Hydraulic Control Unit (HCU)

Hydraulic Control Unit (HCU)

NOTE: This procedure is only required when a new HCU is installed.

NOTE: When any part of the hydraulic system has been disconnected for repair or new installation, air may get into the system and cause spongy brake pedal action. This requires bleeding of the hydraulic system after it has been correctly connected. The hydraulic system can be gravity bled, manually bled, or bled with pressure bleeding equipment.

1. Connect the diagnostic tool and follow the Antilock Brake System (ABS) bleed instructions.
2. Use the pressure or manual bleed procedure(s) to bleed the system. Begin at the RH rear brake caliper.