Automated Brake Bleed Procedure (With Pressure Bleeder)

AUTOMATED BRAKE BLEED PROCEDURE (WITH PRESSURE BLEEDER)





^ TOOLS REQUIRED
- J29532 Pressure Bleeder
- Scan Tool
- Master Cylinder Adapter SA9150BR
- Delco Supreme II (or equivalent) DOT 3 Brake Fluid
- Plastic Bleeder Bottle (equipped with hose to recover brake fluid)





The automated brake bleed procedure is used on DBC7 ABS systems. This procedure uses a Scan tool to cycle the solenoid valves and run the pump in order to purge air from the secondary circuits. The automated bleed procedure opens the secondary circuits, then allows trapped air in the Brake Pressure Modulator Valve (BPMV) to flow outwards to the individual corners, where the air is purged from the system.

IMPORTANT: The automated brake bleed procedure is required when one of the following has occurred:
^ Valve assembly removal or replacement.
^ Manual bleed of calipers and wheel cylinders does not obtain desired pedal height or travel.
^ Master cylinder removal or replacement.
^ Extreme loss of brake fluid.
^ Air ingestion is suspected.
Pressure bleeding is the preferred method of brake system bleeding and should be used whenever possible. If a pressure bleeder is not available, a manual pedal method can be used with the aid of an assistant.

PRELIMINARY INSPECTION AND SETUP
1. Inspect battery for full charge. Charge battery or repair charging system if battery not fully charged.
2. Connect Scan tool to DLC connector. Check and repair current or history DTC's prior to performing ABS bleed procedure.
3. Inspect for visual damage or leaks, repair as needed.
4. Fill master cylinder reservoir with clean brake fluid. Keep reservoir at least half full and Brake Bleeder Adapter SA9150BR on bleed procedure.

IMPORTANT: Use only DOT 3 brake fluid. Brake fluid is corrosive. Take care not to allow brake fluid to contact any painted surfaces. Wipe off and clean painted surface immediately if contact is made.

5. Connect Pressure Bleeder J29532 (or equivalent) and pressurize to 241 kPa (35 psi).
6. Turn ignition switch to RUN, engine Off.
7. Raise vehicle on a suitable support.
8. Connect Scan tool and establish communication with ABS system by following these steps:
8.1 Select DIAGNOSTIC
8.2 Select appropriate model year
8.3 Select SATURN (not passenger car)
8.4 Select CHASSIS
8.5 Select CAR LINE - Z
8.6 Select CONTINUE ("ABS braking is not available when ABS/TCS lamps are illuminated" statement will appear on screen.)
8.7 Select SPECIAL FUNCTIONS
8.8 Select AUTOMATED BLEED ("Connect required brake bleed equipment" statement will appear on screen.)

PERFORMING AUTOMATED BLEED PROCEDURE (WITH PRESSURE BLEEDER)





1. With pressure bleeder at 241 kPa (35 psi) and bleeder screws in closed position, select CONTINUE to start bleed procedure. The first part of the automated bleed procedure will cycle the pump for 60 seconds. After cycling the pump, the Scan tool will go into a cool-down mode for 180 seconds, a 3 minute timer will be displayed. The automated bleed procedure will not continue until the timer has expired, and it cannot be overridden.





IMPORTANT: Fill master cylinder reservoir with clean brake fluid. Keep reservoir at least half full and Brake Bleeder Adapter SA9150BR on bleed procedure.

2. The Scan tool will instruct to open the right rear bleeder screw first. Once bleeder screw is opened, press START. The Scan tool will then cycle both respective release valves and pump motor for 60 seconds. Once Scan tool is done cycling the designated brake corner, close the bleeder screw prior to moving on the next corner.





3. Repeat step 2 with the Scan tool for the remaining brake corners in the following order:
^ Left Rear
^ Right Front
^ Left Front

IMPORTANT: The pressure bleeder should still be attached with 241 kPa (35 psi).

4. Next, the Scan tool will instruct to open each bleeder screw an additional 20 seconds, starting again with the right rear corner. This will allow any remaining air to purge out of the system. Open bleeder screw and press CONTINUE. Once Scan tool is done cycling designated brake corner, close the bleeder screw prior to moving on to the next corner. Follow same procedure for the remaining brake corners (Left-Rear, Right-Front, Left-Front).
5. Once all four bleeder screws have been opened and closed the Scan tool will display PROCEDURE COMPLETE.
6. Torque bleeder screws.
Torque: Bleeder Screws - Front: 11 Nm (97 inch lbs.)
Torque: Bleeder Screws - Rear: 7.5 Nm (66 inch lbs.)
7. Release pressure from pressure bleeder and disconnect from vehicle.
8. Depress brake pedal to gauge pedal height and travel. It may be necessary to repeat steps 1 - 7 if pedal feel and travel are unacceptable.
9. Remove Scan tool from DLC connector.
10. Lower vehicle.
11. Inspect brake fluid level in master cylinder reservoir, fill as needed with DOT 3 brake fluid.
12. Road test vehicle to verify proper brake pedal height and trave1.