Avatar
LEBARON100%
  • MEMBER
  • 13 POSTS
I've checked ASD relay - it is working fine.

It may be possible that my car was built in 1987 (like in December) but registered in 1988, that would explain why it has the logic module from older models.

I diagnosed code 54 according to your screenshots, I have around 8 Volts on both connectors (No. 1 and No. 2) which would mean broken distributor sync pick-up, but I have just replaced it for a brand new one.
Is it possible that a brand new part is broken? I am sure it didn't get broken while being installed. The rotor spins when cranking the engine.

Can we have here some other issue?
May that be some wire or can it be the logic module failure?
Mar 31, 2016 at 1:03 AM
Avatar
HMAC300
  • CERTIFIED EXPERT
  • 48,601 POSTS
there should be a production date on your car, if spark goes to dist then it's either the rotor or dist cap. if you don't have the correct system on your car then the part may be incorrect did you check the wire going to smec? that may be frayed or grounding out. it may be your logic board is bad as well. or your pickup is a cheap one and not made to specs. a lot of Chinese junk is like that.
Mar 31, 2016 at 6:08 AM
Avatar
LEBARON100%
  • MEMBER
  • 13 POSTS
Maybe I should double-check the installation as the error indicates the camshaft position sensor? I mean the wiring from the camshaft sensor plug to the ECU plug

But where can I get the diagrams from? I tried to find some in the internet but there were none. Do you have any?

+ If the rotor spins while cranking the engine, can it still be bad?
Apr 1, 2016 at 4:07 AM
Avatar
HMAC300
  • CERTIFIED EXPERT
  • 48,601 POSTS
if there is no spark to dist and rotor turns and none to plugs then either a rotor or dist cap. as long as it spins the sensor should work. Blk/ lt blu powers other sensors
Apr 1, 2016 at 7:05 AM
Avatar
LEBARON100%
  • MEMBER
  • 13 POSTS
I've just checked the voltage on the ignition coil:
after turning the ignition switch it's 0,7 V less than the battery voltage for one second
BUT it's gone when cranking the engine, it's 0,2V then.

The ASD relay is turning on for 1 second when turning the ignition switch.

About the year of production: the nameplate is in German, but on the windows there's 87.

I told you I don't have 60-pin SMEC. All of the screenshots you attached are for 88.

Apr 1, 2016 at 10:46 AM
Avatar
HMAC300
  • CERTIFIED EXPERT
  • 48,601 POSTS
here iis one from an 87 which in previous replies I asked for a production date which you did not give. happy hunting
Apr 1, 2016 at 12:03 PM
Avatar
HMAC300
  • CERTIFIED EXPERT
  • 48,601 POSTS
here's more I hate this new system
Apr 1, 2016 at 12:07 PM
Avatar
HMAC300
  • CERTIFIED EXPERT
  • 48,601 POSTS
more too
Apr 1, 2016 at 12:08 PM
Avatar
LEBARON100%
  • MEMBER
  • 13 POSTS
Thank you,

unfortunately it is still not working.
I don't know what else could I check, starting to become hopeless.
Apr 19, 2016 at 4:39 AM
Avatar
HMAC300
  • CERTIFIED EXPERT
  • 48,601 POSTS
i have no other suggestions/comments.
Apr 19, 2016 at 6:00 AM
Avatar
LEBARON100%
  • MEMBER
  • 13 POSTS
Hello after long long time,

I solved the problem - bought a new logic module and after its replacement the car is all fine!
Jun 26, 2017 at 9:07 AM
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,855 POSTS
Glad you could get it fixed, that kind of problem can be tough. Please use 2CarPros anytime we are here to help

Cheers, Ken
Jun 28, 2017 at 5:30 PM
Avatar
LEBARON100%
  • MEMBER
  • 13 POSTS
Hello again Ken!
I was happy too soon - after few days of driving something caused the same thing again: no spark, no start, but no flash codes either.
Can it be that something burnt the new logic module? It happened after the engine reached a very high temperature.

Can you please advice what could make the new logic module broken?

I already ordered another one but I don't want to put it in before I am sure it won't get broken again - this would be the third already.

Almost hopeless thanks in advance,
Paulina
Jun 30, 2017 at 1:12 AM
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,855 POSTS
Hello,

I would try changing the engine temperature sensor, it sounds like it is shorting out.

Here is a guide that will help show you what you are in for when doing the job and a diagram (below) on it location on your car.

https://www.2carpros.com/articles/coolant-temperature-sensor-cts-replacement

Please let us know what happens.

Cheers, Ken
Jun 30, 2017 at 10:56 AM
Avatar
LEBARON100%
  • MEMBER
  • 13 POSTS
Hello Ken,
thank you for advice!
I measured the resistance of the present coolant temperature sensor and it is 12 000 ohms so I assumed there is no short circuit. Should I replace it anyway?

Many thanks for helping me out!
Cheers,
Paulina
Jul 4, 2017 at 7:45 AM
Avatar
HMAC300
  • CERTIFIED EXPERT
  • 48,601 POSTS
I made a mistake in our manual they don't list code 54 but I went to a different area and found code 54 it's a distributor problem see pics for tests to do to diagnose this. if it leads to what is called a smec that is the computer as faulty. follow tests in order of pics.
Jul 4, 2017 at 8:09 AM
Avatar
LEBARON100%
  • MEMBER
  • 13 POSTS
Hello again,

thank you for joining again, but the 54 error is long gone - it disappeared after I installed a new logic module. I also told you already that in my car there is NO 60-pin connector, because my car appears (after decoding VIN) to be made in 1987. 60-pin connectors were present in later models.

Now my problem is that I can't run the engine although it cranks, I don't have any flash codes and for me it looks like I have to replace logic module again. But why?

Thanks in advance!
Jul 5, 2017 at 2:37 AM
Avatar
HMAC300
  • CERTIFIED EXPERT
  • 48,601 POSTS
because between 87 and 88 Chrysler may have changed the logic module if you got this from an auto parts take the receipt they should take it back. also they do stuff like that during production and have early/late build cars.
Jul 5, 2017 at 6:12 AM
Avatar
LEBARON100%
  • MEMBER
  • 13 POSTS
I know. I bought a correct logic module, exactly the one that I should. And after few days of running it got broken again (I think) - no flash codes anymore, but the car won't start. I ordered another one (also correct for my vehicle) but I am afraid that it will get broken again when I drive few days. The question is what could cause it again?
Jul 6, 2017 at 11:54 AM
Avatar
HMAC300
  • CERTIFIED EXPERT
  • 48,601 POSTS
check for wires rubbing against the body due to age of car may be shorting out.
Jul 6, 2017 at 12:03 PM
Avatar
LEBARON100%
  • MEMBER
  • 13 POSTS
After long diagnosing it occured that the ignition coil has got broken after overheating the car. I replaced it and now it's working fine since few days. It took me 2 years to get the LeBaron going, but I finally did! :) Thanks for help and advices.

Cheers,
Paulina
Jul 19, 2017 at 6:03 AM
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,855 POSTS
Nice work, we are here to help, please use 2CarPros anytime.

Cheers, Ken
Jul 19, 2017 at 11:00 AM