I have an 88 IROC, it has the 305 tpi engine in it, and 63,000 original miles.. but the car has sit for a good period of time.
When I first got the car there were no lights that I saw and the car ran great. There were a couple of things I wanted to address so it began. The instrument cluster had a couple of burnt out lights so with the help of a friend we pulled the cluster and replaced all the bulbs in it... in the process we noticed the check engine light had been removed.. *OHHHH NO* So i'm fully expecting to get the light on when we get everything back together.. sure enough, new bulb worked great!!! I checked the codes and came up with 1 for the TPS and 3 for the MAF.
The same friend pointed out to me that there were 2 relays that power the MAF so I thought .. nice... much better than $162 bucks for a new one.. so I got the TPS put it on, and that code went away. Then I got the power relay for the MAF and lost 2 codes for the MAF 34 and ? (can't remember the 2nd right off)
That left me with code 36 to deal with.

Code 36 lists that the ECM has detected a failure in the MAF burnoff function, or in the related wiring connectors. *so says the autozone print out.* The second relay I mentioned above was for just that, so I replaced it. I still had light, so I broke down and dropped the $162 for a new MAF thinking surely this would solve my problem, but it only got worse.. I have now replaced all 3, I am still gettting intermittent code 36.. sometimes when I get in the car, the light will be on.. sometimes it's not.
And in the process I lost the cooling fan. That is another thread.. but further down in the autozone print out it mentions that there may be a fuse that also controls the MAF burnoff function.. I have looked in the fuse box and the wires as far as I can track them without stripping the harness and there is no hint of a fuse.

**questions**

Does anyone know where this fuse is located?

Is there anything else that I am missing short of replacing the ECM or stripping the harness?

 

Forget about tearing into the wiring harnes for now. You'd likely be wasting your time. You need to check the MAF burn off relay function instead.

You'll need a voltmeter.

• Clear codes.
• Ground diagnostics terminal.
• Start engine and wait for the check engine light.
• Unground terminal.
• Shut off car.
• Wait a minute or so.
• Restart car for 20 seconds or until check engine light comes on.
• Shut off car.
• Turn ignition to ON position.
• Check for codes.
• No code, problem intermittent.
• Code 36, unplug burnoff relay, check both orange wires for power.
• If one or both have no power, repair open circuit.
• If both orange wires have power, reconnect relay.
• Disconnect MAF sensor.
• Ground burnoff relay black wire, terminal "F".
• Check MAF connector terminal "D" for power.
• If no power, replace burn off relay.
• If it has power, with relay terminal "F" still grounded, check MAF plug terminal "E".
• If no power, replace MAF power relay.
• If terminal "E" has power, disconnect burn off relay.
• Check burnoff relay black wire (terminal "F") for power.
• If it has power it is shorted to power somewhere. If it has no power, suspect ECM or ECM connector.
• Code 36 can be caused by a bad connection at either relay.
• Check relay connector contacts for corrosion and tight fit before replacing ECM.

That's from the service manual. It might get you closer to the problem. One key is that BOTH relays need to be intact. The MAF signals the ECM and must get power through the normally closed sontacts of the MAF Power Relay during the burn off cycle, so the MAF power relay is still a suspect.