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

Lateral Accelerometer

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Old Jan 17, 2008 | 07:59 PM
  #21  
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I was under the assumption that what Firstvette2 said was correct. My abs works fine in a straight line or a slight turn, but under a heavy turn it's not there, just skids and slids. Joe
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Old Jan 18, 2008 | 12:47 AM
  #22  
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Out of the 90 Corvette FSM
Looked in the trouble codes for ABS, I will look further if anyone doesn't like this answer. It's pretty plain what the Lateral Accelerometer is used for.

Code 76
Circuit Description
The lateral accelerometer circuit provides a signal to the EBCM which reflects the severity of a vehicle turn. This information is used by the EBCM to modify the control of the rear wheel brakes to help prevent loss of control in a turn due light brake pedal application at speeds above 50 km/h (30 mph). Code 76 will be set when the accelerometer signal is greater than 0.6g for 120 seconds or more.

My interpretation of this is that if you lightly apply the brakes in a hard turn and the rear tires break loose, the ABS will try to stop this from happening. It will prevent rear brake lockup in a hard turn, trying to control a skid of the back end.

It doesn't appear to prevent control of the normal application of the ABS to the front wheels.

Code 75 5E1-47
Lateral Accelerometer (short to B+ or ground, or open circuit)

Wiring Diagram 5E1-7



General Description 5E1-2 last paragraph
Brake pedal pulsation and occasional tire "chirping" are normal during ABS operation on dry pavement. Also, during light braking in a turn, the rear brake pressure may be modulated to enhance vehicle stability under certain conditions. A slight brake pedal vibration during light brake pedal apply is normal during lateral acceleration levels above 0.6g's and speeds above 50 km/h (30 mph).

Found this above. this ought to be enough.

All information Quoted from 90 Corvette FSM.
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Old Jan 19, 2008 | 11:55 AM
  #23  
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Originally Posted by johnnyevans
Out of the 90 Corvette FSM
Looked in the trouble codes for ABS, I will look further if anyone doesn't like this answer. It's pretty plain what the Lateral Accelerometer is used for.

Code 76
Circuit Description
The lateral accelerometer circuit provides a signal to the EBCM which reflects the severity of a vehicle turn. This information is used by the EBCM to modify the control of the rear wheel brakes to help prevent loss of control in a turn due light brake pedal application at speeds above 50 km/h (30 mph). Code 76 will be set when the accelerometer signal is greater than 0.6g for 120 seconds or more.

My interpretation of this is that if you lightly apply the brakes in a hard turn and the rear tires break loose, the ABS will try to stop this from happening. It will prevent rear brake lockup in a hard turn, trying to control a skid of the back end.

It doesn't appear to prevent control of the normal application of the ABS to the front wheels.

Code 75 5E1-47
Lateral Accelerometer (short to B+ or ground, or open circuit)

Wiring Diagram 5E1-7



General Description 5E1-2 last paragraph
Brake pedal pulsation and occasional tire "chirping" are normal during ABS operation on dry pavement. Also, during light braking in a turn, the rear brake pressure may be modulated to enhance vehicle stability under certain conditions. A slight brake pedal vibration during light brake pedal apply is normal during lateral acceleration levels above 0.6g's and speeds above 50 km/h (30 mph).

Found this above. this ought to be enough.

All information Quoted from 90 Corvette FSM.
Based on what your saying I guess my ABS Lateral sensor was working properly. I was in a hard turn with the rear end loose with light brake pressure. Thanks!!
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Old Jan 19, 2008 | 12:18 PM
  #24  
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If you want the rear brakes to stay applied in lateral acceleration ... use the emergency brake!
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Old Dec 12, 2013 | 08:01 AM
  #25  
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Originally Posted by johnnyevans
Out of the 90 Corvette FSM
Looked in the trouble codes for ABS, I will look further if anyone doesn't like this answer. It's pretty plain what the Lateral Accelerometer is used for.

Code 76
Circuit Description
The lateral accelerometer circuit provides a signal to the EBCM which reflects the severity of a vehicle turn. This information is used by the EBCM to modify the control of the rear wheel brakes to help prevent loss of control in a turn due light brake pedal application at speeds above 50 km/h (30 mph). Code 76 will be set when the accelerometer signal is greater than 0.6g for 120 seconds or more.

My interpretation of this is that if you lightly apply the brakes in a hard turn and the rear tires break loose, the ABS will try to stop this from happening. It will prevent rear brake lockup in a hard turn, trying to control a skid of the back end.

It doesn't appear to prevent control of the normal application of the ABS to the front wheels.

Code 75 5E1-47
Lateral Accelerometer (short to B+ or ground, or open circuit)

Wiring Diagram 5E1-7



General Description 5E1-2 last paragraph
Brake pedal pulsation and occasional tire "chirping" are normal during ABS operation on dry pavement. Also, during light braking in a turn, the rear brake pressure may be modulated to enhance vehicle stability under certain conditions. A slight brake pedal vibration during light brake pedal apply is normal during lateral acceleration levels above 0.6g's and speeds above 50 km/h (30 mph).

Found this above. this ought to be enough.

All information Quoted from 90 Corvette FSM.
All information may be good for dry conditions,but not true for wet conditions!!!!. when i went into a turn at 50 and started to spinout! nothing? kept sliding and the abs didnt no what to do because all the tires were hydroplaning!wrong. so up and over and into a cement pylon i went!!!! so my qeustion is, IS THERE A WAY TO DISABLE IT ON MY NEW 89 HELP? #1VETTESTER
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