1996 TOYOTA LAND CRUISER Drive

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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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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W04200
Normal Signal WaveformGND
2 ms/Division
1V/Division
DI-213
-
DIAGNOSTICS ANTI-LOCK BRAKE SYSTEM
1996 LAND CRUISER (RM451U)
2 Check for open and short in harness and connector between each speed sensor and ECU (See page IN-27).
NG Repair or replace harness or connector.
OK
3 Check speed sensor and rotor serrations.
Reference: INSPECTION USING OSCILLOSCOPE
PREPARATION:
(a) Remove the ABS ECU with connector still connected.
(b) Connect the oscilloscope to the terminals FR+, FL+, RR+ or RL+ and GND of the ABS ECU.
CHECK:
Drive the vehicle at 30 km/h (19 mph), and check the signal wa-
veform.
OK Turn the IG swithch OFF, check and replace ABS ECU.
NG
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DI5Q5−02
W02056
1
2
3
4
567
8910 A
B
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
DI−245
1996 LAND CRUISER (RM451U)
TERMINALS OF ECM
No.SymbolTerminal Name
A−Electrical Connection Check Mechanism
B−Electrical Connection Check Mechanism
1P−Squib  (Passenger)
2P+Squib  (Passenger)
3D−Squib  (Driver)
4D+Squib  (Driver)
5E1Ground
6E2Ground
7TcDiagnosis
8LASRS Warning Light
9IG2Power Source (IGN Fuse)
10ACCPower Source (CIG Fuse)
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R14285 AB0119H00021
Airbag Sensor Assembly
ON
IG2
ACC
(+)
(−)
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
DI−265
1996 LAND CRUISER (RM451U)
DTC 31 Airbag Sensor Assembly Malfunction
CIRCUIT DESCRIPTION
The airbag sensor assembly consists of a airbag sensor, safing sensor, drive circuit, diagnosis circuit and
ignition control, etc.
It receives signals from the airbag sensors, judges whether or not the SRS must be activated, and diagnosis
system malfunction.
DTC 31 is recorded when occurrence of a malfunction in the airbag sensor\
assembly is detected.
DTC No.DTC Detection ConditionTrouble Area
31 Airbag sensor assembly malfunctionAirbag sensor assembly
INSPECTION PROCEDURE
HINT:
When a malfunction code other than code 31 is displayed at the same time, fi\
rst repair the malfunction indi-
cated by the malfunction code other than code 31.
1 Preparation (See step 1 on page DI−271).
2 Check voltage at IG2 and ACC of airbag sensor assembly.
PREPARATION:
Turn ignition switch ON.
CHECK:
Measure voltage between terminals IG2 and ACC of airbag
sensor assembly and body ground.
OK:
Voltage: Below 16 V
NG Check battery and charging system (See page CH−2).
OK
DI5QA−03
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R13679
BatteryFL BLOCK 2
MAIN
W
W
ECU−B
1
F/B
S7
B−R
2
3
SRS Warning
Light
8LA
Tc
B−Y8
IH1 Airbag Sensor
Assembly
DLC1
5 W−L
11
GENERATOR
(ALTERNATOR)
W
Cruise Control ECU
W−L
W−L
B−Y
B−Y
IH1 S7 S6
S6
Short Connector
Short Connector W−L
B−L
11
12
3
EA3 11
22
7
DI−274
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
1996 LAND CRUISER (RM451U)
SRS Warning Light System Malfunction (Always lit up, when igni-
tion switch is in LOCK position.)
CIRCUIT DESCRIPTION
The SRS warning light is located on the combination meter.
When the SRS is normal, the SRS warning light lights up for approx. 6 seconds after the \
ignition switch is
turned from LOCK position to ACC or ON position, and then turns off automatically.
If there is a malfunction in the SRS, the SRS warning light lights up to\
inform the driver of the abnormality.
When terminals Tc and E1 of the DLC1 are connected, the DTC is displayed by the blinking\
of the SRS warn-
ing light.
WIRING DIAGRAM
DI5QD−03
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N14677
Fuse
DI−276
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
1996 LAND CRUISER (RM451U)
SRS Warning Light System Malfunction (Does not light up, when
ignition switch is turned to ACC or ON.)
CIRCUIT DESCRIPTION
The SRS warning light is located on the combination meter.
When the SRS is normal, the SRS warning light lights up for approx. 6 seconds after the \
ignition switch is
turned from LOCK position to ACC or ON position, and then turns off automatically.
If there is a malfunction in the SRS, the SRS warning light lights up to\
inform the driver of the abnormality.
When terminals Tc and E1 of the DLC1 are connected, the DTC is displayed by the blinking\
of the SRS warn-
ing light.
WIRING DIAGRAM
Refer to page DI−274 for the WIRING DIAGRAM.
INSPECTION PROCEDURE
1 Check ECU−B Fuse.
PREPARATION:
Remove ECU−B fuse.
CHECK:
Check continuity of ECU −B fuse.
OK:
Continuity
HINT:
Fuse may be burnt out even if it appears to be OK during
visual inspection.
If fuse is OK, install it.
NG Go to step 5.
OK
2 Preparation. (See step 1 on page DI−271)
DI5QE−03
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DI5O5−01
CRUISE CONTROL SYSTEM Check SheetInspector ’s name:
Customer ’s Name
Date of VehicleRegistration No.
Registration Year
Frame No.
Odometer Reading
/ / km
Mile
Condition of
Problem Occurrence
Date of Problem
How Often does
Occurrence
Problem Occur?
Vehicle Speed when
Problem Occurred / /
Continuous Intermittent ( Times a day)
km
Mile
Brought in
Auto cancel
occurs Driving condition  City driving  Freeway  Up hill  Down hill
 After cancel occurred, did the driver activate cruise control again?
 Yes  No
 Cancel does not
occur 
With brake ON
 Except D position shift  At 40 km/h (25 mph) or less
 When control SW turns to CANCEL position
 Cruise control
malfunction 
Slip to acceleration side
 Slip to deceleration side
 Hunting occurs
 O/D cut off does not occur
 O/D does not return
 Switch
malfunction 
SET  ACCEL  COAST  RESUME  CANCEL
 Remains ON  Does not light up  Blinking
Symptoms
DTC Check
1st Time2nd Time

Normal Code  Malfunction Code (Code )
 Normal Code  Malfunction Code (Code )

Cruise MAIN
indicator light
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI−285
1996 LAND CRUISER (RM451U)
CUSTOMER PROBLEM ANALYSIS CHECK
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