1996 TOYOTA LAND CRUISER lock

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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AB0117 AB0118 AB0119H00258
LOCKACCON
or
AB0118
R14305 AB0119
H00030
ACCON
or E1Tc
(+)
(−)
DLC1
DI−280
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
1996 LAND CRUISER (RM451U)
INSPECTION PROCEDURE
If the DTC is not displayed, perform the following troubleshooting.
1 Does SRS warning light light up for approx. 6 seconds?
PREPARATION:
Check operation of SRS warning light after ignition switch is
turned from LOCK position to ACC or ON position.
NO Check SRS warning light system. (See page DI−240 )
YES
2 Check voltage between terminals Tc and E1 of DLC1.
PREPARATION:
Turn ignition switch to ACC or ON.
CHECK:
Measure voltage between terminals Tc and E1 of DLC1.
OK:
Voltage: 10 − 14 V
OK Go to step 4.
NG
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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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BE4032
BE4033I00021
Normal Code
0.25 sec.
0.25 sec.
ON
OFF
ON
OFF
4 sec. 1.5 sec.
0.5 sec.
2.5 sec.0.5 sec.1.5 sec.
Malfunction codes 11 and 21
Code 11 Code 21
N09348
TOYOTA hand-held tester
TOYOTA Break-out-box
N18670
Instrument Panel Junction Block ECU- B
Fuse
DI-287
-
DIAGNOSTICS CRUISE CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
HINT:
If the DTC is not output, inspect the diagnosis circuit (See page
DI-333 )
As an example, the blinking patterns for codes; normal, 11 and
21 are shown in the illustration.
2. ECU TERMINAL VALUES MEASUREMENT BY USING TOYOTA BREAK-OUT-BOX AND TOYOTA HAND-
HELD TESTER
(a) Hook up the TOYOTA break- out- box and TOYOTA hand-held tester to the vehicle.
(b) Read the ECU input/output values by following the prompts on the tester screen.
(c) Please refer to the TOYOTA hand-held tester has a ºSnapshotº function. This records the measured data and
is effective in the diagnosis of intermittent problems.
3. DTC CLEARANCE
(a) After completing repairs, the diagnostic trouble code re- tained in memory can be cleared by removing the ECU-B
fuse for 10 seconds or more, with the ignition switch off.
(b) Check that the normal code is displayed after connecting the fuse.
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DI5O7−02
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI−291
1996 LAND CRUISER (RM451U)
DIAGNOSTIC TROUBLE CODE CHART
If a malfunction code is displayed during the DTC check, check the circuit listed for that cod\
e in the table
below and proceed to the appropriate page.
DTC No.
(See Page)Circuit inspectionTrouble Area
11
( DI−296 )Actuator Motor Circuit
Actuator motor
 Harness or connector between cruise control ECU and
actuator motor
 Cruise control ECU
12
( DI−298 )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
13
( DI−301 )Actuator Position Sensor Circuit
Actuator position sensor
 Harness or connector between cruise control ECU and
actuator position sensor
 Cruise control ECU
14
( DI−304 )Actuator Mechanical Malfunction
Actuator motor (actuator lock: motor, arm)
 Harness or connector between cruise control ECU and
actuator motor
 Cruise control ECU
21
( DI−306 )Open in Vehicle Speed Sensor Circuit
Combination meter
 Harness or connector between cruise control ECU and com-
bination meter, combination meter and vehicle speed sensor
 Vehicle speed sensor
 Cruise control ECU
23
( DI−310 )Vehicle Speed Signal AbnormalVehicle speed sensor
 Cruise control ECU
32
( DI−311 )Control Switch Circuit
Cruise control switch
 Harness or connector between cruise control ECU and cruise
control switch, cruise control switch and body ground
 Cruise control ECU
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DI5O8−02
I00756
DLC1
Cruise Control Actuator
 Actuator Motor
 Actuator Magnetic Clutch
 Actuator Position Sensor
Cruise Control ECU
Cruise Control Switch
 Main Switch
 Control Switch
Stop Light Switch
No.1 V ehicle Speed Sensor
Park/Neutral Position Switch
Instrument Panel Fuse Block

GAUGE Fuse
 ECU−IG Fuse
 ECU− B Fuse
DI−292
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
PARTS LOCATION
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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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