BR–158 BRAKE SYSTEM – TRACTION CONTROL SYSTEM (TRAC) INSPECTION PROCEDURE 1 Check for open and short n harness and connector between terminals EFI+, EFI–, TRAC+ and TRC– of ECU and ECM (See page IN–30). ON ABSO BRP BRC BE6653 R06984 P Remove TRAC ECU with connectors still connected. C Measure voltage between terminals ABSO, BRC, BRP of TRAC ECU and body ground when ignition switch is turned ON. OK Voltage: ABSO, BRC: 6 — 14 V BRP: About 7 V (Pulse) (Reference) 6 – 14 V 1 V or less 3 ms 200 ms NG OK Check and replace TRAC ECU. 2 Check voltage between terminals ABSO, BRC, BRP of TRAC ECU and body ground with TRAC ECU connector disconnected. ON BRP BRC BE6653 RO7628 ABSO P Disconnect TRAC ECU connector. C Measure voltage between terminals ABSO, BRC, BRP of TRAC ECU and body ground when ignition switch is turned ON. OK Voltage: See step 1. NG OK Check and replace TRAC ECU. 3 Check for open and short in harness and connector between ABS & TRAC ECU and TRAC ECU (See page IN–30). OK NG Repair or replace harness or connector. Check and replace ABS & TRAC ECU.