Question 1

How to overhaul the ABS Control Module for Antilock Brakes on Toyota 4Runner?

Accepted Answer

The Hydraulic Control Assembly for Antilock Brakes needs to receive lithium soap base glycol grease treatment on specified parts before examining if the brake actuator tube No.1 sustains high-pressure deformation. Turn off the ignition switch and perform brake pedal depression more than 20 times before beginning the work. First drain all brake fluid when you encounter painted surfaces then detach the front door scuff plate LH and front floor footrest followed by cowl side trim board LH and instrument panel finish plate and instrument panel finish panel sub-assembly lower and steering column hole cover by using the clips for removal. Begin by unharnessing the 3 connectors attached to the brake master cylinder followed by using SST 09023-00101 to detach the 4 brake lines. The push rod pin requires removing its clip before proceeding. Extract the brake master cylinder by removing its 4 nuts before eliminating the brake booster gasket. Brake actuators with 5 mm hexagon wrenches can be used to detach bracket no:1 before removing wire connections to the warning switch. The first step for repairing the brake master cylinder reservoir sub-assembly involves hitting the pin with a pin punch and hammer while unscrewing and pulling it out before removing the master cylinder reservoir filler cap and the three reservoir grommets. Workers should use needle nose pliers to unhook clips before they remove the brake actuator hose then employ SST to use on brake actuator tube No.1. The brake booster with accumulator pump assembly requires removal of two plugs and disconnecting master cylinder solenoid wire harnesses before extracting the assembly together with its two brake booster pump collars and bushes. The technician should detach brake booster pump bracket No.2 using a 5 mm hexagon wrench before removing brake actuator bracket No.3. Place the brake booster with accumulator pump assembly into a vise while securing it so you can remove the brake booster accumulator assembly with its O-ring to prevent any foreign entries into the pump. The brake booster pump assembly motor functionality can be checked through battery lead connection during inspection. Cut the brake booster accumulator assembly using safety glasses between the points designated as A and B to dispose of it properly. Releasing the 6 bolts and gasket for master cylinder solenoid enables you to detach it from the brake system. Next loosen the lock nuts to move the push rod clevis and rod operating adapter. To access both the master cylinder boot and the brake master cylinder kit use the piston push method after removing the C-ring and successfully withdraw the piston directly. You should apply lithium soap base glycol grease to the piston before installing the new brake master cylinder kit together with its snap ring. Subscribe the master cylinder boot along with push rod clevis by applying 26 Nm of torque to the lock nuts. Fit the master cylinder solenoid together with a new gasket and torque it at 32 Nm and then install the brake booster accumulator assembly with a new O-ring at 57 Nm. The mechanic should torque brake actuator bracket No.3 and brake booster pump bracket No.2 to 7.8 Nm. Secure all brake booster with accumulator pump assembly components in place before tightening the brake actuator tube No.1 to 14 Nm using SST 09023-00101 at SST. After attaching the brake actuator hose and reservoir grommets one should install the brake master cylinder reservoir sub-assembly by screwing it at 1.7 Nm tension followed by filling the reservoir. The installation includes braking actuator bracket No.1 and brake booster gasket along with brake master cylinder at 14 Nm while verifying proper connection and adequate torque of all brake lines. After reversing the component removal sequence you must install the push rod pin, steering column hole cover followed by all earlier components before bleeding the brake booster, brake line and master cylinder solenoid as you check brake pedal height and free play, reserve distance, fluid level, leakage and master cylinder operating condition.

Question 2

How to install the ABS Control Module on Toyota Tacoma?

Accepted Answer

Before installing the brake actuator start by affixing the actuator bracket assembly with 3 bolts torqued to 5.4 Nm. The installation requires to bolt the three nuts between brake actuator assembly and bracket while maintaining 19 Nm (194 kgf-cm, 14 ft-lbf) torque and avoiding brake tubes and wire harness damage. Each brake tube received temporary placement on the brake actuator before installing six brake tubes through the union nut wrench by using 20 Nm (199 kgf-cm, 14 ft-lbf) torque for 12 mm flare nuts with and without the wrench while 15 Nm (155 kgf-cm, 11 ft-lbf) torque and 14 Nm (145 kgf-cm, 10 ft-lbf) torque were used for 10 mm flare nuts with and without the wrench respectively. The brake actuator connector requires connection then secure locking. The air injection control driver should be mounted with two 10 Nm (102 kgf-cm, 7 ft-lbf) torqued bolts while the two connectors must be connected. The correct installation order is the air cleaner case followed by the air cleaner filter element sub-assembly and then by the air cleaner cap sub-assembly. Reattach the negative battery cable and tighten it to 3.9 Nm (40 kgf-cm, 35 in-lbf). Start by filling the reservoir with brake fluid before completing master cylinder bleeding procedure alongside brake line and brake actuator. The brake fluid reservoir should be checked for its fluid level while looking for signs of fluid leakage. Techstream helps users to check and calibrate the brake actuator while conducting yaw rate and acceleration sensor zero point calibration and to detect and reset any diagnostic trouble codes.

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