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BR±84± BRAKE SYSTEMANTI±LOCK BRAKE SYSTEM (ABS)
Page 954 of 2543
Check ABS actuator solenoid.
Check continuity between terminal (A6) 4 and (A7)
1, 3, 4, 6 of the ABS actuator connector.
Continuity
Replace ABS actuator.
Check for open and short in harness and connector between ABS (& TRAC)
ECU and actuator (See page
IN±30).
HINT: Resistance of each solenoid coil is 1.1 .
Repair or replace harness or connector.
If the same code is still output after the diagnostic trouble code is deleted, check the contact
condition of each connection.
If the connections are normal, the ECU may be defective.
± BRAKE SYSTEMANTI±LOCK BRAKE SYSTEM (ABS)BR±85
Page 955 of 2543
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.
BR±86± BRAKE SYSTEMANTI±LOCK BRAKE SYSTEM (ABS)
Page 956 of 2543
If the same code is still output after the diagnostic trouble code is deleted, check the contact
condition of each connection.
If the connections are normal, the ECU may be defective.
Check TRAC actuator solenoid.
Disconnect TRAC actuator connector.
Check continuity between each terminal of TRAC
solenoid relay shown below.
Open
Continuity
(Reference value )Terminals 2 and 4
Terminals 1 and 2
Repair or replace harness or connector.
Check for short in harness and connector between SMC and SRC terminals
with TRAC actuator and ECU connectors are disconnected.
Terminals 1 and 3
Repair or replace harness or connector.
Replace TRAC actuator.
Check for open and short in harness and connector between solenoid relay
and ECU (See page
IN±30).
`
± BRAKE SYSTEMANTI±LOCK BRAKE SYSTEM (ABS)BR±87
Page 957 of 2543

CIRCUIT DESCRIPTION
The speed sensor detects the wheel speed and sends the ap-
propriate signals to the ECU. These signals are used to control
both the ABS and TRAC control systems. The front and rear ro-
tors each have 48 serrations. When the rotors rotate, the mag-
netic field emitted by the permanent magnet in the speed sensor
generates an AC voltage. Since the frequency of this AC volt-
age changes in the direct proportion to the speed of the rotor,
the frequency is used by the ECU to detect the speed of each
wheel.
31, 32
33, 34
35
36
Detection of any of conditions (1) through (3):
(1) At vehicle speed of 10 km/h (6 mph) or
more, pulses are not input for 5 sec.
(2) Momentary interruption of he vehicle
speed sensor signal occurs at least 7
times in the time between switching the
ignition switch ON and switching it OFF.
(3) Abnormal fluctuation of speed sensor sig±
nals with the vehicle speed 20 km/H (12
mph) or more.
Speed sensor signal is not input for about 1
sec. while the left front and right rear speed
sensor signals are being checked with the IG
switch ON.
Speed sensor signal is not input for about 1
sec. while the right front and left rear speed
sensor signals are being checked with the IG
switch ON.
Right front, left front, right rear and left rear
speed sensor.
Open or short in each speed sensor circuit.
ECU
Open in left front, right rear speed sensor
circuit.
ECU
Open in right front, left rear speed sensor
circuit.
ECU
HINT: DTC No.31 is for the right front speed sensor.
DTC No. 32 is for the left front speed sensor.
DTC No.33 is for the right rear speed sensor.
DTC No.34 is for the left rear speed sensor.
Fail safe function: If trouble occurs in the speed sensor circuit, the ECU cuts off current to the ABS
solenoid relay and prohibits ABS control.
DTC 31 32 33 34 35 36 Speed Sensor Circuit
BR±88± BRAKE SYSTEMANTI±LOCK BRAKE SYSTEM (ABS)
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± BRAKE SYSTEMANTI±LOCK BRAKE SYSTEM (ABS)BR±89
Page 959 of 2543
Check speed sensor.
Replace speed sensor.
Repair or replace harness or connector.
Check for open and short in harness and connector between each speed sen-
sor and ECU (See page
IN±30).
NOTICE: Check the speed sensor signal last (See page BR±62).
Front
Rear
1. Remove front fender splash shield.
2. Disconnect speed sensor connector.
Measure resistance between terminals 1 and 2 of
speed sensor connector.
Resistance : 0.7 Ð 1.7 k
Measure resistance between terminals 1 and 2 of
speed sensor connector and body ground.
Resistance : 1 M or higher
1. Remove rear set cushion, seat back and
quarter trim panel.
2. Disconnect speed sensor connector.
Measure resistance between terminals 1 and 2 of
speed sensor connector.
Resistance : 0.7 Ð 1.7 k
Measure resistance between terminals 1 and 2 of
speed sensor connector and body ground.
Resistance : 1 M or higher BR±90
± BRAKE SYSTEMANTI±LOCK BRAKE SYSTEM (ABS)
Page 960 of 2543
Check sensor rotor and sensor installation.
Replace speed sensor or rotor.
Remove front speed sensor rotor (See page
SA±15).
Check sensor rotor serrations.
No scratches or missing teeth.
Check the front speed sensor installation.
The installation bolt is tightened properly.
Remove the drive shaft (See page BR±45).
Check sensor rotor serrations.
No scratches or missing teeth.
Check and replace ABS (& TRAC) ECU.
NOTICE: Check the speed sensor signal last (See page BR±62).
Check the rear speed sensor installation.
The installation bolt is tightened properly and
there is no clearance between the sensor and
rear axle carrier.
± BRAKE SYSTEMANTI±LOCK BRAKE SYSTEM (ABS)BR±91