1998 TOYOTA LAND CRUISER brake

F02201
DLC1 E1
TcTs
BR3904
0.13 sec. 0.13 sec.
ON
OFF
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-51 1
704 Author
: Date
:
2004 LAND CRUISER (RM1071U)Hand-held tester displayReference Value* Measurement Item
SHIFT POSITIONShift lever position
FAIL
P, N
R
D
4
3
2
L
THROTTLEThrottle sensor reading0 to 125 deg.
*: If no conditions are specifically stated for ºIdlingº, it means the shift lever is in the N or P position, the A/C
switch is OFF and all accessory switches are OFF.
5. SPEED SENSOR SIGNAL CHECK (TEST MODE)
HINT:

When replacing the yaw rate sensor or ECU, make sure
to perform a yaw rate sensor zero point calibration.

If the ignition switch is turned from the ON to the ACC or
LOCK position during test mode, DTC will be erased.
(a) In case of not using hand-held tester:
Check the speed sensor signal.
(1) Turn the ignition switch OFF.
(2) Using SST, connect terminals Ts and E
1 of the
DLC1.
SST 09843-18020
(3) Start the engine.
(4) Check that the ABS warning light blinks.
HINT:
If the ABS warning light does not blink, inspect the ABS warning
light circuit and Ts circuit (See page DI-627 and DI-653).
(5) Keep the vehicle in the stationary condition on the
flat place for 6 sec. or more.
(6) Shift the transfer lever in the L4 position and turn the
center diff. lock switch ON.
(7) Shift the transfer lever back.

BR3893
Malfunction Code (Example Code 72, 76)
72 6
7
ON
OFF
0.5 sec. 0.5 sec. 0.5 sec. 0.5 sec.1.5 sec.
2.5 sec. 4 sec.
Repeat DI-512
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
705 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(8) Leaving the vehicle in the stationary condition and
the brake pedal in a free condition for 1 sec. or
more, continue to depress the brake pedal with a
force of 98 N (10 kgf, 22 lbf) or more for 1 sec. or
more.
(9) Leaving the vehicle in the stationary condition, de-
press the brake pedal with a force of 980 N (100 kgf,
221 lbf) or more quickly.
HINT:
At this time, the ABS warning light comes on for 3 sec.
(10) Drive the vehicle straight forward.
When driving the vehicle with a speed faster than 28
mph (45 km/h) for several seconds, check that the
ABS warning light goes off.
HINT:
There is a case that the sensor check is not completed if the ve-
hicle has its wheels spun or its steering wheel turned during this
check.
(11) Stop the vehicle.
(12) Using SST, connect terminals Tc and E
1 of the
DLC1 or Tc and CG of the DLC3.
SST 09843-18020 or 09843-18040
(13) Read the number of blinks of the ABS warning light.
HINT:

See the list of DTC on the next page.

If every sensor is normal, a normal code is output (A cycle
of 0.25 sec. ON and 0.25 sec. OFF is repeated).

If 2 or more malfunctions are indicated at the same time,
the lowest numbered code will be displayed 1st.
(14) After doing the check, disconnect the SST from ter-
minals of the DLC1 or terminals of the DLC1 and
DLC3, and turn the ignition switch OFF.
SST 09843-18020 or 09843-18040

F06425
Hand-held
Tester
DLC3
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-513
706 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(b) In case of using hand-held tester:
Check the sensor signal.
(1) Hook up the hand-held tester to the DLC3.
(2) Do step (3) to (10) on the previous page.
(3) Read the DTC by following the prompts on the tes-
ter screen.
HINT:
Please refer to the hand-held tester operator's manual for fur-
ther details.
DTC of speed sensor signal check function:
Code No.DiagnosisTrouble Area
C1271 / 71Low output voltage in right front speed sensor

Right front speed sensor

Sensor installation

Sensor rotor
C1272 / 72Low output voltage in left front speed sensor

Left front speed sensor

Sensor installation

Sensor rotor
C1273 / 73Low output voltage in right rear speed sensor

Right rear speed sensor

Sensor installation

Sensor rotor
C1274 / 74Low output voltage in left rear speed sensor

Left rear speed sensor

Sensor installation

Sensor rotor
C1275 / 75Abnormal change in output voltage of right front speed
sensorRight front speed sensor rotor
C1276 / 76Abnormal change in output voltage of left front speed
sensorLeft front speed sensor rotor
C1277 / 77Abnormal change in output voltage of right rear speed
sensorRight rear speed sensor rotor
C1278 / 78Abnormal change in output voltage of left rear speed
sensorLeft rear speed sensor rotor
C1279 / 79Deceleration sensor is faulty
Deceleration sensor

Sensor installation
C1281 / 81Master cylinder pressure sensor output signal is faultyMaster cylinder pressure sensor
C1282 / 82Transfer indicator (center diff. lock) switch malfunctionTransfer indicator (center diff. lock) switch
C1283 / 83Transfer L4 position switch malfunctionTransfer L4 position switch
6. In case of not using hand-held tester:
VSC SENSOR CHECK (TEST MODE)
NOTICE:
When having replaced the yaw rate sensor, deceleration
sensor and/or ECU, perform a zero point calibration of the
yaw rate and deceleration sensors (See step 8.).
HINT:
If the ignition switch is turned from the ON to the ACC or LOCK
during test mode, DTC will be erased.

F02201
DLC1 E1
TcTs
BR3904
0.13 sec. 0.13 sec.
ON
OFF
F02135
Start Position
End PositionWithin ± 5° DI-514
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
707 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(a) Procedures for test mode:
(1) Turn the ignition switch OFF.
(2) Check that the shift lever is in the P position, and
turn the steering wheel to the neutral position.
(3) Using SST, connect terminals Ts and E
1 of the
DLC1.
SST 09843-18020
(4) Start the engine.
(5) Check that the VSC TRAC warning light blinks.
HINT:
If the VSC TRAC warning light does not blink, inspect the VSC
TRAC warning light circuit and Ts terminal circuit (See page
DI-631 and DI-653).
Turn the steering wheel either to the left or right 450° or
more from the vehicle stationary condition, and turn back
the steering wheel to the straight ahead position.
(b) Keep the vehicle stationary on a level place for 1 sec. or
more.
(c) Check the yaw rate sensor.
Shift the shift lever to the D position and drive the vehicle
at a vehicle speed of approx. 5 km/h (3 mph), turn the
steering wheel either to the left or right 90° or more, and
maintain this angle until the vehicle has turned 180°.
Stop the vehicle and shift the shift lever to the P
position. Check that the VSC buzzer sounds for 3
sec.
If the VSC buzzer sounds, the sensor check is in normal
completion.
If the VSC buzzer does not sound, do the sensor check again.
If the VSC buzzer still does not sound, check the VSC buzzer
circuit, then do the sensor check again.
Trouble AreaSee page
VSC buzzer circuitDI-649
HINT:

Make a 180° turn. At the end of the turn, the direction of
the vehicle should be within 180°± 5° of its start position.

Do not spin the wheels.
(d) Read the DTC.
(1) Using SST, connect terminals Tc and E
1 of the
DLC1 or Tc and CG of the DLC3.
SST 09843-18020 or 09843-18040
(2) Read the number of times the VSC TRAC warning
light blinks.
HINT:

See the list of DTC shown on the next page.

If every sensor is normal, a normal code is output. (A cycle
of 0.25 sec. ON and 0.25 sec. OFF is repeated.)

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
F06425
Hand-held
Tester
DLC3
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-515
708 Author
: Date
:
2004 LAND CRUISER (RM1071U)

If 2 or more malfunctions are indicated at the same time,
the lowest numbered code will be displayed 1st.
(3) After doing the check, disconnect the SST from ter-
minals of the DLC1 or terminals of the DLC1 and
DLC3 and turn the ignition switch OFF.
SST 09843-18020 or 09843-18040
7. In case of using hand-held tester:
CHECK VSC SENSOR SIGNAL
NOTICE:
When having replaced the yaw rate sensor, deceleration
sensor and/or ECU, perform a zero point calibration of the
yaw rate and deceleration sensors (See step 7.). Make sure
that this operation should be done before starting the fol-
lowing.
(a) Hook up the hand-held tester to the DLC3.
(b) Do steps (a)-(2) and from (a)-(4) to (c) on the previous
page.
(c) Read the DTC by following the prompts on the tester
screen.
HINT:
Please refer to the hand-held tester operator's manual for fur-
ther details.
DTC of the VSC sensor check function:
Code No.DiagnosisTrouble Area
C0371 / 71Yaw rate sensor output signal malfunction
Yaw rate sensor

Yaw rate sensor circuit

F02201
DLC1
E
1
Ts DI-516
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
709 Author
: Date
:
2004 LAND CRUISER (RM1071U)
8. IF NECESSARY, PERFORM ZERO POINT CALIBRA-
TION OF YAW RATE AND DECELERATION SENSORS
HINT:

When having replaced the yaw rate sensor, deceleration
sensor or/and the ECU, make sure to perform a yaw rate
and deceleration sensors zero point calibration.

This operation is also required when the deceleration
sensor or yaw rate sensor has been replaced since the
calibrated zero point of both sensors will be erased.
NOTICE:

While obtaining the zero point, do not vibrate the ve-
hicle by tilting, moving or shaking it and keep it in a
stationary condition. (Do not start the engine.)

Be sure to do this on a level surface (within an inclina-
tion of 1 %).
(a) Clear the zero point of the yaw rate and deceleration sen-
sors.
(1) Shift the shift lever to P range.
(2) Turn the ignition switch ON in a stationary condition.
(3) With the ignition switch ON, using SST, repeat a
cycle of short and open between terminals Ts and
E
1 of the DLC1 4 times or more within 8 sec. Check
that the VSC warning light is lit indicating the re-
corded zero point is erased.
SST 09843-18020
(4) Turn the ignition switch OFF.
(b) Obtain the zero point of the yaw rate sensor.
(1) Disconnect terminals Ts and E
1 of the DLC1.
(2) Turn the ignition switch ON.
HINT:
The vehicle should be in a stationary condition with the shift le-
ver in the P position.
(3) Check that the lighted VSC warning light goes off
about 15 sec. after the ignition switch is turned ON.
HINT:
Even if the ignition is not turned OFF in step (a)-(4) and remains
ON, a yaw rate sensor zero point calibration can be completed.
In this case, the VSC warning light is lit about 15 sec. and starts
blinking. (Normal code)
(4) After ensuring that the VSC warning light remains
OFF for 2 sec., turn the ignition switch OFF.
HINT:
If the ignition switch is not turned OFF in step (a)-(4), ensure
the blinking of the VSC warning light for 2 sec. and turn the igni-
tion switch OFF.

F02201
DLC1
E
1
Ts
BR3904
0.13 sec. 0.13 sec.
ON
OFF
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-517
710 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(c) Perform a deceleration sensor zero point calibration.
NOTICE:
After step (b) (a yaw rate sensor zero point calibration), the
VSC warning light goes off. At this time, if the vehicle is
driven without performing step (c) (a deceleration sensor
zero point calibration), deceleration sensor zero point cal-
ibration malfunction will be detected and the VSC warning
light will light up. Therefore, perform step (c) right after step
(b).
(1) Using SST, connect terminals Ts and E
1 of the
DLC1.
SST 09843-18020
(2) Turn the ignition switch ON.
HINT:
Keep the vehicle in a stationary condition with the shift lever in
the P position.
(3) After turning the ignition switch ON, check that the
VSC warning light is lit for about 4 sec. and then
starts quick blinking at 0.13 sec. intervals.
(4) After ensuring the blinking of the VSC warning light
for 2 sec., turn the ignition switch OFF.
(5) Remove the SST and disconnect terminals Ts and
E1 of the DLC1.
SST 09843-18020

DIC91-01
DI-526- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
719 Author
: Date
:
2004 LAND CRUISER (RM1071U)
PROBLEM SYMPTOMS TABLE
If a normal code is displayed during the DTC check 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.
SymptomSuspected AreaSee page
ABS does not operate
BA does not operate
Only when 1. to 4. are all normal and the problem is still
occurring, replace the skid control ECU.
1. Reconfirm the DTC and check that the normal code is
output.
2. IG power source circuit
3. Speed sensor circuit
4. Check the hydraulic brake booster with a checker or
hand-held tester.
If abnormal, check the hydraulic circuit for leakage (See
page DI-655).
DI-505
DI-558
DI-615
BR-40
ABS does not operate efficiently
BA does not operate
Only when 1. to 4. are all normal and the problem is still
occurring, replace the skid control ECU.
1. Reconfirm the DTC and check that the normal code is
output.
2. Speed sensor circuit
3. Stop light switch circuit
4. Check the hydraulic brake booster with a checker or
hand-held tester.
If abnormal, check the hydraulic circuit for leakage (See
page DI-655).
DI-505
DI-615
DI-573
BR-40
ABS warning light abnormal1. ABS warning light circuit
2. Skid control ECUDI-627
IN-36
DTC check cannot be done
Only when 1. to 4. are all normal and the problem is still
occurring, replace the skid control ECU.
1. ABS warning light circuit
2. VSC OFF indicator light, center diff. lock indicator switch
circuit
3. Center diff. lock indicator switch circuit
4. Tc terminal circuit
DI-627
DI-645
DI-612
DI-651
Speed sensor signal check cannot be done1. Ts terminal circuit
2. Skid control ECUDI-653
IN-36
TRAC does not operate
Only when 1. to 4. are all normal and the problem is still
occurring, replace the skid control ECU.
1. Check the DTC, reconfirming that the normal code is
output.
2. IG power source circuit
3. Check the hydraulic circuit for leakage.
4. Speed sensor circuit
DI-505
DI-558
DI-655
DI-615
VSC does not operate
Only when 1. to 7. are all normal and the problem is still
occurring, replace the skid control ECU.
1. Check the DTC, reconfirming that the normal code is
output.
2. IG power source circuit
3. Check the hydraulic circuit for leakage.
4. Speed sensor circuit
5. Deceleration sensor circuit
6. Yaw rate sensor circuit
7. Steering angle sensor circuit
DI-505
DI-558
DI-655
DI-615
DI-570
DI-553
DI-605