Turbo Dodge Forums banner

21 - 40 of 53 Posts

·
Premium Member
Joined
·
365 Posts
I believe that's what I did? I disconnected the 60 way, probed #13 and the other probe to ground. I show no resistance (open circuit) this is correct, right? Unless I'm misunderstanding you. I see the test is looking for a short to ground, and non was found
This should have showed the resistance for the TPS and MAP to ground, mine was approx 500 ohms. I assume the map and TPS are plugged in.
Something is up here cause f the MAP and TPS were not connected your scanner would report this as an error.
 

·
Premium Member
Joined
·
365 Posts
2 weird things. Modis shows 11.5 volts at test connection, battery is at 12 ( see pic) also, I can turn in the fuel pump from the modis ( through ASD) but when I go to actuate the ASD, nothing happens
I am OK with the 0.5V drop, this is likely due to the load of the scanner on the SCI connector. I do find the fuel pump experiment odd. I assume the blue/yellow stripe wire is now connected to the SMEC.
Did the ASD function of this scanner work in the past on a SMEC.
 

·
Administrator
Joined
·
24,342 Posts
Right now you are attempting to repair what is assumed to be a faulty controller.

When diagnosing a circuit all components and wiring are tested, if they check OK it is then assumed the controller is at fault.

You can test the ASD circuit as outlined in post #9 to determine if this is actually the case.
I am going to send you the 88/89 Code 42 diagnostics through PM, this will tell you what the issue is in the circuit.
 

·
Registered
Joined
·
29 Posts
Discussion Starter #26
Right now you are attempting to repair what is assumed to be a faulty controller.

When diagnosing a circuit all components and wiring are tested, if they check OK it is then assumed the controller is at fault.

You can test the ASD circuit as outlined in post #9 to determine if this is actually the case.
I am going to send you the 88/89 Code 42 diagnostics through PM, this will tell you what the issue is in the circuit.
As far as I know, I have run all test for code 42, but I'm willing to run what ever you send
I have solid power, solid ground to the SMEC, and all power/grounds to ASD relay. This is my second used SMEC, so I am stumped at this point. I took both SMECS apart looking for obviously damaged components, and none found. I don't want to junk the car. Thanks for your help
 

·
Registered
Joined
·
29 Posts
Discussion Starter #27
As far as I know, I have run all test for code 42, but I'm willing to run what ever you send
I have solid power, solid ground to the SMEC, and all power/grounds to ASD relay. This is my second used SMEC, so I am stumped at this point. I took both SMECS apart looking for obviously damaged components, and none found. I don't want to junk the car. Thanks for your help
I ran all the test again, for code 42, and it passed. All powers/grounds good to ASD relay

I did notice some tape on cavity 4 wire, looks like insulation is cracked. I don't have a new connection, so I am going to solder it, will that suffice?

I'm open to any other ideas, thanks for your help
 

Attachments

·
Administrator
Joined
·
24,342 Posts
I sent you the diagnostics.
Code 42 sets when the controller actuates the ASD and does not see voltage at Cavity #10 of the 60 pin connector.

Do you know what body style the 89 harness came out of?
 

·
Registered
Joined
·
29 Posts
Discussion Starter #30
I sent you the diagnostics.
Code 42 sets when the controller actuates the ASD and does not see voltage at Cavity #10 of the 60 pin connector.

Do you know what body style the 89 harness came out of?
I do not know exactly what it came out of, the guy who did it was 2 owners ago. Assuming a turbo 1989 lebaron. It ran for about 6 months when I got it going. It died twice originally, but would start right back up.

When it originally died for certain with the original smec, it had lost ASD actuation also at the blue/yellow wire also.
 

·
Registered
Joined
·
29 Posts
Discussion Starter #31
Update: I grounded the ASD to make it run

It ran for 30 min, than I turned it off. It wouldn't restart

ASD was providing power to everything
I used a noid light, light seems dim again, but during use it restarted

The 5v reference is at 4.9 at map and throttle position. I'm running it again. It defently starts harder than normal
 

·
Registered
Joined
·
29 Posts
Discussion Starter #32
This should have showed the resistance for the TPS and MAP to ground, mine was approx 500 ohms. I assume the map and TPS are plugged in.
Something is up here cause f the MAP and TPS were not connected your scanner would report this as an error.
The tps and map are reporting to the scan tool. Unplugging map causes a lope
 

·
Premium Member
Joined
·
365 Posts
Does your scan tool use the ASD line on the SCI connector? If so that may explain the differences it your two different test.
I do find it strange that the #13 is 5V at some times and 8V at others.
Perhaps you have a bad connection of your 60 way female pins. It could explain your issue.
here is a way to check.
How to test quality of 60 way female pins

Deoxit5 is a great product to clean up automotive electrical connections.
 

·
Registered
Joined
·
29 Posts
Discussion Starter #34
It's pi
Does your scan tool use the ASD line on the SCI connector? If so that may explain the differences it your two different test.
I do find it strange that the #13 is 5V at some times and 8V at others.
Perhaps you have a bad connection of your 60 way female pins. It could explain your issue.
here is a way to check.
How to test quality of 60 way female pins

Deoxit5 is a great product to clean up automotive electrical connections.
It's pin 52 that's at 9v, supposed to be 8. Map reference voltage has always been ok.

As far as how the snap on modis test the ASD, I have no idea unfortunately

I will check female pins again. I did clean them with the little deoxit I had left
 

·
Premium Member
Joined
·
365 Posts
It's pin 52 that's at 9v, supposed to be 8. Map reference voltage has always been ok.
OK good to know. I guess I misunderstood your previous comment above
"The only other weird think is the #13 5 volts is 8 volts and #52 is supposed to be 8v, and it's 9v. Not sure if that's normal"
 

·
Registered
Joined
·
29 Posts
Discussion Starter #36
OK good to know. I guess I misunderstood your previous comment above
"The only other weird think is the #13 5 volts is 8 volts and #52 is supposed to be 8v, and it's 9v. Not sure if that's normal"
Looks like I did say that...that 8v was not running. 4.9v was when it was running the last time. I will recheck that also

You ever put a noid light on one of these? Sure seems dim to me when running. Injectors ohm out ok, but I haven't ohmed them hot yet
 

·
Administrator
Joined
·
24,342 Posts
I do not know exactly what it came out of, the guy who did it was 2 owners ago. Assuming a turbo 1989 lebaron. It ran for about 6 months when I got it going. It died twice originally, but would start right back up.

When it originally died for certain with the original smec, it had lost ASD actuation also at the blue/yellow wire also.
The reason I am asking about the harness is that there are slight differences between AG/AJ and AA/AP body wiring.

You are "assuming" you have a SMEC issue and I believe in a logical diagnostic sequence.
I have to ask, before you manually actuated the ASD and had the car running where did the Code 42 diagnostics lead?

Now that the car will not start again, clear the codes, crank the engine for 7 - 10 seconds and see what codes return.
If Code 42 returns run the diagnostics.
 

·
Registered
Joined
·
29 Posts
Discussion Starter #38
The reason I am asking about the harness is that there are slight differences between AG/AJ and AA/AP body wiring.

You are "assuming" you have a SMEC issue and I believe in a logical diagnostic sequence.
I have to ask, before you manually actuated the ASD and had the car running where did the Code 42 diagnostics lead?

Now that the car will not start again, clear the codes, crank the engine for 7 - 10 seconds and see what codes return.
If Code 42 returns run the diagnostics.
The code 42 was present on both SMECS. I did run the diagnostics, another member provided them, and all led to no ground signal from smec ( no signal from the blue/yellow wire on the SMEC to the ASD, replace smec) all other circuits on the ASD relay and to the SMEC check out

When I put in the used 2 nd smec, I had that signal from the SMEC on the blue/yellow wire. It ran about 20 miles, and died in my driveway after idiling for about a minute, and would not restart. The blue/yellow wire had lost signal from the SMEC again. It did set a 42 after it died. This model needs to see voltage from actuated asd, if it doesn't, it sets a 42
 

·
Administrator
Joined
·
24,342 Posts
Apparently there is an issue in the ASD circuit that is killing the SMEC.

Have you checked the DB/Yl wire for a short to voltage?
Have you checked all controller ground circuits for shorts to voltage?

You are concentrating on the end symptom and not the cause of the issue.

I just went through this myself this weekend.
Two years ago the L/F caliper locked up.
It was frozen pins/slides.
Replaced all of the hardware, lubed it up and it was difficult getting the new metal bushings in, not remembering I assumed it was just a PITA to do and did not give it a second thought.
Friday driving to my Son's house the L/F caliper locked up again, I drove another 6 miles that way.
The issue was again frozen slides/hardware.
Bought new parts and attempting to install the new bushings into the rubber boots they would not go in no matter what I did.
Then it dawned on me that the issue was with the caliper itself.
I used my die grinder to remove all rust and scale from the caliper holes where the boots go in and now the pins go right into the boots and I can move the caliper back and forth with a finger.

The point of all of this is to find the initial cause of the issue, not the final result of the issue.
 

·
Registered
Joined
·
29 Posts
Discussion Starter #40
The reason I am asking about the harness is that there are slight differences between AG/AJ and AA/AP body wiring.

You are "assuming" you have a SMEC issue and I believe in a logical diagnostic sequence.
I have to ask, before you manually actuated the ASD and had the car running where did the Code 42 diagnostics lead?

Now that the car will not start again, clear the codes, crank the engine for 7 - 10 seconds and see what codes return.
If Code 42 returns run the diagnostics.
The few times I ran the flow chart for code 42, it led to replace smec. Everything is there except the signal on the blue/yellow wire

It only starts when I ground the blue/yellow wire. I will clear codes, and see if 42 returns and if it starts when I remove the ground from the ASD relay.
 
21 - 40 of 53 Posts
Top