GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2000 🢒 Seville 🢒 Brakes 🢒 Antilock Brake System 🢒 Vehicle Stability Enhancement System Excessive Brake Pulsation

Object Number: 566618 Size: MF
ABS Components
Vehicle Stability Enhancement System (w/JL4)
Handling ESD Sensitive Parts Notice

Circuit Description

When braking during vehicle stability enhancement system (VSES) activation, the brake pedal will feel different than the ABS pedal pulsation. The brake pedal pulsates at a higher frequency during VSES activation. Perform this test if the brake pedal buzzes excessively during medium braking. Medium braking is defined as greater than 0.3 g or 3 m/s² (10 ft/s²).

Step

Action

Value(s)

Yes

No

1

Did you perform the ABS Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check - ABS

2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. Select the powertraint control module (PCM) display DTCs function.

Did the scan tool display DTC P1575?

--

Go to DTC P1575 Extended Travel Brake Switch Circuit in Engine Controls - 4.6L

Go to Step 3

3
  1. With a scan tool, observe the Extended Travel Brake Switch parameter in the DRP/ABS/TCS data list.
  2. Step on and off the brake pedal with enough force to simulate a hard braking condition. As the brake pedal is pressed and released, the scan tool should read Applied and Released.
  3. Use a tape measure in order to measure the distance that the brake pedal travels for the scan tool to read Applied.

Does the distance measure within the specified range?

1.0-1.3 in (2.5-3.3 cm)

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 4

4

Adjust or repair the extended travel brake switch as necessary. Refer to Stop Lamp Switch Adjustment or Stop Lamp Switch Replacement in Hydraulic Brakes.

Did you complete the repair?

--

Go to Step 5

--

5

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 2