Bleeding Hydraulic Control Unit (HCU)
CAUTION:
Ensure manual bleeding or pressure bleeding procedure is performed before 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 Fig 1 . Using scan tool, check for stored system fault messages. If no system fault messages exist, go to next step. If system fault messages exist, clear system fault messages from Controller Anti-Lock Brake (CAB) using scan tool, and bleed base brake system using manual or pressure bleeding procedure. See MANUAL BLEEDING or PRESSURE BLEEDING . Go to next step.
- Using scan tool, perform ABS bleeding procedure. Follow screen prompts to bleed brake system. Disconnect scan tool. Bleed base brake system again using manual or pressure bleeding procedure. Go to next step.
- Fill master cylinder with brake fluid (if necessary). Repeat bleeding procedure until brake fluid flow is clear and free of bubbles. Test drive vehicle to ensure brakes operate properly and brake pedal is not spongy.