Bleeding Hydraulic Control Unit
CAUTION:
Ensure manual bleeding or pressure bleeding procedure is performed both before and after bleeding Hydraulic Control Unit (HCU).
- Bleed base brake system using manual or pressure bleeding procedure. See MANUAL BLEEDING or PRESSURE BLEEDING .
- Connect scan tool to Data Link Connector (DLC) located under left side of instrument panel. See Figure . Using scan tool, check for stored Diagnostic Trouble Codes (DTC). See RETRIEVING DIAGNOSTIC TROUBLE CODES under DIAGNOSIS & TESTING. If no DTCs exist, go to next step. If DTCs exist, clear DTCs from Controller Anti-Lock Brake (CAB) using scan tool, and go to next step.
- Using scan tool, perform ABS bleeding procedure. Follow screen prompts to bleed brake system. Disconnect scan tool. Fill master cylinder with brake fluid (if necessary). Repeat bleeding procedure until brake fluid flow is clear and free of bubbles. Repeat base system bleeding procedure. See MANUAL BLEEDING or PRESSURE BLEEDING . Refill master cylinder and test drive vehicle to ensure brakes operate properly and brake pedal is not spongy.