DTC 89: TRAC Ecu Circuit (Supra Turbo)
WARNING: This page is about a different variant/trim than selected.
Ensure ignition is off. Disconnect harness connectors from ECT ECU and TRAC ECU. Both ECUs are located behind glove box. TRAC ECU is located next to ECT ECU. Check continuity between circuits that connect both ECUs. See Figure and Figure . Repair as needed. If all circuits are okay, substitute TRAC ECU with known good unit and retest. If more diagnostic information is required for Toyota TRAC system, see appropriate BRAKES article in BRAKES section.