Q James, I accept a 1988 Corvette Tuned Port Injection (TPI) that about sets a cipher 36: a accumulation airflow (MAF) sensor action fault. I accept replaced the Electronic Control Module (ECM), the accumulation airflow sensor, accumulation airflow sensor broadcast and the accumulation airflow sensor burn-off relay. I accept additionally gone through the browse affection and the analytic aids with no resolution.
Most times I can alpha the car algid and drive afterwards a code, again back I shut off the car and restart it the cipher will arise appropriate abroad or anon after. Your admonition and admonition would be abundantly welcomed.
Thank you, Mike
A Mike, this is not an aberrant problem, accountability cipher 36 is for the burn-off action of the accumulation airflow sensor.
My aboriginal catechism is are you application an bashed blazon air clarify on the vehicle? If so, the aboriginal affair I would do is aish this clarify and install a banal filter, bright the accountability cipher and see if the accountability returns. I accept apparent these bashed blazon air filters not bankrupt accurately or over-oiled afterwards cleaning.
If the air clarify is not the botheration the best accepted account for this accountability cipher is one of the two relays. Back blockage these relays accomplish abiding there are no austere or broiled areas area they are connected.
Another accepted abortion is the Electronic Control Module (ECM) with allotment cardinal 1227165. If your ECM has this allotment cardinal it possibly could be faulty. Before replacing the ECM analysis for any added problems.
How the System Works
After the agent has been active for about 15 account and again you shut the agent off, the oil burden drops, which de-energize the accumulation airflow sensor ability relay.
Shortly afterwards that occurs the Electronic Control Module sends a arena to the accumulation airflow sensor burn-off broadcast that energizes the relay.
This closes the switch, which applies 12 volts to the burn-off relay.
At the aforementioned time 12 volts is additionally activated to the accumulation airflow sensor ability broadcast and again ability is beatific to the sensor.
Visual System Test
After active the agent for a minimum of a 10 minutes, back you shut the agent off the burn-off action will enable. Twelve volts will be beatific to the hot wire analysis aspect authoritative it afterglow red to “burn off” any contagion that may be ashore to the wire.
You can analysis this action in a few altered ways. The adjustment that requires no accoutrement or animating the relays is simple:
Expose the accumulation airflow sensor in the airbox area you can calmly appearance it while the sensor is still absorbed up.
Let the agent abandoned for about 15 minutes.
Have addition shut off the agent while you are attractive central the airbox at the accumulation airflow sensor.
You should see the wire in the centermost of the accumulation airflow sensor afterglow red aural a brace of account of the agent actuality shut off.
If the accumulation airflow sensor does not afterglow red aural a brace of account of the agent actuality shut off analysis to see if the relays are applying voltage to the accumulation air breeze sensor. These two affairs are calmly apparent in a base diagram of the vehicle.
Mike, your wire blush should be aphotic dejected and the purple. Analysis to see if these affairs accept 12 volts at the accumulation air breeze sensor application a multimeter. This voltage will alone be activated for about 5 to 30 abnormal afterwards the agent has been shut off afterwards active for almost 15 minutes. Note these wire colors may alter for the year, accomplish and archetypal of the agent you are alive on. Analysis your account chiral to ensure you are alive with the actual wires.
If voltage is not present or alone present for an instant, I would analysis the accomplishments ambit to accomplish abiding that the arena to the burn-off broadcast is constant. I accept apparent several problems with this accomplishments ambit not authoritative a acceptable ground. Additionally analysis to see if the relays are accepting voltage, arena and a arresting from the ECM.
Mike, if aggregate checks out acceptable I accept additionally apparent the base burst internally area the accumulation airflow sensor plugs into the base harness. You can usually cull on the affairs one at a time and if any of the affairs feels elastic, like a elastic band, use your multimeter to analysis for an accessible circuit. There is an aftermarket adjustment complect for this problem. Well, I achievement this helps. Acceptable luck and let me apperceive what the botheration was.
Photography by James Berry
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