LaCrosse V6-3.6L (2007)
Brake Bleeding: Service and Repair
Antilock Brake System Automated Bleed Procedure
Antilock Brake System Automated Bleed Procedure
Bleeding the ABS System
Caution: Refer to Brake Fluid Irritant Caution in Service Precautions.
Notice: Refer to Brake Fluid Effects on Paint and Electrical Components Notice in Service Precautions.
Perform a manual or pressure bleeding procedure. If the desired brake pedal height results are not achieved, perform the automated bleed procedure
below.
The procedure cycles the system valves and runs the pump in order to purge the air from the secondary circuits normally closed off during normal base
brake operation and bleeding. The automated bleed procedure is recommended when air ingestion is suspected in the secondary circuits, or when the
BPMV has been replaced.
Automated Bleed Procedure
Notice: The Auto Bleed Procedure may be terminated at any time during the process by pressing the EXIT button. No further Scan Tool
prompts pertaining to the Auto Bleed procedure will be given. After exiting the bleed procedure, relieve bleed pressure and disconnect
bleed equipment per manufacturers instructions. Failure to properly relieve pressure may result in spilled brake fluid causing damage to
components and painted surfaces.
1. Raise the vehicle on a suitable support.
2. Remove all four tire and wheel assemblies.
3. Inspect the brake system for leaks and visual damage.
4. Inspect the battery state of charge.
5. Install a scan tool.
6. Turn ON the ignition, with the engine OFF.
7. With the scan tool, establish communications with the EBCM. Select Special Functions. Select Automated Bleed from the Special Functions
menu.
8. Bleed the base brake system.
9. Follow the scan tool directions until the desired brake pedal height is achieved.
10. If the bleed procedure is aborted, a malfunction exists. Perform the following steps before resuming the bleed procedure:
*
If a DTC is detected, refer to Diagnostic Trouble Code (DTC) List - Vehicle and diagnose the appropriate DTC. See: Powertrain
Management/Computers and Control Systems/Testing and Inspection/Diagnostic Trouble Code Descriptions
*
If the brake pedal feels spongy, perform the conventional brake bleed procedure again.
11. When the desired pedal height is achieved, press the brake pedal in order to inspect for firmness.
12. Remove the scan tool.
13. Install the tire and wheel assemblies.
14. Inspect the brake fluid level.
15. Road test the vehicle while inspecting that the pedal remains high and firm.
