1996 TOYOTA LAND CRUISER light

R04751
DI5LV−02
F00006
DLC1Short Pin
F00007
DLC1
E1Tc
DI−190
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
1996 LAND CRUISER (RM451U)
PRE−CHECK
1. DIAGNOSIS SYSTEM
(a) Check the indicator.
When the ignition switch is turned ON, check that the ABS
warning light goes on for 3 seconds.
HINT:
If the indicator check result is not normal, proceed to trou-
bleshooting for the ABS warning light circuit (See page
DI−230 ).
When the transfer is in L position (center dif ferential lock),
the ABS does not operate and the ABS warning light
stays ON.
(b) Check the DTC. (1) Confirm that the center differential is free.
(2) Disconnect the short pin from the DLC1.
(3) Using SST, connect terminals Tc and E
1 of the
DLC1.
SST 09843−18020
(4) Turn the ignition switch ON.
(5) Read the DTC from the ABS warning light on the combination meter.
HINT:
If no code appears, inspect the diagnostic circuit or ABS
warning light circuit (See page DI−233 or DI−230 ).
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R01346
Normal Code
0.25 sec.
0.25 sec.
2 sec.
ON
OFF
ON
OFF 0.5 sec. 0.5 sec.
Code 11 and 21
4 sec.
1.5 sec.
2.5 sec.
Code 11 Code 21
BR1804
F00006DLC1 Short Pin
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
DI−191
1996 LAND CRUISER (RM451U)
As an example, the blinking patterns for normal code and
codes 11 and 21 are shown in the illustration.
(6) Code are explained in the code table on page
DI−196 .
(7) After completing the check, disconnect terminals Tc
and E
1, and turn off the display.
If 2 or more malfunctions are indicated at the same time the low-
est numbered DTC will be displayed 1st.
(c) Clear the DTC.
(1) Confirm that the center differential is free.
(2) Using SST, connect terminals Tc and E
1 of the
DLC1 and remove the short pin from the DLC1.
SST 09843−18020
(3) Turn the ignition switch ON.
(4) Clear the DTC stored in ECU by depressing the
brake pedal 8 or more times within 3 seconds.
(5) Check that the warning light shows the normal
code.
(6) Remove the SST from the terminals of the DLC1.
SST 09843−18020
(7) Connect the short pin to the DLC1.
HINT:
Cancellation can also be done by removing the ECU −B fuse,
but in this case, other memory systems will also be cancelled
out.
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N09348
Interface BoxHarness VehicleTOYOTA
Tester
Hand
−held
TOYOTA Break −out− box
F00007
DLC1
Ts Tc
E
1
BR3904
0.25 sec. 0.25 sec.
ON
OFF
DI−192
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
1996 LAND CRUISER (RM451U)
(d) Using TOYOTA break −out− box and TOYOTA hand− held
tester, measure the ECU terminal values.
(1) Hook up the T OYOTA hand−held tester and TOYO-
TA break−out−box to the vehicle.
(2) Read the ECU input/output values by following the prompts on the tester screen.
HINT:
TOYOTA hand −held tester has a ”Snapshot ” function. This re-
cords the measured values and is effective in the diagnosis of
intermittent problems.
Please refer to the TOYOTA hand−held tester/TOYOTA break
out−box operators manual for further details.
2. SPEED SENSOR SIGNAL AND DECELERATION SEN-
SOR CHECK
(a) Check the speed sensor signal. (1) Conform that the center differential is free.
(2) Turn the ignition switch OFF.
(3) Using SST, connect terminals Ts and E
1 of the
DLC1.
SST 09843−18020
(4) Start the engine.
(5) Check that the ABS warning light blinks.
HINT:
If the ABS warning light does not blink, inspect the ABS warning
light circuit (See page DI−230).
(6) Drive vehicle straight forward.
HINT:
Drive vehicle faster than 45 km/h (28 mph) for several seconds.
(7) Stop the vehicle.
(8) Using SST, connect terminals Tc and E
1 of the
DLC1.
SST 09843−18020
(9) Read the number of blinks of the ABS warning light.
HINT:
See the list of DTC on page DI−190 .
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 malfunction are indicated at the same time, the low-
est numbered code will be displayed 1st.
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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
F00007
E1
Ts
DLC1
R05599
0.13 sec.
0.13 sec.
3 sec.
ON
OFF
R05037
860 
30 mm
33.86  1.18 in.
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
DI−193
1996 LAND CRUISER (RM451U)
(10) After doing the check, disconnect terminals Ts and
E
1, Tc and E1 of the DLC1, and turn the ignition
switch OFF.
(b) Deceleration sensor detection point check. (1) Confirm that the center differential is free.
(2) Turn the ignition switch OFF.
(3) Using SST, connect terminals Ts and E
1 of the
DLC1.
SST 09843−18020
(4) Start the engine.
(5) Check that the ABS warning light blinks.
HINT:
If the ABS warning light does not blink, inspect the ABS warning
light circuit (See page DI−230).
(6) Jack up the rear side of the vehicle slowly.
HINT:
When measuring the height, measure at the center of the lower
body of the vehicle. (7) Check that the warning light blinks.
If the warning light turns on, inspect the deceleration sensor
installation. If the sensor installation is OK, replace the decel-
eration sensor. (8) Jack down the vehicle slowly.
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R05038
780  30 mm
30.71  1.18 in.
BR1865
0.13 sec.
0.13 sec.
ON
OFF
R05596
0.13 sec.
Braking
0.13 sec.
R05597
0.13 sec. 0.13 sec.
Braking
DI−194
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
1996 LAND CRUISER (RM451U)
(9) Jack up the front side of the vehicle slowly, as
shown.
HINT:
When measuring the height, measure at the center of the lower
body of the vehicle. (10) Check that the warning light blinks.
If the warning light turns on, inspect the deceleration sensor
installation. If the sensor installation is OK, replace the decel-
eration sensor.
(11) Jack down the vehicle slowly.
(c) Deceleration sensor operation check. (1) Drive the vehicle straight ahead at about 20 km/h
(12.4 mph) or more, lightly depress the brake pedal.
(2) Check that there is no change in the warning light pattern.
(3) Drive the vehicle straight ahead at about 20 km/h (12.4 mph) or more, and depress the brake pedal
moderately.
(4) Check that the warning light turns on while braking.
(5) Drive the vehicle straight ahead at about 20 km/h (12.4 mph) or more, and depress the brake pedal
strongly.
(6) Check that the warning light pattern changes while braking, as shown.
If the operation is not as specified, inspect the deceleration sen-
sor installation. If the sensor installation is OK, replace the de-
celeration sensor. (7) Stop the vehicle and turn the ignition switch OFF.
(8) Remove SST from the terminals Ts and E
1 of the
DLC1.
SST 09843−18020
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DI5LX−02
W03004
Rear Speed Sensor
Rear Speed Sensor Rotor
Front Speed Sensor
Stop Light Switch
ABS Warning Light
Deceleration Sensor
DLC1
ABS ECU
ABS Actuator
ABS Relay
Front Speed Sensor Rotor
DI−198
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
1996 LAND CRUISER (RM451U)
PARTS LOCATION
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DI5LZ−03
DI−200
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
1996 LAND CRUISER (RM451U)
PROBLEM SYMPTOMS TABLE
If a normal code is displayed during the DTC check but the problem still o\
ccurs, check the circuits for each
problem symptom in the order given in the table below and proceed to the releva\
nt troubleshooting page.
SymptomsSuspected AreaSee page
ABS does not operate
Only when 1 − 4 are all normal and the problem is still occurring, replace the ABS
ECU
2. Check the DTC reconfirming that the normal code is output
3. IG power source circuit
4. Speed sensor circuit
5. Check the ABS actuator with a checker
If abnormal, check the hydraulic circuit for leakage (See page DI−237)
DI−190
DI−215
DI−210
BR−53
ABS does not operate effi-
ciently
Only when 1 − 4 are all normal and the problem is still occurring, replace the ABS
ECU
1. Check the DTC reconfirming that the normal code is output
2. Speed sensor circuit
3. Stop light switch circuit
4. Check the ABS actuator with a checker
If abnormal, check the hydraulic circuit for leakage (See page DI−237)
DI−190
DI−210
DI−228
BR−53
ABS warning light abnormal1. ABS warning light circuit
2. ABS ECUDI−230 −
DTC check cannot be done
Only when 1 and 2 are all normal and the problem is still occurring, rep\
lace the
ABS ECU
1. ABS warning light circuit
2. Tc terminal circuit
DI−230
DI−233
Speed sensor signal check
cannot be done1. Ts terminal circuit
2. ABS ECUDI−235−
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W02196
BF
6
ECU−IG Y
Junction
Connector ABS ECU
W−B Y−B
4
2 3
1
Deceleration
Sensor
A12
ABS ECU
GS1
GS2 GST
A22
3
B−W
Y
B−W
B−W
A22A22 A22
A22
A12
A12
12
10
12 13 14
15
Y−RY−R
Y−B
B
B
B 12 V
12 V
ID3
ID3
ID3
ID2
3
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
DI−219
1996 LAND CRUISER (RM451U)
DTC 44 Deceleration Sensor Circuit
CIRCUIT DESCRIPTION
This sensor detects deceleration on the vehicle. The sensor signal is used in ABS control. If the sensor func-
tions abnormally, the ABS warning light comes on but the ABS still operates.
DTC No.DTC Detecting ConditionTrouble Area
44
Either of the following 1 or 2 is detected:
1. An open or short is detected in circuit GS1 or GS2 for
1sec.
2. After the ignition is turned ON, the test signal is output by GST
During this time, a trouble signal is detected for 0.5 sec.
Deceleration sensor
 Open or short in deceleration sensor circuit
WIRING DIAGRAM
DI5M8−02
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