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)
Page 969 of 2543
DTC 58 TRAC Pump Motor Circuit
CIRCUIT DESCRIPTION
This motor is used to apply hydraulic pressure for the rear wheel brakes during TRAC control.
DTC No. Diagnostic Trouble Code Detecting Condition Trouble area
58
Conditions (1) through (3) continue for 2 sec.
or more:
(1) TRAC motor relay: Normal
(2) TRAC motor: OFF
(3) Voltage of ABS & TRAC ECU terminal
MTT: 4±8 V
TRAC pump motor
Open in TRAC pump motor circuit
ECU
Fail safe function: If trouble occurs in this circuit, the ECU cuts off current to the TRAC solenoid relay and
prohibits TRAC control.
BR±100± BRAKE SYSTEMANTI±LOCK BRAKE SYSTEM (ABS)
Page 971 of 2543
DTC 61 TRAC ECU Communication Circuit Malfunction
CIRCUIT DESCRIPTION
DTC No.Diagnostic Trouble Code Detecting ConditionTrouble area
61
Open or short in THFA, TRCO circuit
ABS & TRAC ECU
TRAC ECU
Either of the following (1) or (2) continues for
more than 8 sec.:
(1) Vehicle speed signal of 4 wheels is less
than 1 km/h (1 mph) when TRCO signal is
input.
(2) Voltage of ABS & TRAC ECU terminal
THFA is 0 V when TRCO signal is not
input.
BR±102± BRAKE SYSTEMANTI±LOCK BRAKE SYSTEM (ABS)
Page 994 of 2543
CUSTOMER PROBLEM ANALYSIS CHECK SHEET
TRAC Check Sheet
Inspector 's
Name:
Registration No.
Customer 's Name
Registration Year
//
Frame No.
Date Vehicle
Brought In
//
Odometer Reading
km
Miles
Date Problem First Occurred
//
Frequency Problem Occurs
Continuous Intermittent ( Times a day)
TRAC does not operate. (Wheels spin when starting rapidly).
Symptoms
TRAC Indicator
Light Abnormal
Remains ON Blinks Does not Light Up
TRAC OFF Indicator
Light Abnormal
Remains ON Does not Light Up
Ch k It
ABS Warning LIght
Normal Malfunction Code (Code )
Check Item
Malfunction
Indicator Lamp
Normal Malfunction Code (Code )
Diagnostic
Tro ble Code
1st Time
Normal Code Malfunction Code (Code )
Trouble Code
Check
2nd Time
Normal Code Malfunction Code (Code )
± BRAKE SYSTEMTRACTION CONTROL SYSTEM (TRAC)BR±125
Page 997 of 2543
BR±134
BR±137
BR±137
BR±138
BR±138
BR±138
BR±138
BR±142
BR±145
BR±147
BR±149
BR±149
BR±152
BR±152
BR±155
BR±156
BR±157
Open or short in sub±throttle actuator circuit
Step motor does not move to a position decided by ECU
Sub±throttle valve does not move even when the sub±throttle
valve is controlled to fully open position by ECU
Right front wheel speed sensor signal malfunction
Left front wheel speed sensor signal malfunction
Right rear wheel speed sensor signal malfunction
Left rear wheel speed sensor signal malfunction
Low battery positive voltage or abnormally high battery
positive voltage
Malfunction in ABS or TRAC (BRAKE) control system
Open or short in NE signal circuit
Main throttle position sensor circuit malfunction
Open or short in main throttle position sensor circuit
Sub±throttle position sensor circuit malfunction
Open or short in sub±throttle position sensor circuit
Engine & ECT system malfunction
ECM communication circuit malfunction
ABS & TRAC ECU communication circuit malfunction
Malfunction in TRAC ECU
DiagnosisCodeTRAC Indicator Light
Blinking PatternSee page
DIAGNOSTIC TROUBLE CODE CHART
If a malfunction code is displayed during the diagnostic trouble code check, check the circuit listed for that code
in the table below and proceed to the relevant page.
HINT: If the TRAC indicator light lights up and the TRAC indicator light does not blink when the DTC is checked,
check the blinking pattern of the ABS warning light and troubleshoot the ABS system.
*
1: If a malfunction is detected in ABS the TRAC OFF indicator light lights up instead of the TRAC indicator
light.
*
2: The TRAC indicator light does not light up even if an error is detected
*3: If a malfunction is detected, the TRAC OFF indicator light lights up instead of the TRAC indicator light.
*4: Depending on the malfunction, the TRAC indicator light does not light up. BR±128
± BRAKE SYSTEMTRACTION CONTROL SYSTEM (TRAC)
Page 1000 of 2543
ConditionsSTD Voltage (V)Symbols
(Terminal No.)
IG switch ON
IG switch ON
IG switch ON
Slowly turn right front wheel.
IG switch ON
Slowly turn left front wheel.
IG switch ON
Slowly turn right rear wheel.
IG switch ON
Slowly turn left rear wheel.
IG switch ON
Slowly turn right front wheel.
IG switch ON
Slowly turn left front wheel.
IG switch ON
Slowly turn right rear wheel.
IG switch ON
Slowly turn left rear wheel.
IG switch ON, Vehicle parked on a level surface
IG switch ON, Vehicle parked on a level surface
IG switch ON
AC generation
AC generation
AC generation
Pulse generation
Pulse generation
Pulse generation
Pulse generation
± BRAKE SYSTEMTRACTION CONTROL SYSTEM (TRAC)BR±131
Page 1001 of 2543
TRAC ECU:
ConditionSTD Voltage (V)Symbols
(Terminals No.)
Always
Always
IG switch ON
5 seconds after IG switch ON
Sub throttle valve fully open
5 seconds after IG switch ON
Sub throttle valve fully open
5 seconds after IG switch ON
Sub throttle valve fully open
5 seconds after IG switch ON
Sub throttle valve fully open
5 seconds after IG switch ON
Sub throttle valve fully open
5 seconds after IG switch ON
Sub throttle valve fully open
Engine idling, Main throttle valve fully closed
Engine idling, Main throttle valve fully open
IG switch ON, Sub throttle valve fully closed
IG switch ON, Sub throttle valve fully open
Idling
IG switch ON, TRAC cut switch pushed in
IG switch ON, TRAC cut switch released
IG switch ON, PKB switch ON
Fluid in M/C reservoir above MIN level
IG switch ON, PKB switch OFF
Fluid in M/C reservoir above MIN level
IG switch ON, TRAC indicator light ON
IG switch ON, TRAC OFF indicator light ON
IG switch ON, TRAC OFF indicator light OFF
Stop light switch OFF
Stop light switch ON
IG switch ON
IG switch ON
Slowly turn right front wheel
IG switch ON
Slowly turn left front wheel
IG switch ON
Slowly turn right rear wheel
IG switch ON
Slowly turn left rear wheel
Below 1.0
Below 1.0
Pulse generation
Below 1.5
Below 1.5
Below 2.0
Below 1.5
Pulse generation
Pulse generation
Pulse generation
Pulse generation
BR±132± BRAKE SYSTEMTRACTION CONTROL SYSTEM (TRAC)
Page 1007 of 2543
DTC 31 32 33 34 Speed Sensor Circuit
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.
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 magnet-
ic field emitted by the permanent magnet in the speed sensor
generates an AC voltage. Since the frequency of this AC voltage
changes in direct proportion to the speed of the rotor, the frequen-
cy is used by the ECU to detect the speed of each wheel.
Diagnostic Trouble Code Detecting ConditionTrouble areaDTC No.
Detection of any of conditions (1) through
(3):
At vehicle speed of 10 km/h (6 mph) or
more, pulses are not input for 5 sec.
Momentary interruption of the vehicle
speed sensor signal occurs at least 7
times in the time between switching the
ignition switch ON and switching it OFF.
Abnormal fluctuation of speed sensor
signals with the vehicle speed 20 km/h
(12 mph) or more.
Right front, left front, right rear and left
rear speed sensor.
Open or short in each speed sensor circuit.
ECU
BR±138± BRAKE SYSTEMTRACTION CONTROL SYSTEM (TRAC)
