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Home >> GMC >> 2002 >> Jimmy 2D Utility, Part Time, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1509 (Antilock Brake System, Traction Control System & Stability Control System) >> Diagnostic Information and Procedures >> Vehicle Stability Enhancement System Unwanted Activation >> Test Description

Test Description

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

The number below refers to the step number on the diagnostic table.

  1. 6:  Perform the Steering Position Sensor Test in order to verify if the steering wheel position sensor (SWPS) is operating properly.
Vehicle Stability Enhancement System Unwanted Activation

Step Action Values Yes No
Schematic Reference:  ABS Schematics  
1 Did you perform the ABS Diagnostic System Check? - Go to Step 2  Go to Diagnostic System Check - ABS 
2 Inspect the mounting of the yaw rate sensor. Refer to Yaw Rate Sensor Replacement .
Did you find and correct the condition?		 - Go to Step 15  Go to Step 3 
3
  1. Install a scan tool.
  2. Start the engine.
  3. With a scan tool, observe the Yaw Rate Sensor Input parameter in the VSES data list.
  4. Perform the Diagnostic Test Drive. Refer to Diagnostic Test Drive .
Does the scan tool display suddenly increase or decrease without rapid turning of the vehicle?		 - Go to Step 4  Go to Step 5 
4 Perform the diagnosis for DTC C1282. Refer to DTC C1282 .
Did you find and correct the condition?		 - Go to Step 15  Go to Step 12 
5
  1. Straighten the front wheels.
  2. Observe the Dual Analog SWPS Input A and Dual Analog SWPS Input B in the VSES data list.
  3. Slowly rotate the steering wheel in both directions.
Does the scan tool display change states as the steering wheel was rotated?		 - Go to Step 6  Go to Step 14 
6  With the scan tool, perform the Steering Position Sensor Test.
Did the SWPS pass the test?		 - Go to Step 7  Go to Step 14 
7
  1. Place the vehicle on a level surface.
  2. With a scan tool, observe the Lateral Accelerometer Input parameter in the VSES data list.
Does the scan tool display within the specified range?		 2.3-2.7 V Go to Step 9  Go to Step 8 
8 Inspect the mounting of the lateral accelerometer sensor. Refer to Lateral Accelerometer Replacement .
Did you find and correct the condition?		 - Go to Step 15  Go to Step 9 
9 Inspect the EBCM for the proper part number.
Did you find the correct part number?		 - Go to Step 10  Go to Step 12 
10 Inspect the power steering gear for the proper part number.
Did you find the correct part number?		 - Go to Step 11  Go to Step 13 
11 Inspect the alignment of the vehicle. Refer to Measuring Wheel Alignment in Wheel Alignment.
Did you find and correct the condition?		 - Go to Step 15  Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
12 Replace the EBCM. Refer to Electronic Brake Control Module Replacement .
Did you complete the repair?		 - Go to Step 15  -
13 Replace the power steering gear. Refer to Power Steering Gear Replacement in Power Steering System.
Did you complete the repair?		 - Go to Step 15  -
14 Replace the steering wheel position sensor (SWPS). Refer to Steering Shaft, Lower Bearing, and Jacket Replacement (Telescoping) or Steering Shaft, Lower Bearing, and Jacket Replacement (Manual) in Steering Wheel and Column.
Did you complete the repair?		 - Go to Step 15  -
15 Operate the system in order to verify the repair.
Did you correct the condition?		 - System OK Go to Step 2 
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