Traction Control System - Bleeding Method
90lexus04 SUSPENSION 002 08-31-90 LS400Title BLEED METHOD FOR TRACTION CONTROL SYSTEMS
A bleeder plug has been installed on the accumulator union bolt of the traction pump assembly for improved bleeding of the traction control system. Part of the bleed method instructions have been changed as follows.
PRODUCTION EFFECTIVE:
VIN P/D
JT8UF11E-L0014447 12/89
REPAIR MANUAL EFFECTED:
Pub. Name Pub. No. Page
Lexus LS 400 (Volume 1) RM144U1 BR-6
BLEEDING OF TRAC CONTROL SYSTEM ( FOR TRAC )
BLEED TRACTION CONTROL SYSTEM CAUTION:
* When repairing the brake master cylinder or TRAC system, bleed the air out of the TRAC system.
* The fluid is under high pressure, and could spray out with great force, so exercise caution.
(a) Connect a vinyl tube to the bleeder plug of the accumulator, then loosen the bleeder plug.
(b) Start the engine, then operate the accumulator until all the air has been bled out of the fluid.
(c) Tighten the bleeder plug and stop the engine.
Torque: 110 kg-cm ( 8 ft.lb. 11 N-m )
CAUTION: Brake fluid is very damaging to painted surfaces. Protect all appropriate painted surfaces from possible brake fluid damage.
(d) Remove the air cleaner, then temporarily reinstall it so the engine can be started.
(e) Connect a vinyl tube to the bleeder plug of the TRAC actuator, then loosen the bleeder plug.
(f) Temporarily reinstall the air cleaner making sure all hoses and wires are connected prior to engine start up. If a hose or wire is left disconnected, an engine code will be set.
(g) Start the engine, then operate the TRAC pump motor until all the air has been bled out of the fluid.
(h) Tighten the bleeder plug and stop the engine.
Torque: 110 kg-cm ( 8 ft.lb. 11 N-m )
(i) Check to see if any diagnostic code has been set which indicates trouble. If there is a code, analyze and correct the problem, and clear the memory.
2. CHECK FLUID LEVEL IN RESERVOIR TANK Check the fluid level and add fluid if necessary.
FLUID: SAE J1703 or FMVSS NO. 116 DOT 3
HINT: Add fluid with engine idling.
DIAGNOSTIC CODE CLEARANCE (IF REQUIRED)
1. Using SST (09843-18020), connect terminals Tc and E1 of TDCL or check connector.
2. Clear the diagnostic codes stored in ECU by depressing the brake pedal 8 or more times within 3 seconds.
3. Check that the TRAC indicator light shows the normal code.
4. Remove the SST from the terminals of TDCL or check connector.