2001 TOYOTA HIGHLANDER o2 sensor

BR3904
0.13 sec. 0.13 sec.
ON
OFF
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
05-775
965 Author
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8. SENSOR SIGNAL CHECK (TEST MODE)
(USING HAND-HELD TESTER)
NOTICE:
After replacing the yaw rate sensor (deceleration sensor)
and/or brake actuator assembly (skid control ECU), per-
form zero point calibration of the yaw rate sensor and de-
celeration sensor. (See step 10.)
HINT:

If the ignition switch is turned from ON to the ACC or
LOCK position during test mode, DTC of sensor check
function will be erased.

During test mode, ECU records all DTC of sensor check
function. By preforming sensor signal check, the codes
are erased if normality is confirmed. The codes left over
are the codes where an abnormality was found.
(a) Procedures for signal check:
(1) Turn the ignition switch off.
(2) Check that the shift lever position is in the P posi-
tion.
(3) Connect the hand-held tester to the DLC3.
(4) Perform the signal check (test mode) by following
the prompts on the tester screen.
[System Selection Screen]
ºDIAGNOSISº - ºOBD/MOBDº - Select the vehicle -
ºABS/VSCº - ºSIGNAL CHECKº
(5) Check that the ABS warning light and VSC warning
light blink.
HINT:
If the ABS warning light and VSC warning light do not blink, in-
spect the ABS warning light circuit and VSC warning light cir-
cuit.
Trouble areaSee Page
ABS warning light circuit05-840 or
05-844
VSC warning light circuit05-847 or
05-851
(b) Check the master cylinder pressure sensor:
(1) Leave the vehicle in a stationary condition and the
brake pedal in a free condition for 1 second or more
and quickly depress the brake pedal with a force of
98 N (10 kgf, 22 lbf) or more for 1 second or more.
HINT:
At this time, the ABS warning light remains on for 3 seconds.

F02135
Start Position
End PositionWithin ± 5° 05-776
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(c) Check the yaw rate:
(1) Shift the shift lever to the D position and drive the
vehicle at a speed of approx. 3 mph (5 km/h), and
maintain a 180° circular drive for the vehicle.
(2) Stop the vehicle and shift the shift lever to the P
position, and check that the skid control buzzer
sounds for 3 seconds.
HINT:

If the skid control buzzer sounds, the sensor check is
completed normally.

If the skid control buzzer does not sound, check the skid
control buzzer circuit (See page 05-866), then perform
the sensor check again. If the skid control buzzer still does
not sound, there is a malfunction in the VSC sensor, so
check for DTC.

Drive the vehicle in a 180° circle. At the end of the turn,
ensure that the vehicle is exactly 180° within a tolerance
of ± 5°, and facing the other direction from its original
start position.

Do not spin the wheels.
(d) Check the speed sensor:
(1) Drive the vehicle straight forward at the speed of 28
mph (45 km/h) or higher for several seconds and
check that the ABS warning light goes off.
HINT:
The sensor check may not be completed if the vehicle has its
wheels spun or its steering wheel turned during this check.
(2) Stop the vehicle.
(e) Read the DTC following the tester screen.
HINT:

Refer to the hand-held tester operator's manual for fur-
ther details.

If the check result is OK, the ABS warning light link goes
off when the brake pedal is once depressed.
9. IF NECESSARY, PERFORM ZERO POINT CALIBRA-
TION OF YAW RATE SENSOR AND/OR BRAKE AC-
TUATOR ASSY (USING SST CHECK WIRE)
NOTICE:

While obtaining the zero point, do not tilt, move or
shake the vehicle but keep it in a stationary condition.
(Do not start the engine.)

Be sure to perform the operation on a level surface
(within an inclination of 1 %).
(a) Check that the steering wheel is in the straight-ahead
position and shift the shift lever to the P position.
(b) Clear the zero point calibration:
HINT:
When replacing the yaw rate sensor only (not replace the brake
actuator assy).
(1) Turn the ignition switch to the ON position.

C52361
DLC3
Ts
CG
F46259
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
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(2) Using SST, connect and disconnect terminals Ts
and CG of the DLC3 4 times or more within 8 se-
conds.
SST 09843-18040
(3) Remove the SST from the terminals of the DLC3.
(c) Obtain the zero point calibration:
(1) Turn the ignition switch off.
(2) Using SST, connect terminals Ts and CG of the
DLC3.
SST 09843-18040
(3) Turn the ignition switch to the ON position.
(4) Keep the vehicle in a stationary condition on a level
surface for 2 seconds or more.
(5) Check that the VSC warning light blinks.
HINT:
If the VSC warning light does not blink, perform the zero point
calibration again.
(d) Remove the SST from the terminals of the DLC3.
SST 09843-18040
(e) Turn the ignition switch off.
10. IF NECESSARY, PERFORM ZERO POINT CALIBRATION OF YAW RATE SENSOR AND/OR
BRAKE ACTUATOR ASSY (USING HAND-HELD TESTER)
NOTICE:

While obtaining the zero point, do not tilt, move or shake the vehicle but keep it in a stationary
condition. (Do not start the engine.)

Be sure to perform the operation on a level surface (within an inclination of 1 %).
(a) Check that the steering wheel is in the straight-ahead position and shift the shift lever to the P position.
(b) Connect the hand-held tester to the DLC3.
(c) Turn the ignition switch to the ON position.
(d) Perform the reset memory by following the prompts on the tester screen.
HINT:
When replace the yaw rate sensor only (not replace the brake actuator assy).
[System Selection Screen]
ºDIAGNOSISº - ºOBD/MOBDº - Select the vehicle - ºABS/VSCº - ºRESET MEMORYº
(e) Perform the signal check (test mode) by following the prompts on the tester screen.
[System Selection Screen]
ºDIAGNOSISº - ºOBD/MOBDº - Select the vehicle - ºABS/VSCº - ºSIGNAL CHECKº
(f) Obtain zero point of the yaw rate sensor and deceleration sensor:
(1) Keep the vehicle in a stationary condition on a level surface for 2 seconds or more.
(2) Check that the VSC warning light blinks.

05IU9-01
Turn igniton switch ON with AUTO
and R/F switches held down.
Indicator Check
DTC Check
(Sensor Check)
(continuous operation)
DTC Check
(Sensor Check)
(stepped operation)OFF
OFF
DEF
DEF
Actuator Check
(continuous operaiton)
DEFOFF
Actuator Check
(stepped operation)OFF
DEF
If both AUTO switch and R/F switches are
not pressed at the same time.
R/F
R/FR/F
AUTO
: Indicates a switch operation
AUTOAUTO
R/F: Recirculation/Fresh
Cancel check mode and start A/C control.
I30328
w/o Navigation System
I38758
w/ Navigation System
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
PRE-CHECK
1. LIST OF OPERATION METHODS
By operating each of the A/C control switches as shown in the diagram below, it is possible to enter the diag-
nosis check mode.
2. INDICATOR CHECK
(a) Turn the ignition switch ON while pressing the A/C control
AUTO switch and R/F switch simultaneously.

I41003
w/o Navigation System
I38757
w/ Navigation System
I36113
1 Sec.
1 Sec.
ON
OFF
I30327
DTC w/o Navigation System
I38759
w/ Navigation SystemDTC 05-1 118
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
(b) Check that the indicators light up and go off at 1 second
intervals 4 times in succession.
HINT:

After the indicator check is completed, the system enters
the DTC automatically.

Press the OFF switch when desiring to cancel the check
mode.
3. DTC CHECK (SENSOR CHECK)
(a) Perform an indicator check. After the indicator check is
completed, the system enters the DTC check mode auto-
matically.
(b) Read the code displayed on the panel. Refer to the list of
codes on page 05- 1125 when reading the codes.
(Trouble codes are output at the temperature display.)

I30328
w/o Navigation System
I38758
w/ Navigation System
I30337
ECU-B Fuse Engine Room J/B
F46779
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
(c) If the slower display is desired, press the FRONT DEF
switch and change it to stepped operation. Each time the
FRONT DEF switch is pressed, the display changes by 1
step.
4. CLEARING DTC
(a) To clear diagnostic trouble code, there are 2 ways.
(1) During sensor check, press the FRONT DEF switch
and REAR DEF switch at the same time.
(2) Pull the ECU-B fuse in engine room J/B for 20 sec.
or longer to clear the DTC memory.
5. DTC CHECK USING HAND-HELD TESTER
(a) Connect the hand-held tester to the DLC3.
(b) Power switch ON (ready).
(c) Read the DTC following the prompts on the tester screen.
Please refer to the hand-held tester operator's manual
for further details.
(d) Clear the DTCs.
HINT:
After repairing the malfunctions, clear the DTC.
(1) Connect the hand-held tester to DLC3.
(2) Turn the ignition switch to the ON position.
(3) Erase the DTCs following the prompts on the tester
screen.
HINT:
Refer to the hand-held tester operator's manual for further de-
tails.

3 2 1 45678
9 1 0 111 21 31 41 51 6
DLC3
A04550
- DIAGNOSTICSAIR CONDITIONING SYSTEM
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
7. CHECK DLC3
(a) The vehicle's ECM uses ISO 9141-2 for communication.
The terminal arrangement of the DLC3 complies with
SAEJ1962 and matches the ISO 9141-2 format.
Terminal No.Connection/Voltage or ResistanceCondition
7Bus + Line/Pulse generationDuring transmission
4Chassis Ground - Body Ground/1 W or lessAlways
5Signal Ground - Body Ground/1 W or lessAlways
16Battery Positive - Body Ground/9 to 14 VAlways
8. DATA LIST
HINT:
From the DATA LIST displayed on the hand-held tester, you can read the values of the displays, sensors,
actuators and so on without parts removal. Reading the DATA LIST as the first step of troubleshooting is
one way to shorten labor time.
(a) Connect the hand-held tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) From the display on the tester, select the ºDATA LISTº.
ALL:
ItemMeasurement Item / Display
(Range)Normal ConditionDiagnostic Note
A/C SIGA/C signal / ON or OFFA/C ON: ON-
A C:
ItemMeasurement Item/Display
(Range)Normal ConditionDiagnostic Note
ROOM TEMP
Room temperature sensor
/min.: -6.5C (20.3F)
max.: 57.25C (135.05F)
Actual room temperature-
AMBI TEMP SENS
Ambient temperature sensor
/min.: -23.3C (-9.94F)
max.: 65.95C (150.71F)
Actual ambient temperature-
AMBI TEMP
Adjusted ambient temperature
/min.: -30.8C (-23.44F)
max.: 50.8C (123.44F)
Actual ambient temperature-
EVAP TEMP
Evaporator temperature sensor
/min.: -29.7C (-21.46F)
max.: 59.55C (139.19F)
Actual evaporator temperature-
SOLAR SENS-DSolar sensor (Driver side)
/min.: 0 max.: 255Changes depending on brightness
(Driver side)-
COOLANT TEMP
Engine coolant temperature
/min.: 1.3C (34.34F)
max.: 90.55C (194.99F)
Actual engine coolant temperature-
SET TEMP-D
Set temperature
(Driver side)
/min.: 0 max.: 255Actual set temperature
(Driver side)-
A/M DAMP POS-D
Air mix damper position
(Driver side)
/min.: -14% max.: 113.5%Changes depending on the set
temperature (Driver side)-

05CD2-13
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- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
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PROBLEM SYMPTOMS TABLE
If there are no DTCs output but the problem still occurs, check the circuits for each problem symptom in the
order given in the table below and proceed to the relevant troubleshooting page.
NOTICE:
When replacing the skid control ECU, sensor, etc., turn the ignition switch off.
SymptomsSuspected AreasSee page
ABS does not operate
BA does not operate
EBD does not operate
1. Check the DTC again and make sure that the normal
code is output.
2. IG power source circuit and ground circuit.
3. Speed sensor circuit
4. Check the ABS & TRAC actuator with a hand-held tes-
ter.
If abnormal, check the hydraulic circuit for leakage.
5. If the symptoms still occur even after the above circuits
in suspected areas are inspected and proved to be
normal, replace the skid control ECU.05-765
05-827
05-788
05-795
32-36
ABS does not operate efficiently
BA does not operate efficiently
EBD does not operate efficiently
1. Check the DTC again and make sure that the normal
code is output.
2. Speed sensor circuit
3. Stop lamp switch circuit
4. Check the ABS & TRAC actuator with a hand-held tes-
ter.
If abnormal, check the hydraulic circuit for leakage.
5. If the symptoms still occur even after the above circuits
in suspected areas are inspected and proved to be
normal, replace the skid control ECU.05-765
05-788
05-795
32-36
ABS warning light abnormal Remain ON1. ABS warning light circuit
2. Skid control ECU05-840
-
ABS warning light abnormal Does not light up1. ABS warning light circuit
2. Skid control ECU05-844
-
DTC of ABS check cannot be done
1. Check the DTC again and make sure that the normal
code is output.
2. TC terminal circuit
3. If the symptoms still occur even after the above circuits
in suspected areas are inspected and proved to be
normal, replace the skid control ECU.05-765
05-868
Sensor signal check cannot be done1. TS terminal circuit
2. Skid control ECU05-873
-
VSC and/or TRAC does not operate
1. Check the DTC again and make sure that the normal
code is output.
2. IG power source circuit and ground circuit.
3. Check the hydraulic circuit for leakage.
4. Speed sensor circuit
5. Deceleration sensor circuit
6. Yaw rate sensor circuit
7. Steering sensor circuit
8. If the symptoms still occur even after the above circuits
in suspected areas are inspected and proved to be
normal, replace the skid control ECU.05-765
05-827
-
05-788
05-795
05-815
05-824
05-824
05-821
SLIP indicator light abnormal1. SLIP indicator light circuit
2. Skid control ECU05-863
-