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I tried using the paper clip, no light. So bought Innova 3123, Plugged it in, no light. The Service Engine Soon light comes on when I turn the key to start. Anyone know where the wires for the outlet go under the dash? How could it be dead? Doesnt it go to the ECM?
I tried using the paper clip, no light. So bought Innova 3123, Plugged it in, no light. The Service Engine Soon light comes on when I turn the key to start. Anyone know where the wires for the outlet go under the dash? How could it be dead? Doesnt it go to the ECM?
Car needs to be 'NOT RUNNING' I'm quite sure - Are you attempting to check with car running or NOT? Take your code reader to another car and see if it( works. If it(YOUR CAR) passes the BULB CHECK and you have NO CEL running I don't know that the reader you have will flash the 12 - I'm not familiar at all with your reader.
Jumper B to a known good ground. Perhaps the A terminal 'ground' has failed. How likely? I'd think quite likely.
In the FSM there's diagnostics for NO ALDL - see 6E3-A-12
Car needs to be 'NOT RUNNING' I'm quite sure - Are you attempting to check with car running or NOT? Take your code reader to another car and see if it works. If it passes the BULB CHECK and you have NO CEL running I don't know that the reader you have will flash the 12 - I'm not familiar at all with your reader.
Jumper B to a known good ground. Perhaps the A terminal 'ground' has failed. How likely? I'd think quite likely.
Yes just turning key one click, I will try another ground. I dont have another obd1 car to test the reader. I just bought it in the original packaging.
Yes just turning key one click, I will try another ground. I dont have another obd1 car to test the reader. I just bought it in the original packaging.
I was adding to my post while you did this entry. See my edit and I'd think you would have little trouble finding a GM older than '94 to TEST the READER.
***Older than '94 assures the car will have an OBD1 pinned ALDL.
Yes just turning key one click, I will try another ground. I dont have another obd1 car to test the reader. I just bought it in the original packaging.
Turn the key all the way on so the dash lights up just don't start the car. It will not communicate unless you do it has the establish a link with the cars computer.
If the paperclip on A-B on the odb1 connector and ignition on, not started doesn't display a code 12 at the very least, there is a problem with the ECM or other items.
Code 12 on an '87 indicates ALDL is working.
I'd get into the FSM 6E3 section and chase tests for ECM.
From what I read the Inova 3123 is really just a fancy paper clip. When you connect it you turn the key on and the codes are still retrieved by watching the light flash.
I'm going to add this because I had all kinds of problems getting the paper clip to work when I first tried it. I knew I was doing it right but it didn't work. I even ohm checked the paper clip. That's when I figured out I had a coated paperclip. The coating acted as an insulator.
so just tried another ground, nothing. also did a continuity test for the A plug. It is deffinatly grounded. Also the bottom left plug is ground. Leading me to think plug B has something wrong with it. Im going to look into the FSM 6 area as stated above.
PS, who ever designed these cars needs to be shot if he isnt dead alreadly.
so just tried another ground, nothing. also did a continuity test for the A plug. It is deffinatly grounded. Also the bottom left plug is ground. Leading me to think plug B has something wrong with it. Im going to look into the FSM 6 area as stated above.
PS, who ever designed these cars needs to be shot if he isnt dead alreadly.
only thing im seeing on the guages is the oil press is fluctuating in the 60s. maybe the sending unit is bad.
A is a good ground. Ran a wire from a known good ground, still no SES light. The following pics are with a meter on B with key off and key on. Not sure really what it means. Dont think it means that B is a ground short.
Only other test I didnt do is removing the ECM plugs, cause I couldnt figure out how to get them, or one, not sure if I have to remove both. And if I need to dissconnect batt first.
If this test comes out how I think it will, it says replace Mem-Cal, something to do with the ECM.
Not sure if I want to go there or just junk the car.
You should use a DVOM or digital volt ohm meter. Disconnecting negative battery cable minimizes risk of voltage spikes when connecting and disconnecting modules.
With further test today, it looks like the overvoltage from the bad neg at the battery, the computer most likely got toasted. There are some on eBay but don’t know that I trust them. Quality Auto Parts said they can get me one for $350 shipped.
Was working on the ABS last weekend, had to run the car as part of the test. Not showing any SES now. Hoping a test drive this coming weekend will not show the SES. Got the ABS fixed I hope.
St. Jude '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-‘19-'20-'21-'22-'23-'24
Originally Posted by SuperDave02
so just tried another ground, nothing. also did a continuity test for the A plug. It is deffinatly grounded. Also the bottom left plug is ground. Leading me to think plug B has something wrong with it. Im going to look into the FSM 6 area as stated above.
PS, who ever designed these cars needs to be shot if he isnt dead alreadly.
2018-1987=31 year old technology.... Yeah the guy is probably dead.
04-20-2018, 07:26 AM
No info from ALDL
Hoping a test drive this coming weekend will not show the SES. Got the ABS fixed I hope.
