TSRM/MK4 Supra/Repair Manual
Repair ManualWiring Diagrams
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BAT/Brakes, ABS & TRAC Systems162 / 167
p.163
TRAC Indicator Light Circuit — MK4 Supra Brakes, ABS & TRAC Systems, page 162
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BR–162 BRAKE SYSTEM – TRACTION CONTROL SYSTEM (TRAC) TRAC Indicator Light Circuit CIRCUIT DESCRIPTION The TRAC indicator blinks during TRAC operation. This indicator is also used for warnings when the trouble occurs and for displaying diagnostic trouble codes. WIRING DIAGRAM J/B No.1 GAUGE Y 9 7 W 11 W 24 IND C10 C12 IF2 T9 TRAC Indicator Light DLC2 TRAC ECU R07074 INSPECTION PROCEDURES Troubleshoot in accordance with flow chart instructions for each trouble symptom. TRAC Indicator light does not light up Go to Combination Meter Troubleshooting on page BE–43. TRAC Indicator light remains ON 1 Check diagnostic trouble code (See page BR–126). Indicator light remains ON | Output NG Code | Repair circuit indicated by the code output. 2 Check for short in harness and connector between TRAC ECU and TRAC indicator light (See page IN–30). OK NG Repair or replace harness or connector. Check and replace TRAC ECU.