Code 36
Thread Starter
Team Owner
Joined: Mar 1999
Posts: 89,144
Likes: 3
From: Life's tough, wear a helmet.
Code 36
OK - I've been experiencing some code 36 issues lately. On Sunday I cleaned the TB and made sure the connection to the MAF was secure. I cleared the codes and all was fine for some short trips on Monday. Tuesday I drove to work and all was still fine. But about 10 seconds after I started the car for the drive home the SES light came on. I pulled out my handy paperclip and sure enough it was code 36 again. :mad:
So I got out my service manual. It recommends doing what I already did. But if that doesn't work there is a handy flowchart for testing. Cool.
Step 1 is to clear the codes (no problem) start the car and let run until system goes "closed loop."
Huh?
The rest of step 1 I can handle, but how do I know when it goes "closed loop?"
Step 2 is to disconnect the MAF sensor burnoff relay (which I suspect is probably the problem anyway). Fine. I gave it a little tug but I'm not sure exactly how much of this is supposed to come out.
Any ideas? I unhooked the gray clip and tried to pull up. No go. But now I notice that there is a black clip down on the right side. Does that unhook, too? Or do I just need to pull harder after I unhook the gray one?
Once I get this off I have to test ckts 340 with a test light.
I'll go on from there.
I hate PITA problems like this.
So I got out my service manual. It recommends doing what I already did. But if that doesn't work there is a handy flowchart for testing. Cool.
Step 1 is to clear the codes (no problem) start the car and let run until system goes "closed loop."
Huh?
The rest of step 1 I can handle, but how do I know when it goes "closed loop?"
Step 2 is to disconnect the MAF sensor burnoff relay (which I suspect is probably the problem anyway). Fine. I gave it a little tug but I'm not sure exactly how much of this is supposed to come out.
Any ideas? I unhooked the gray clip and tried to pull up. No go. But now I notice that there is a black clip down on the right side. Does that unhook, too? Or do I just need to pull harder after I unhook the gray one?
Once I get this off I have to test ckts 340 with a test light.
I'll go on from there.
I hate PITA problems like this.
Thread Starter
Team Owner
Joined: Mar 1999
Posts: 89,144
Likes: 3
From: Life's tough, wear a helmet.
Re: Code 36 (Vic'89)
The Parts and Illustrations manual lists both parts as #14089936, as indicated in the picture above.
Any reason to believe that is not correct?
Any reason to believe that is not correct?
Burning Brakes
Joined: Dec 2000
Posts: 1,161
Likes: 0
From: Orangeburg, NY
Re: Code 36 (Scoob)
As VIC'89 recommends, change the relays. They have a tendency to get carbon build-up inside the relay, causing the problem you mentioned. They are cheap and easy to replace
Le Mans Master
Joined: Aug 2000
Posts: 5,192
Likes: 1
From: Airport Cruise-in 1 Veteran Airport Cruise-in 2 Veteran
Cruise-In II Veteran
Re: Code 36 (Scoob)
The Parts and Illustrations manual lists both parts as #14089936, as indicated in the picture above.
Any reason to believe that is not correct?
Any reason to believe that is not correct?
Safety Car
Joined: Feb 2002
Posts: 4,212
Likes: 10
From: Sun City West Az
Re: Code 36 (Scoob)
An easy way to know when the ECM goes closed loop is that the fan will turn off. (after cold start up and you haven't reworked your fans)).....and it should go closed within 4 minutes after start up. In Closed Loop the ECM is using the O2 sensors to provide correct fuel delivery. Hope this helps.
Thread Starter
Team Owner
Joined: Mar 1999
Posts: 89,144
Likes: 3
From: Life's tough, wear a helmet.
Re: Code 36 (ittlfly)
An easy way to know when the ECM goes closed loop is that the fan will turn off. (after cold start up and you haven't reworked your fans)).....and it should go closed within 4 minutes after start up. In Closed Loop the ECM is using the O2 sensors to provide correct fuel delivery. Hope this helps.
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Thread Starter
Team Owner
Joined: Mar 1999
Posts: 89,144
Likes: 3
From: Life's tough, wear a helmet.
Re: Code 36 (champs_97)
If you got a minute could you explain this paperclip process to me? :confused:
'94-'95 are also OBD-I but they use the OBD-II style ALDL. You must have a real code scanner to pull codes from this type of ALDL. '96 C4s are fully OBD-II and also require a code scanner.
http://www.c4vettes.com/ecm.htm
