C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

clearing the codes ABS

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Old Dec 31, 2003 | 05:44 PM
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Default clearing the codes ABS

Took the 87 to a shop to check ABS. He said he could hear the start up sound in the box behind the drivers seat. He cleared the codes by crossing the main negative and positive for a second and drove the car. Since he cleared the codes and the light still remained on he figured it was a wheel sensor. He will do the Ohm test on each sensor.

Sounds funny to me shorting the electrical system to clear the codes. Couldn't that ruin my main computer?
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Old Dec 31, 2003 | 08:27 PM
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Default Re: clearing the codes ABS (kohlbear)

:cheers: Did he cross the wires when they were hot? Did it produce sparks?

That isn't the way to clear codes. If he simply removed both leads from the battery and touched them together, you have entered the world of OZ! Simply disconnecting one terminal from the battery and waiting a few minutes, clears the codes

:seeya
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Old Dec 31, 2003 | 10:22 PM
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Default Re: clearing the codes ABS (kohlbear)

Sounds funny to me shorting the electrical system to clear the codes. Couldn't that ruin my main computer?
It's my understanding that on that year, no codes are ever stored so there is nothing to clear. All tests are done at or near startup. If the problem is fixed, the light doesn't come on.

If I'm wrong, I'd appreciate someone correcting me.

Either way, I wouldn't let that guy touch your ABS system again.
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Old Jan 1, 2004 | 12:54 PM
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Default Re: clearing the codes ABS (Tourney3p0)

Correct.

Pre MY (Model Year)90 cars did not store codes. They monitored system performance and did not store codes.

At this point, I would get a service manual and follow the trouble shooting procedure.

dlmeyers 90 coupe zf6 3 speed shocks
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Old Jan 1, 2004 | 01:00 PM
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Default Re: clearing the codes ABS (dlmeyers)

there are some new cars that reset codes in that manner.

I don't think that doing it with the battery disconnected will do any harm... there is nothing happening, except some capacitors discharging...
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Old Jan 3, 2004 | 01:04 PM
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Default Re: clearing the codes ABS (jackdaroofer)

Well I removed every wheel sensor. cleaned it and checked for damage. They all tested around 1000 OHM value. I checked the Main fuse box and everything is ok on both brake related fuses. I checked the electrical connections on the hole behind the drivers seat. I used a test light on the abs module relay. The only problem there is the orange wire # 87 has no voltage, while the other two, except the ground are ok. I can hear it click when I turn on the key, but it turns on the abs light when I hit about 7 miles per hour. I hate to go to the dealer after all this work. Any ideas?
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Old Jan 3, 2004 | 06:14 PM
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Default Re: clearing the codes ABS (Tourney3p0)

Sounds funny to me shorting the electrical system to clear the codes. Couldn't that ruin my main computer?

It's my understanding that on that year, no codes are ever stored so there is nothing to clear. All tests are done at or near startup. If the problem is fixed, the light doesn't come on.

If I'm wrong, I'd appreciate someone correcting me.

Either way, I wouldn't let that guy touch your ABS system again.
If any **** mechanic did that to my car, I'd pop him! :yesnod: Crossing wires...sheeesh. By the way, just today I replaced both my rear sensors at a cost of $86 each. This sure cured my intermitten ABS problems. Not bad for an afternoon's work. 1. Get the parts online. 2. Jack up the rear. 3. Take both rims off. 4. Unbolt/detach the sensors. 5. Coat the new sensor with anti-seize ONLY at the cylinder part NOT the sensor tip. 6. Bolt in/attach the new sensors. 7. Blah, blah, put everything back together. 8. You're done, have a beer. :thumbs:
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