Bleed Procedure

1. Raise the vehicle. Support the vehicle.

Caution: To help avoid personal injury, when a vehicle is on a hoist, provide additional support for the opposite end from which you are removing components. The additional support will reduce the possibility of the vehicle falling off the hoist. When you are removing major components from the vehicle while the vehicle is on a hoist, chain the vehicle frame to the hoist pads at the same end from which you are removing the major components to prevent tip-off. If you fail to follow these precautionary measures, vehicle damage, serious personal injury, or death may result.

2. Remove all four tire and wheel assemblies.
3. Inspect the brake system for leaks.
4. Inspect the brake system for component damage.
5. Inspect the battery state of charge.
6. Connect the Scan Tool to the DLC.
7. Turn the ignition to RUN. Do not start the engine.
8. Establish communications with the Scan Tool.
9. Select the ABS/TCS system features.
10. Select Special Functions.
11. Select Auto Bleed Procedure
12. Bleed the base brake system. Refer to Pressure Bleeding in Brake Bleeding.
13. Follow the Scan Tool driven instructions until the proper brake pedal height is achieved.
14. If any malfunctions are detected, the bleed procedure will be aborted:
^ If DTCs are present, the Scan Tool will display DTCs PRESENT or will list the DTCs, depending on when the DTCs were set.
^ DTCs can be cleared in the Trouble Codes mode. Refer to the appropriate DTC in order to clear the DTC.
^ If the test is aborted but no DTCs are listed, refer to ABS Diagnostic System Check.
^ Correct all system malfunctions before attempting the bleed procedure again.
^ If a road test is required for diagnosis, and the brake pedal is spongy, perform a conventional brake bleed. Achieve a firm pedal before driving the vehicle.
15. When the auto bleed procedure is complete, perform the following steps:
^ Depress the brake pedal. The brake pedal should be high and firm.
^ If the pedal is not firm, inspect the brake system for conditions that might cause the condition. Refer to Brake System Testing in Hydraulic Brakes.
^ If the brake system is OK, and excess pedal travel persists, repeat the bleed procedure.
16. Disconnect the scan tool.
17. Install the tire and wheel assemblies.
18. Inspect the brake fluid level and fill as necessary.
19. Road test the vehicle while making several ABS/TCS actuations in a suitable area. The brake pedal should remain high and firm throughout the test.