ABS - Air Bleeding Procedure
Group: CHASSISNumber: 93-50-014
Date: OCTOBER, 1993
Model: 1992-93 SONATA
Subject:
ABS AIR BLEEDING PROCEDURE
When any work is performed on the brake hydraulic system or if air is suspected to be in the hydraulic system, the brake system must be air bled. Sonatas equipped with ABS must be bled in two steps as follows:
STEP 1
CAUTION:
Always use a bleeder hose when bleeding the modulator. The brake fluid may still be pressurized in the accumulator, and could damage your eyes or skin if you open a bleeder port without first attaching a bleeder hose.
1. After working on the brake system, cheek all brake lines and fittings for proper installation. First bleed in the conventional manner, as outlined in the applicable shop manual. It is important to bleed the brake system in the sequence: (see illustration).
STEP 2
Air bleed the ABS modulator using the following steps:
A) Connect the MUT with the correct ROM and system pack. The connector is located in the fuse box at the lift kick panel.
B) Turn the ignition key to the "ON" position to confirm that the MUT is "ON" (do not start the engine).
C) Attach the bleeder hose to the RF/LR sump bleeder port and submerge the opposite hose end in a clean container partially filled with brake fluid (use only DOT 3 grade fluid).
1. RF/LR SUMP
2. LF/RR SUMP
3. RF/LR ACCUMULATOR
4. LF/RR ACCUMULATOR
D) With the help of an assistant, apply light and constant pressure to the brake pedal, or use a pressure bleeder.
E) Operate the RF B/D valve by using the MUT as follow;
a) Select "Actuator Test" number 3 from the MUT menu.
b) Input code number 43 (refer to the MUT sequence table).
c) Push "YES" on the MUT.
F) Slowly open the bleeder port 1/2 to 3/4 of a turn and allow fluid to flow out until no air is seen in the fluid.
CAUTION:
NEVER OPEN BLEEDER SCREW WITHOUT FIRST ATTACHING BLEEDER HOSE, AS FLUID CAN FLOW OUT AT A HIGH PRESSURE.
Note:
Even though the brake pedal may drop slightly as the solenoid valve closes, continue to apply medium pressure to the brake pedal. If the brake pedal needs to be re-pressed, close the bleeder port first and then release and re-apply pressure to the brake pedal.
G) Stop the operation of the actuator by entering "99" and pushing "YES" on the MUT.
H) Operate the LR BID valve in the modulator by entering code number "41" in the MUT.
I) Repeat steps F and G.
J) Close the bleeder port and remove the bleeder hose.
K) Tighten the bleeder plug screw.
Torque: 5-6 N-m (50-60 kg. cm, 43-52 lb.in.)
L) Bleed the air from the other port (LR/RR sump, RF/LR accumulator and LF/RR accumulator) using the above procedures and the table.
MULTI-USE - TESTER CODE NUMBER AND SEQUENCE TABLE
WARRANTY INFORMATION