BR–80 BRAKE SYSTEM – ANTI–LOCK BRAKE SYSTEM (ABS) DTC 17 18 TRAC Motor Relay Circuit CIRCUIT DESCRIPTION This relay circuit supplies power to the TRAC pump motor. While the TRAC is activated, the ECU switches the motor relay ON and operates the TRAC pump motor. DTC No. | Diagnostic Trouble Code Detecting Condition | Trouble area 17 Conditions (1) and (2) continue for 0.2 sec. or more: (1) TRAC motor relay terminal (TMR) voltage: Battery positive voltage (2) Voltage of ABS & TRAC ECU terminal MTT: 0 V TRAC motor relay Open or short in TRAC motor relay circuit ECU 18 Conditions (1) and (2) continue for 2 sec. or more: (1) TRAC motor relay terminal (TMR) voltage: 0 V (2) Voltage of ABS & TRAC ECU terminal MTT: Battery positive voltage TRAC motor relay B+ short in TRAC motor relay circuit ECU Fail safe function: If trouble occurs in this relay circuit, the ECU cuts off current to the TRAC solenoid relay and prohibits TRAC control. WIRING DIAGRAM Y TRAC Motor Relay (R/B No.5) 4 G-B V-Y 3 R/B No.2 ABS No.2 2 3 2 W-G Battery W-B 1 TRAC Pump Motor ABS & TRAC ECU 12 V G-B 14 TMR 14 IB6 A20 V-Y 13 12 R- 13 IB6 A20 12 V W-G 4 22 MTT IB3 A20 R07060