Page 1009 of 2543

(See page IN±30).
(See page IN±30).
(See page BR±62).
Remove front fender splash shield.
Disconnect speed sensor connector.
Measure resistance between terminals 1 and 2 of
speed sensor connector.
Resistance: 0.7 ± 1.7 k
Resistance: 1 M or higher
Remove rear seat cushion, seat back and quarter
trim panel.
Disconnect speed sensor connector.
Measure resistance between terminals 1 and 2 of
speed sensor connector.
Resistance: 0.7 ± 1.7 k
Measure resistance between terminals 1 and 2 of
speed sensor connector and body ground.
Resistance: 1 M or higher
Repair or replace harness or connector.
Check speed sensor.
Check for open and short in harness and connector between terminals FRO,
FLO, RRO, RLO of ABS & TRAC ECU and TRAC ECU (See page IN±30).
Front
Rear
Replace speed sensor.
NOTICE: Check the speed sensor signal last (See page BR±62).
Check for open and short in harness and connector between each speed
sensor and ECU (See page IN±30).
Repair and replace harness or connector.
INSPECTION PROCEDURE
HINT: If the same code is output from the ABS warning light, troubleshoot the ABS first. BR±140
± BRAKE SYSTEMTRACTION CONTROL SYSTEM (TRAC)
Page 1010 of 2543
(See page SA±15).
(See page SA±45).
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 SA±45).
Check the sensor rotor serrations.
No scratches or missing teeth.
Front
Rear
Check sensor rotor and sensor installation.
Check the rear speed sensor installation.
The installation bolt is tightened properly and
there is no clearance between the sensor and rear
axle carrier.
Replace speed sensor or rotor.
Check and replace ABS (& TRAC) ECU.
NOTICE: Check the speed sensor signal last (See page BR±62).
± BRAKE SYSTEMTRACTION CONTROL SYSTEM (TRAC)BR±141
Page 1011 of 2543
DTC 41 IG Power Source Circuit
CIRCUIT DESCRIPTION
This is the power source for the ECU, hence the CPU and the actuators.
DTC No. Diagnostic Trouble Code Detecting Condition Trouble area
41
When either of the following (1) or (2) is
detected:
(1) Voltage at ECU terminal IG1 is less than
9.5 V for more than 10 sec. while engine
speed is 500 RPM or higher.
(2) Voltage at ECU terminal IG1 is more than
17 V for more than 5 sec.
Battery
IC regulator
Open or short in power source circuit
ECU
BR±142± BRAKE SYSTEMTRACTION CONTROL SYSTEM (TRAC)
Page 1012 of 2543
INSPECTION PROCEDURE
Check battery positive voltage.
Voltage: 10 ± 14 V
Check and repair the charging system.
Remove TRAC ECU with connectors still
connected.
Turn ignition switch ON.
Measure voltage between terminals IG1 and
GND of TRAC ECU connector.
Voltage: 10 ± 14 V
Check voltage between terminals IG1 and GND of TRAC ECU connector.
Check and replace TRAC ECU.
Measure resistance between terminal GND of
TRAC ECU connector and body ground.
Resistance: 1 or less
Check continuity between terminal GND of TRAC ECU connector and
body ground.
Repair or replace harness or connector.
± BRAKE SYSTEMTRACTION CONTROL SYSTEM (TRAC)BR±143
Page 1013 of 2543
(See page IN±30).
Remove ECU±IG fuse from J/B No. 1.
Check continuity of ECU±IG fuse.
Continuity
Check ECU±IG fuse.
Check for short in all the harness and components
connected to ECU±IG fuse.
Check for open in harness and connector between
TRAC ECU and battery (See page IN±30).
BR±144± BRAKE SYSTEMTRACTION CONTROL SYSTEM (TRAC)
Page 1014 of 2543
DTC 43 ABS & TRAC ECU Malfunction
CIRCUIT DESCRIPTION
DTC No. Diagnostic Trouble Code Detecting Condition Trouble area
43
ABS control system or TRAC (BRAKE) control system
or communication circuit is abnormal.
ABS & TRAC ECU
Open or short in BRFA circuit
page BR±128.
Is diagnostic trouble code output for the ABS & TRAC (BRAKE)?
Perform diagnostic trouble code check on page BR±128.
Repair circuit indicated by the code
output.
INSPECTION PROCEDURE
± BRAKE SYSTEMTRACTION CONTROL SYSTEM (TRAC)BR±145
Page 1015 of 2543
Check voltage between terminal BRFA of TRAC ECU and body ground.
Remove TRAC ECU with connectors still con-
nected.
Turn ignition switch ON.
Measure voltage between terminal BRFA of TRAC
ECU and body ground.
Voltage: About 6 V (Pulse)
Check and replace TRAC ECU.
Check voltage between terminal BRFA of TRAC ECU and body ground with
TRAC ECU connector disconnected.
Disconnect TRAC ECU connector.
Measure voltage between terminal BRFA of TRAC
ECU connector and body ground.
HINT: Measure voltage within 8 seconds from the time
TRAC ECU connector is disconnected.
Voltage: See step 1.
Check and replace TRAC ECU.
Repair or replace harness or connector.
Check and replace ABS & TRAC ECU.
Check for open and short in harness and connector between ABS & TRAC
ECU and TRAC ECU (See page IN±30).
BR±146± BRAKE SYSTEMTRACTION CONTROL SYSTEM (TRAC)
Page 1016 of 2543
DTC 44 NE Signal Circuit
CIRCUIT DESCRIPTION
The TRAC ECU receives engine speed signals (NE signals) from the ECM.
DTC No. Diagnostic Trouble Code Detecting Condition Trouble area
44
No signal is input to terminal NEO 0.24 sec.
after traction control is initiated.
Open or short in NEO circuit
ECM
TRAC ECU
± BRAKE SYSTEMTRACTION CONTROL SYSTEM (TRAC)BR±147