1996 TOYOTA LAND CRUISER BAT

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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H00094
Airbag Sensor
Assembly
Spiral
Cable
P squib
D squib LOCK
AB0117
N12639
H00026
Airbag Sensor Assembly
LOCK
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
DI−275
1996 LAND CRUISER (RM451U)
INSPECTION PROCEDURE
1 Preparation.
PREPARATION:
(a) Disconnect negative ( −) terminal cable from the battery,
and wait at least 90 seconds.
(b) Remove steering wheel pad. (See SR section)
(c) Disconnect connector of front passenger airbag assem- bly. (See page RS−22 )
CAUTION:
Store the steering wheel pad with the front surface facing
upward.
2 Does SRS warning light turn off?
PREPARATION:
(a) Turn ignition switch to LOCK.
(b) Disconnect negative ( −) terminal cable from the battery,
and wait at least 90 seconds.
(c) Disconnect airbag sensor assembly connector.
(d) Connect negative (−) terminal cable to battery.
CHECK:
Check operation of SRS warning light.
NO Check SRS warning light circuit or terminal AB circuit of DLC1.
YES
Replace airbag sensor assembly.
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AB0119
R14302H00027
Airbag Sensor Assembly
ON
LA
(−)(+)
H00051
Airbag Sensor
Assembly
P Squib
D Squib Spiral
Cable
ON
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
DI−277
1996 LAND CRUISER (RM451U)
3 Check SRS warning light circuit.
PREPARATION:
(a) Connect negative ( −) terminal cable to battery.
(b) Turn ignition switch to ACC or ON.
CHECK:
Measure voltage LA terminal of harness side connector of air-
bag sensor assembly.
OK:
Voltage: 10 − 14 V
NG Check SRS warning light bulb/repair SRS warn-
ing light circuit.
OK
4 Does SRS warning light come on?
PREPARATION:
(a) Disconnect negative ( −) terminal cable from the battery.
(b) Connect airbag sensor assembly connector.
(c) Connect negative ( −) terminal cable to battery, and wait
at least 2 seconds.
(d) Turn ignition switch to ACC or ON.
CHECK:
Check operation of SRS warning light.
NO Check terminal LA of airbag sensor assembly. If normal, replace airbag sensor assembly.
YES
From the results of the above inspection, the malfunctioning part can now be \
considered normal.
To make sure of this, use the simulation method to check.
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AB0117 AB0118 AB0119
R12658H00032
LOCKACCON
or
Airbag Sensor Assembly
Tc
DI−282
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
1996 LAND CRUISER (RM451U)
4 Check airbag sensor assembly.
PREPARATION:
(a) Turn ignition switch to LOCK.
(b) Disconnect negative ( −) terminal cable from the battery,
and wait at least 90 seconds.
(c) Disconnect airbag sensor assembly connector.
(d) Insert service wire into terminal Tc from back side as shown.
(e) Connect airbag sensor assembly connector with service wire.
(f) Connect negative (−) terminal cable to battery.
(g) Turn ignition switch to ACC or ON, and wait at least 20 se-
conds.
(h) Connect service wire of terminal Tc to body ground.
CHECK:
Check operation of SRS warning light.
OK:
SRS waning light comes on.
NOTICE:
Never make a mistake with the terminal connection posi-
tion as this will cause a malfunction.
OK Check harness between airbag sensor assem- bly and DLC1.
NG
Replace airbag sensor assembly.
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AB0117
R14303H00033
LOCK
Airbag Sensor Assembly
Tc
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
DI−283
1996 LAND CRUISER (RM451U)
If the DTC is displayed without a DTC check procedure, perform the followi\
ng
troubleshooting.
1 Check resistance between terminal Tc of airbag sensor assembly and body
ground.
PREPARATION:
(a) Turn ignition switch to LOCK.
(b) Disconnect negative ( −) terminal cable from the battery,
and wait at least 90 seconds.
(c) Disconnect airbag sensor assembly connector.
CHECK:
Check resistance between terminal Tc of airbag sensor assem-
bly connector and body ground.
OK:
Resistance: 1 MΩ or Higher
NG Repair or replace harness or connector.
OK
Replace airbag sensor assembly.
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DI5O9−02
I00410
C18
Vd−26−2−E
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI−293
1996 LAND CRUISER (RM451U)
TERMINALS OF ECM
Symbols (Terminals No.)Wiring ColorConditionSTD Voltage (V)
D ↔ GND (C18 −2 ↔ C18− 13)B−W ↔ BRShift to except D positionBelow 1 V
Shift to D position10 − 16 V
PI ↔ GND (C18 −7 ↔ C18− 13)G−Y ↔ BR
Ignition switch ON
Cruise control main switch ONBelow 1.2 V
Ignition switch ON
Cruise control main switch OFF10 − 16 V
TC ↔ GND
(C18− 8 ↔ C18− 13)B−Y ↔ BR
Ignition switch ON10 − 16 V
Ignition switch ON
Connect terminals TC and E1 of diagnostic check connectorBelow 1 V
OD ↔ GND
(C18− 9 ↔ C18− 13)G−O ↔ BR
During cruise control driving
OD switch ON.10 − 16 V
During cruise control driving
OD switch OFF (3rd driving)Below 1 V
L ↔ GND
(C18− 10 ↔ C18− 13)R ↔ BRDuring cruise control driving9 − 15 V
Except during cruise control drivingBelow 1 V
MC ↔ GND
(C18−11 ↔ C18− 13)L− R ↔ BR
During cruise control driving
COAST switch hold ON9 − 15 V
During cruise control driving
ACC switch hold ONBelow 1 V
MO ↔ GND
(C18− 12 ↔ C18− 13)L ↔ BR
During cruise control driving
ACC switch hold ON9 − 15 V
During cruise control driving
COAST switch hold ONBelow 1 V
GND ↔ Body Ground
(C18− 13 ↔ Body Ground)BR ↔ Body
GroundConstantBelow 1 V
B ↔ GND
(C18− 14 ↔ C18− 13)B−W ↔ BRIgnition switch ON10 − 16 V
BATT ↔ GND
(C18− 15 ↔ C18− 13)B−R ↔ BRConstant10 − 16 V
STP− ↔ GND
(C18− 16 ↔ C18− 13)G−W ↔ BRDepress brake pedal10 − 16 V
Release brake pedalBelow 1 V
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I00489
Cruise Control ECUL
L−
W−B
1
5
4 3
2 R
1026
C4 Stop Light Switch
4
R−G
Cruise
Control Actuator
C17
C17
C17
C4S13
S13 S13
S13
G−O G−WF11F11
1
2
STOP
Instrument Panel Fuse Block
W
EA3
W
3
1
F8
Battery Fusible Link
FL MAIN
STP−
DI−298
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
DTC 12 Actuator Magnetic Clutch Circuit
CIRCUIT DESCRIPTION
This circuit turns on the magnetic clutch inside the actuator during cruise \
control operation according to the
signal from the ECU. If a malfunction occurs in the actuator or speed sensor, etc. during cruise control opera-
tion, the rotor shaft between the motor and control plate is released.
When the brake pedal is depressed, the stop light switch turns on, supplying electrical power to the stop light.
Power supply to the magnetic clutch is mechanically cut and the magnetic clut\
ch is turned OFF.
When driving downhill, if the vehicle speed exceeds the set speed by 15 km/h\
(9 mph), the ECU turns the
safety magnet clutch OFF. If the vehicle speed later drops to within 10 km/h (6 mph) above the\
set speed,
then cruise control at the set speed is resumed.
DTC No.Detection ItemTrouble Area
12 Short in actuator magnetic clutch circuit.
 Open (0.8 sec.) in actuator magnetic clutch circuit.
STOP Fuse
 Stop light switch
 Actuator magnetic clutch
 Harness or connector between cruise control ECU and
actuator magnetic clutch, actuator magnetic clutch and body
ground
 Cruise control ECU
WIRING DIAGRAM
DI5OC−02
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I00054
54
(+)
(−)
DI−304
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
DTC 14 Actuator Mechanical Malfunction
CIRCUIT DESCRIPTION
The circuit detects the rotation position of the actuator control plate and\
sends a signal to the ECU.
DTC No.Detection ItemTrouble Area
14
 Open in actuator motor circuit.
 Position sensor signal valve does not change when the
motor operates.
Actuator lock: (motor, arm)
 Actuator motor
 Harness or connector between cruise control ECU and
actuator motor
 Cruise control ECU
WIRING DIAGRAM
See page DI−296 .
INSPECTION PROCEDURE
1 Check cruise control actuator arm locking operation
PREPARATION:
(a) Turn ignition switch OFF.
(b) Disconnect the actuator connector.
CHECK:
(a) Connect the positive (+) lead from the battery to the termi-
nal 5 of actuator and the negative ( −) lead to terminal 4.
NOTICE:
Do not connect the high tension cables to the wrong bat-
tery terminal. You will damage the cruise control actuator.
(b) Move the control plate by hand.
OK:
Control plate does not move.
NG Replace cruise control actuator.
OK
DI5OE−02
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