Airbag sensor light on - Toyota Nation Forum : Toyota Car and Truck Forums
Corolla 7th Generation (1993-1997) Specific discussion of the 7th generation

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post #1 of 22 Old 07-09-2019, 03:36 PM Thread Starter
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Airbag sensor light on

My airbag light comes on and stays on.
The manual says the center airbag sensor stores fault codes. I am wondering how to check the codes stored in the center airbag sensor?
Do you get a regular code reader and plug it in under the dash?
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post #2 of 22 Old 07-09-2019, 04:49 PM
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What year Corolla?

1995 A131L 4AFE Toyota Corolla
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post #3 of 22 Old 07-09-2019, 08:44 PM
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This thread might help you. It has instructions for clearing codes, but the OP had a 1993. Have you ever spilled anything down by the parking brake? The air bag computer is close to it.



https://www.toyotanation.com/forum/1...ght-reset.html
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post #4 of 22 Old 07-09-2019, 10:49 PM
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I tried it and it worked for me my light is reset
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Last edited by DM209; 07-09-2019 at 11:05 PM.
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post #5 of 22 Old 07-10-2019, 04:43 PM Thread Starter
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1996
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post #6 of 22 Old 07-10-2019, 05:00 PM Thread Starter
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I'm not looking to clear any codes just yet. I want to retrieve the stored codes first so i can address why the light is on in the first place.
I have not spilled anything on the brake, no.
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post #7 of 22 Old 07-11-2019, 03:12 PM
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This is how my 1997 Toyota Repair Manual says to retreive the codes.

(a) Turn ignition switch to ACC or ON position and wait approx. 20 sexonds.

(b) Connect terminals Tc and E1 of the DLC1. (You can use a bent paper clip to do this. The DLC1 is a little connector located near the left front strut tower under the hood. You open the cover and the terminals are labeled on a sticker on the underside of the cap.)

NOTICE: Never make a mistake with the terminal connection position as this will cause a malfunction.

Once you do this, the airbag warning light will flash out 2-digits codes. For example code 31 would be 3 flashes, a 1.5 second pause, then 1 flash. Then a 2.5 second pause followed by the next 2-digit code. There will be a 4 second pause before the codes repeat.

Report back your codes.

1990 Corolla DX sedan, 4A-FE, 3-speed auto A131L
233,000 miles and counting...

1997 Corolla DX sedan, 7A-FE, 4-speed auto A245E
214,000+ miles
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post #8 of 22 Old 07-12-2019, 11:38 AM Thread Starter
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It came back with a 31 code.
The light doesn't come on everytime i start the car. Its only occasionally. I am wondering if it has anything to do with the driverside seatbelt? If I put my seatbelt on during the dings just after I start the car the light goes off. If I put my seatbelt on before I start the car or after the dings are done it stays on.
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Last edited by Mamameep96.; 07-12-2019 at 12:31 PM.
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post #9 of 22 Old 07-12-2019, 12:29 PM
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DTC 31 - Center Airbag Sensor Assembly Malfunction

Was that the only code? The FSM states that if it's output in conjunction with any other code you should address the other code first and reset, then retest to see if 31 also went away.

It's not very helpful on what to do if not, other than "replace center airbag sensor assembly".
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post #10 of 22 Old 07-12-2019, 12:33 PM Thread Starter
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No there was no other code.
The light doesn't come on everytime i start the car. Its only occasionally. I am wondering if it has anything to do with the driverside seatbelt? If I put my seatbelt on during the dings just after I start the car the light goes off. If I put my seatbelt on before I start the car or after the dings are done it stays on.
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post #11 of 22 Old 07-12-2019, 12:44 PM
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Weird. Maybe some issues with wiring harness? Perhaps pop off center console and check connections, test for ground continuity, etc.
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post #12 of 22 Old 07-12-2019, 12:49 PM Thread Starter
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How do I check for test for ground continuity?
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post #13 of 22 Old 07-12-2019, 01:01 PM Thread Starter
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Maybe I just needed to threaten my car with tools.
I turned the key on and off over 10 times in case the computer needed to log the error multiple times before the light stayed on. It has stayed off so far.
I'll keep you posted on whether it comes back on or not.

It's the ghost light!! ha ha ha
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post #14 of 22 Old 07-12-2019, 01:20 PM
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Heh. My bet is it will be back. Intermittent issues are challenging to diagnose and they never "just go away" unfortunately. You're on the right track though trying to find what pattern might trigger it, if any.

As it pertains to ground continuity what I was after is whether one of the wires had insulation issues and somehow touching ground when it shouldn't. You'll need a good wiring diagram and an ohm-meter. DannoXYZ is the electrical gremlin chaser here so I'm sure he's got a ton of other suggestions for how to track this down.
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post #15 of 22 Old 07-12-2019, 04:58 PM
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Yes, code 31 is airbag sensor assembly malfunction. The troubleshooting steps are to check for voltage at the IGN (powered from IGN fuse) and ACC (powered from CIG fuse) terminals of the airbag sensor assembly. (You'd need some diagrams to do this.)

After that it says to clear the code then turn key from LOCK to ACC or ON at least 5 times, waiting 20 seconds between each position. Then recheck for codes.

If the code comes back, replace airbag sensor assembly.

But it could be an intermittent wiring problem like 94RollaDad mentioned.

1990 Corolla DX sedan, 4A-FE, 3-speed auto A131L
233,000 miles and counting...

1997 Corolla DX sedan, 7A-FE, 4-speed auto A245E
214,000+ miles
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