ABS hydraulic unit with control unit (Renault Espace III)

Removal

Fig. 12.33. Removing the hydraulic unit: 1 - ABS control unit electrical connector; 2 - ABS control unit; 3 - hydraulic unit bracket mounting bolt

• To reduce brake fluid loss, lock the brake pedal in the depressed position.
• Disconnect the cable from the negative battery terminal.
• Remove the plastic protective covers.
• Unscrew the bolt and remove the rubber cushion.
• Remove the three bolts securing the ABS hydraulic unit bracket.
• Remove the bracket and tie the unit to the body so that it does not hang on the pipes
• Disconnect the 40-pin connector from the unit.
• Using a ratchet wrench, disconnect the brake lines.
• To reduce the loss of brake fluid, install plugs in the fittings.
• Remove the ABS hydraulic unit assembly with the control unit.

Installation

Fig. 12.34. Location of pipelines on the ABS hydraulic unit: A - outlet for the pipe to the front left brake; B - outlet for the line to the rear right brake; C - outlet for the line to the rear left brake; D - outlet for the line to the front right brake, E - inlet for the line of the circuit "front left - rear right brakes" from the master brake cylinder; F - inlet for the "front right - rear left brake" circuit line from the master brake cylinder

• Installation is carried out in the reverse order of removal.
• Install the ABS hydraulic unit complete with control unit, ensuring correct piping arrangement (fig. 12.34).
• Remove air from the hydraulic circuit of the brake system following the required sequence of operations.
• Check the system using the G function on the XR25 handheld diagnostic tool.
• After the road test (with anti-lock braking system regulation) check the ABS operation on the XR25 device.
• Confirm test completion: G13*.