GM 19121728
ABS Control Unit

Before ABS Control Module replacement, workers should use clean paper and shop towels for placement between the ABS Control Module assembly and inner fender. Disconnect the electrical connector from the ABS Control Module, then move it to the position behind the Brake Booster. Clean both module and master cylinder with de-natured alcohol before extracting brake pipes running between these parts. Also, pull away the rear brake pipe from cowl retaining points. Brake fluid leakage and contaminant entry will be minimized by putting rubber plugs into both the brake pressure modulator valve (BPMV) and master cylinder. The ABS Control Module extraction process starts with removing its mounting nuts followed by taking out the unit from the vehicle and positioning it on its side. The abs module requires 4 mounting screws that must be removed carefully before replacement of new screws. The abs module assembly needs replacement instead of attempting to fix damaged screws when they break during uninstallation. Use new collars to replace the 4 components which separate the ABS Control Module from the bpmv. When separating the ABS Control Module from the bpmv within the abs module, prevent the use of pry bars; if separation is impossible, then replace the abs module as a whole unit. Following ABS Control Module and bpmv separation, discard both solenoid plate and o-rings, then use a clean paper towel to clean the bpmv assembly while avoiding shop towels or brake cleaner. The examination of solenoids along with bpmv surface for signs of contamination or corrosion must lead to bpmv assembly replacement when needed. Affix the new solenoid plate with o-rings to the ABS Control Module afterward, adding the bpmv to the assembly, then secure the new collars before tightening their screws to 5 nm (44 inch lbs.) while performing a finger tighten first. The abs module installation must include a 9 nm (80 inch lbs.) torque value while tightening the mounting nuts correctly. The replacement process requires removal of rubber plugs from brake pipes and ABS Control Module assembly until you can install brake pipes onto the ABS Control Module assembly while applying 19 nm (14 ft. Lbs.) torque after initial finger tightening. The final steps require users to reconnect the electrical connector and install the rear brake pipe within the cowl retainer before they remove all paper or shop towels from between the ABS Control Module assembly and inner fender. Then the system requires abs brake bleeding to complete.

Install clean paper or shop towels on the ABS Control Module assembly before disconnecting its electrical connector. Move the connector to the Brake Booster position. Denatured alcohol enables cleaning of the master cylinder after which brake pipes must be extracted from the master cylinder to the ABS Control Module assembly while the rear brake pipe needs removing from its retainers at the cowl. Keep contaminants away from brake systems by installing rubber plugs into the brake pipes at the ABS Control Module assembly and master cylinder and brake pressure modulator valve (BPMV). Take out the ABS Control Module from your vehicle by removing its mounting nuts first then position the ABS Control Module in a dry and glove- and shop-towel-free area. The ABS Control Module needs to be positioned on its side while replacing the abs module assembly due to mounting screws which cannot be removed or break during repair. Uninstall the four mounting screws coupled with collars from the ABS Control Module and bpmv connection points while throwing away the previous pieces for new equipment. When positioning the abs module for rotation ensure that the bpmv remains facing upward and avoid misalignment of electrical connectors. The separation of ABS Control Module from bpmv should be done without any pry bar usage before discarding the solenoid plate and o-rings followed by a bpmv assembly cleaning process with dot-3 brake fluid and paper towels. Check for contamination and corrosion on solenoids and the bpmv assembly because you should replace it if necessary. The ABS Control Module assembly requires new solenoid plate and o-rings before connecting its bpmv attachment with new collars. Place mounting screws of the ABS Control Module under initial finger tightening then apply torque to 5 n.m (44 lb in). After that, attach the abs module to the vehicle and fasten the mounting nuts with a torque of 9 n.m (80 lb in). Put away rubber plugs at the brake pipe and ABS Control Module assembly site before you attach the brake pipes to the ABS Control Module assembly while tightening the fittings to 19 n.m (14 lb ft). Apply this procedure to the ABS Control Module assembly to master cylinder brake pipe installation. Attach the electrical connector while securing the rear brake pipe to its cowl retainer then pull out paper materials from within the ABS Control Module assembly interface and inner fender. The abs brake system needs bleeding before proceeding to control module reference materials which contain information about setup and replacement procedures.

Begin by installing clean paper or shop towels between the EBCM assembly and the inner fender.