BAT/Brakes, ABS & TRAC Systems — Dtc 25 27 TRAC Actuator Solenoid Circuit, page 86

BR–86
BRAKE SYSTEM – ANTI–LOCK BRAKE SYSTEM (ABS)

DTC 25 27 TRAC Actuator Solenoid Circuit

CIRCUIT DESCRIPTION

The TRAC actuator solenoid operates in accordance with signals from the ECU and raises the fluid pressure
in and releases it from the brake cylinders.

DTC No. | Diagnostic Trouble Code Detecting Condition | Trouble area

25
Conditions (1) and (2) continue for 0.05 sec.
or more:
(1) TRAC solenoid relay terminal (TSR)
    voltage: Battery positive voltage
(2) Voltage oS & TRAC ECU terminal AB
    SMC: 0 V
TRAC actuator
Open or short in SMC circuit
ECU

27
Conditions (1) and (2) continue for 0.05 sec.
or more:
(1) TRAC solenoid relay terminal (TSR)
    voltage: Battery positive voltage
(2) Voltage of ABS & TRAC ECU terminal
    SRC: 0V
TRAC actuator
Open or short in SRC circuit
ECU

Fail safe function: If trouble occurs in this solenoid circuit, the ECU cuts off current to the ABS and TRAC solenoid
         relays and prohibits ABS and TRAC control.

WIRING DIAGRAM

R
TRAC Solenoid
1  Relay (R/B No.5)
                    6  B-R    18        B-R    1   TSR
2                                  IB6
ABS                 4  V-Y    13        V-Y   12   R-
No.1                               IB6              A20
R/B
No.2
        ALT
              3    5
                        TRAC OFF
                        Indicator Light              Monitor
m
        W-B       3        1 V   11        V    2   SMC
Battery             R-W              IB2              A23
                    4       2V-Y  10        V-Y  8   SRC
                                   IB2              A23
                        TRAC Actuator

ABS & TRAC ECU
12 V

RO7069