Trouble Code 36

[jgmotto]

I have had an SES Code 36 for some time now. I haven't noticed any performance problems. In reading some of the threads on this code, I understand that I should check the MAF relay and MAF burnoff relay. My question is, where are they located on a 1989 C4? I found 2 relays behind the battery. One is the fuel pump relay (it clicks when I put 12v on terminal G). The other one should be either the MAF relay or the MAF burnoff relay. It checks out OK. Where is the other one located?

 

[Magmotor]

#17 & #18 is what your looking for...17 is the MAF Sensor........

 

[jgmotto]

Thanks, Mag. You are absolutely right. The fuel pump relay is actually over at position 3. I checked the wire colors going to these two relays and they match my wiring diagram. Both relays seem to bench check ok. I cleared the code, so we'll see if the SES light comes back on or not.

 

[RedRagTop]

May as well do the relays, they are cheap and suggested preventative maintenance...

 

[86PACER]

This site will come in handy for future code clearing, if you have not already seen it.

http://www.c4vettes.com/ecm.htm

 

[HPG]

This site will come in handy for future code clearing, if you have not already seen it.

http://www.c4vettes.com/ecm.htm

The two behind the battery on my 88 are MAF power and burn off relays. Both have the same part number. When I replaced them, I stopped getting the Check engine light. Only cost $20 from a GM dealer. A lot cheaper than the MAF sensor. I've heard some problems when using a K & N filter with too much oil. I coats the sensor wires and causes problems. Carb cleaner works to clean them.