TOYOTA HIGHLANDER 2001 Service Repair Manual
Page 781 of 2572
W04200
Normal Signal Waveform
1 V / Division2 m/s / DivisionGND
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
05-799
989 Author: Date:
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
5 INSPECT SPEED SENSOR AND SENSOR ROTOR SERRATIONS
INSPECTION USING OSCILLOSCOPE
(a) Connect the oscilloscope to terminals RR+ - RR- or RL+
- RL- of the skid control ECU.
(b) Drive the vehicle at approximately 19 mph (30 km/h), and
check the signal waveform.
OK:
A waveform as shown in a figure should be output.
HINT:
As the vehicle speed (wheel revolution speed) increases,
a cycle of the waveform narrows and the fluctuation in the
output voltage becomes greater.
When noise is identified in the waveform on the oscillo-
scope, error signals are generated due to the speed sen-
sor rotor's scratches, looseness or foreign matter at-
tached to it.
NG Go to step 6
OK
REPLACE REAR SPEED SENSOR (SEE PAGE 32-42 (FF) OR 32-44 (4WD))
Page 782 of 2572
F10178
OK
NG Skid Control Sensor
BR3795OKNG
8.0 NVm
(82 kgfVcm,71 in.Vlbf)
No Clearnace
05-800
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
990 Author: Date:
6 INSPECT REAR SPEED SENSOR INSTALLATION
2WD:
(a) Check the sensor installation.
OK:
There is no clearance between the sensor and rear
axle carrier.
4WD:
(a) Check the speed sensor installation.
OK:
There is no clearance between the sensor and rear
axle carrier.
The installation bolt is tightened properly.
Torque: 8.0 NVm (82 kgfVcm, 71 in.Vlbf)
NOTICE:
Check the speed sensor signal after replacement
(see page 05-765).
NG REPLACE REAR SPEED SENSOR
(SEE PAGE 32-42 (FF) OR 32-44 (4WD))
OK
Page 783 of 2572
F08575
Sensor Rotor
R00948
Sensor Rotor
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
05-801
991 Author: Date:
7 INSPECT SPEED SENSOR ROTOR AND SENSOR TIP
2WD:
(a) Remove the skid control sensor (see page 32-42).
(b) Check the sensor tip.
OK:
No scratches or foreign matter on the sensor tip.
4WD:
(a) Remove the rear speed sensor (See page 32-44).
(b) Check the sensor tip.
OK:
No scratches or foreign matter on the sensor tip.
2WD:
(a) Check the sensor rotor serrations.
OK:
No scratches, missing teeth or foreign matter on the
rotor.
4WD:
(a) Remove the rear drive shaft (See page 30-45).
(b) Check the sensor rotor serrations.
OK:
No scratches, missing teeth or foreign matter.
HINT:
If foreign matter is attached, remove it and after reassembling,
check the output waveform.
NOTICE:
Check the speed sensor signal after the replacement
(see page 05-765).
NG CLEAN OR REPLACE SPEED SENSOR AND
SENSOR ROTOR SERRATIONS
OK
REPLACE ABS & TRACTION ACTUATOR ASSY (SEE PAGE 32-37)
Page 784 of 2572
05-802
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
992 Author: Date:
DTC C0226/21 SFR SOLENOID CIRCUIT
DTC C0236/22 SFL SOLENOID CIRCUIT
DTC C0246/23 SRR SOLENOID CIRCUIT
DTC C0256/24 SRL SOLENOID CIRCUIT
DTC C1225/25 SMC SOLENOID CIRCUIT
CIRCUIT DESCRIPTION
This solenoid goes on when signals are received from the ECU and controls the pressure acting on the wheel
cylinders to control the braking force.
DTC No.DTC Detecting ConditionTrouble Area
C0226/21Open or short circuit in front right solenoid circuit (SFRR or
SFRH) continues for 0.05 sec. or more.ABS & TRAC actuator
Each solenoid circuit
C0236/22Open or short circuit in front left solenoid circuit (SFLR or
SFLH) continues for 0.05 sec. or more.ABS & TRAC actuator
Each solenoid circuit
C0246/23Open or short circuit in rear right solenoid circuit (SRRR or
SRRH) continues for 0.05 sec. or more.ABS & TRAC actuator
Each solenoid circuit
C0256/24Open or short circuit in rear left solenoid circuit (SRLR or
SRLH) continues for 0.05 sec. or more.ABS & TRAC actuator
Each solenoid circuit
C1225/25
When any of the following (1 to 5) is detected:
(1) All the following conditions continues for at least 0.05
seconds.
When switching solenoid (SM1 or SM2) outputs ON sig-
nal.
Over current.
(2) All the following conditions continues for at least 0.05
seconds.
When switching solenoid (SM1 or SM2) outputs OFF sig-
nal.
Open circuit.
(3) All the following conditions continues for at least 0.05
seconds.
When switching solenoid (SM1 or SM2) outputs OFF sig-
nal.
Output current monitor is more than 0.15 A.
(4) All the following conditions continues for at least 0.05
seconds.
When switching solenoid (SM1 or SM2) outputs ON sig-
nal.
Output current is more than 0.348 A.
Difference between current monitor and target value ex-
ceeds 2, continues for between 0.1 sec. and 0.15 sec.
(5) All the following conditions continues for at least 0.2
seconds.
When switching solenoid (SM1 or SM2) outputs ON sig-
nal.
Output current is more than 0.348 A.
1. More than 2.08
2. Less than 0.48
ABS & TRAC actuator
Each solenoid circuit
05CDP-15
Page 785 of 2572
F46309
Skid Control ECU with Actuator F7
FL Block
FL MAIN
Battery
EA EB ABS1+BS
GND1
J4
J/C 1831
32
AB W
W-BS27
S27 W-B
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
05-803
993 Author: Date:
WIRING DIAGRAM
INSPECTION PROCEDURE
1 RECONFIRM DTC
HINT:
This code is detected when a problem is determined in the brake actuator assy.
The solenoid circuit is in the brake actuator assy.
Therefore, solenoid circuit inspection and solenoid unit inspection cannot be performed. Be sure to check
if the DTC code is output before replacing the brake actuator assy.
(a) Clear the DTCs(see page 05-765).
(b) Turn the ignition switch to the ON position.
(c) Are the same DTCs recorded?
NO PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05-786).
YES
REPLACE ABS & TRACTION ACTUATOR ASSY (SEE PAGE 32-37)
Page 786 of 2572
05-804
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
994 Author: Date:
DTC C0273/13 OPEN CIRCUIT IN ABS MOTOR RELAY
CIRCUIT
DTC C0274/14 SHORT CIRCUIT IN ABS MOTOR RELAY
CIRCUIT
DTC C1361/91 SHORT CIRCUIT IN ABS MOTOR FAIL SAFE
RELAY CIRCUIT
CIRCUIT DESCRIPTION
The VSC motor relays consist of 2 relays are included in the ABS R/B.
The VSC cut relay is turned on after turning the ignition switch to the ON position. If the DTCs in the
ABS pump motor circuit are memorized, the VSC cut relay cuts off the power supply to the VSC motor
relay and performs the fail safe.
While any of the ABS, BA, TRAC and VSC is operating, the skid control ECU (included in the actuator)
turns the VSC motor relay on to operate the actuator pump motor.
If the voltage applied to the VSC motor relays (+BM) drops below the condition that detects the DTCs
due to the shortage of the battery or alternator output, the DTCs may be memorized.
DTC No.DTC Detecting ConditionTrouble Area
C0273/13
When any of the following (1 to 2) is detected:
(1) All the following conditions continues for at least 0.2
seconds.
IG1 voltage is between 9.5 and 17.2 V.
During initial check.
ABS, BA, TRAC, and VSC are in operation.
Relay contact is open when the relay is ON.
(2) All the following conditions continues for at least 0.2
seconds.
IG1 voltage is less than 9.5 V.
Relay contact remains open when the relay is ON.
ABS No.2 fuse
ABS MTR relay
ABS MTR relay circuit
ABS R/B
ABS cut relay
ABS cut relay circuit
C0274/14The following condition continue for at least 4 seconds.
Relay contact is closed when the relay is OFF.
ABS No.2 fuse
ABS MTR relay
ABS MTR relay circuit
ABS R/B
ABS cut relay
ABS cut relay circuit
C1361/91
All the following conditions continues for at least 4 seconds.
Immediately after turning IG switch to the ON position.
Relay contact is closed when fail-safe relay is OFF.
ABS No.2 fuse
ABS MTR relay
ABS MTR relay circuit
ABS R/B
ABS cut relay
ABS cut relay circuit
05F1Q-09
Page 787 of 2572
F46308
Skid Control ECU with Actuator
ABS MTR Relay
ABS CUT Relay
FL MAIN
BatteryS27
S27
S27
S27
ABS2 F7
FL Block ABS R/BR+
MR
BM
MRF 12
3 5
91415 45
5
55
55
555
1
2 35
12
B
W B-OLG
W-L
B-R
G-RB-O
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
05-805
995 Author: Date:
WIRING DIAGRAM
Page 788 of 2572
F40458
ABS2 FL BLOCK
05-806
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
996 Author: Date:
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 when using the hand-held tester and start from step 2 when not using the
hand-held tester.
1 PERFORM ACTIVE TEST BY HAND-HELD TESTER(ABS MOTOR RELAY
OPERATION)
(a) Connect the hand-held tester to the DLC3.
(b) Start the engine.
(c) Select the ACTIVE TEST mode on the hand-held tester.
(d) Check the operation sound of the ABS motor individually when operating it with the hand-held tester.
ItemVehicle Condition / Test DetailsVehicle Condition / Test Details
ABS MOT RELAYABS motor relay / ON or OFFON : Motor relay ON
OK:
The operation sound of the ABS motor should be heard.
NG Go to step 2
OK
REPLACE ABS & TRACTION ACTUATOR ASSY (SEE PAGE 32-37)
2 INSPECT FUSE(ABS2 FUSE)
(a) Remove ABS2 fuse from the FL BLOCK.
(b) Check continuity of ABS2 fuse.
Standard:
ABS No.1 fuseBelow 1W (Continuity)
NG CHECK FOR SHORT IN ALL HARNESS AND
CONNECTOR CONNECTED TO FUSE AND
REPLACE FUSE
OK
Page 789 of 2572
I37487
ABS R/B:
5
B57491
B16200
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
05-807
997 Author: Date:
3 CHECK TERMINAL VOLTAGE(VSC MOTOR RELAY 5 TERMINAL OF ABS R/B)
(a) Remove the VSC MTR relay from the ABS R/B.
(b) Turn the ignition switch to the ON position.
(c) Measure the voltage according to the value(s) in the table
below.
Standard:
Tester ConnectionSpecified Condition
Terminals 5 - Body ground10 to 14 V
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
4 INSPECT VSC MOTOR RELAY
(a) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionConnectionSpecified resistance
3 - 5Always10 kW or higher (No conti-
nuity)
3 - 5Apply B+ between termi-
nal 1 and 2Below 1 W
NG REPLACE VSC MOTOR RELAY
OK
5 INSPECT VSC CUT RELAY
(a) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionConnectionSpecified resistance
3 - 5Always10 kW or higher (No conti-
nuity)
3 - 5Apply B+ between termi-
nal 1 and 2Below 1 W
NO REPLACE VSC CUT RELAY
OK
Page 790 of 2572
I37488
Skid Control ECU
(harness side connector)
BM
3
ABS R/B:
S27
I37487
5
3
ABS R/B:
05-808
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
998 Author: Date:
6 CHECK HARNESS AND CONNECTOR(VSC MOTOR RELAY - SKID CONTROL
ECU)
(a) Disconnect the skid control ECU connector.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
S27-2 (BM) - 3 (ABS R/B)Below 1 W
(c) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
S27-2 BM - Body ground10 kW or higher
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
7 CHECK HARNESS AND CONNECTOR(VSC MOTOR RELAY - SKID CONTROL
RELAY)
(a) Remove the ABS motor relay and skid control relay from
ABS R/B.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
5 (ABS MOTOR Relay) -
3 (Skid Control Relay)Below 1 W
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPLACE ABS & TRACTION ACTUATOR ASSY (SEE PAGE 32-37)