TSRM/MK4 Supra/Repair Manual
Repair ManualWiring Diagrams
p.095
BAT/Brakes, ABS & TRAC Systems96 / 167
p.097
INSPECTION PROCEDURE. — MK4 Supra Brakes, ABS & TRAC Systems, page 96
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BR–96 BRAKE SYSTEM – ANTI–LOCK BRAKE SYSTEM (ABS) INSPECTION PROCEDURE. 1 Check for open and short in harness and connector between sensor and ECU (See page IN–30). OK NG Repair or replace harness or connector. 2 Check voltage between terminals GS1, GS2, GST of ECU and body ground. w/o TRAC ON GS2 GS1 GST BE6653 RO7414 w/ TRAC ON GS1 GST GS2 BE6653 RO7415 P 1. Remove ABS (& TRAC) ECU with connectors still connected. 1. Disconnect sensor connector. 3. Turn ignition switch ON. C Measure voltage between terminals GS1, GS2, GST of ECU and body ground. OK Voltage: GS1, GS2: 10 — 14 V GST: As shown below IG SW ON OFF 12 V 1.5 sec. 0.5 sec. GST 0 V OK NG Check and replace ABS (& TRAC) ECU. Check and replace lateral acceleration sensor.