2001 TOYOTA HIGHLANDER warning

C52361
DLC3
Ts
CG
BR3904
0.13 sec. 0.13 sec.
ON
OFF 05-772
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
962 Author
: Date
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7. SENSOR SIGNAL CHECK (TEST MODE)
(USING SST CHECK WIRE)
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 9.)
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 DTCs of sensor check
functions. 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 test mode:
(1) Turn the ignition switch off.
(2) Check that the steering wheel is in the straight-
ahead position and shift the shift lever to the P posi-
tion.
(3) Using SST, connect terminals Ts and CG of the
DLC3.
SST 09843-18040
(4) Turn the ignition switch to the ON position.
(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, VSC warning light and Ts
terminal circuit.
Trouble areaSee Page
Ts and CG terminal circuit05-873
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 se-
conds.

While the ABS warning light remains on, continue to de-
press the brake pedal with a force of 98 N (10 kgf) or more.

The ABS warning light comes on for 3 seconds every time
the brake pedal operation above is performed.

F02135
Start Position
End PositionWithin ± 5°
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
05-773
963 Author
: Date
:

If master cylinder pressure sensor check can not be com-
pleted, do not depress the brake pedal frequently. It may
further reduce negative pressure and make the sensor
check difficult to complete.

If the negative pressure is insufficient, master cylinder
pressure sensor check may not be completed. In this
case, idle the engine to get enough negative pressure.

If the brake pedal is depressed while engine is stopped,
negative pressure may become insufficient and the BRL
may come on. (It runs the motor and performs incorrect
control.)
(c) Check the yaw rate sensor:
(1) Shift the shift lever to the D position and drive the
vehicle at a speed of approx. 3 mph (5 km/h), turn
the steering wheel either to the left or right 90° or
more, and maintain a 180° circular drive for the ve-
hicle.
(2) Stop the vehicle and shift the shift lever to the P
position, and check that the skid control buzzer
sounds for 3 sec.
NOTICE:
Deceleration sensor check should be completed before
performing speed sensor check.
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 DTCs.

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 signal:
(1) Drive the vehicle straight forward at 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.
NOTICE:

Before performing speed sensor check, complete
master cylinder pressure sensor and deceleration
sensor checks.

C52361
DLC3
Tc
CG
Malfunction Code (Example Code 71, 72)
ON
OFF
0.5 sec.0.5 sec.
1.5 sec.2.5 sec.
4 sec.
Repeat
71
72 05-774
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
964 Author
: Date
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Speed sensor check may not be completed if speed
sensor check is started while turning the steering
wheel or spinning the wheels.

After the ABS warning light goes off, if the vehicle
speed exceeds 50 mph (80 km/h), sensor check code
is stored again. Decelerate or stop the vehicle before
the speed reaches 50 mph (80 km/h).

If sensor check has not been completed, the ABS
warning light blinks while driving and ABS system
does not operate.
HINT:
When sensor check has been completed, the ABS warning light
goes off while driving and blinks in the test mode pattern while
standing.
(3) Using SST, connect terminals Tc and CG of the
DLC3.
SST 09843-18040
(4) Read the number of blinks of the ABS warning light
and VSC warning light.
HINT:

See the list of DTC. (See page 05-779)

If the check result is OK, the ABS warning light link goes
off when the brake pedal is once depressed.

If every sensor is normal, the normal blinking patterns are
output. (A cycle of 0.25 seconds ON and 0.25 seconds
OFF is repeated.)

If 2 or more malfunctions are detected at the same time,
the lowest numbered code will be displayed first.
(5) After performing the check, disconnect the SST
from terminals Ts and CG, Tc and CG of the DLC3
and turn the ignition switch to the off position.

BR3904
0.13 sec. 0.13 sec.
ON
OFF
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
05-775
965 Author
: Date
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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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966 Author
: Date
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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
05-777
967 Author
: Date
:
(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.

05-778
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968 Author
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HINT:
If the VSC warning light does not blink, perform the zero point calibration again.
(g) Turn the ignition switch off.

05CD2-13
05-786
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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
-