1996 TOYOTA LAND CRUISER clutch

DI−162
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
1996 LAND CRUISER (RM451U)
2 Check valve body (See page DI−147 ).
NG Repair or replace valve body.
OK
Replace torque converter clutch (See page
AT −26 ).
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Q07464
Solenoid Valve SLTransmission
ECM
B+
R−L
3
EC2
Y 8
E4 SL
R−L
3
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
DI−163
1996 LAND CRUISER (RM451U)
DTC P0773 Shift Solenoid E Electrical Malfunction
(Shift Solenoid Valve SL)
CIRCUIT DESCRIPTION
The shift solenoid valve SL is turned ON and OFF by signals from the ECM to control the hyd\
raulic pressure
acting on the lock−up relay valve, which then controls operation of the lock −up clutch.
Fail Safe Function:
If the ECM detects a malfunction, it turns the shift solenoid valve SL O\
FF.
DTC No.DTC Detecting ConditionTrouble Area
P0773Open or short in shift solenoid valve SL circuit for 1 time
(2 trip detection logic) Open or short in shift solenoid valve SL circuit
 Shift solenoid valve SL
 ECM
WIRING DIAGRAM
DI5KS−02
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Q08584
ECM
Pattern Select Switch*
(PWR Mode Switch)
PWR
E7
P−B
B−W
PWR Indicator Light
(Combination Meter)
ID2
63
C12
13
16
20
15
B
J6
EGU−IG
Fuse Block
Ignition Switch
EA2
AM1
IG1
Fuse Block
AM1
P−B
P−B
6 B
B B ID2
B−W
B−W
3
1
B−Y
2
4
222
1 FL AM1
F6
Battery
2
2
3
4
WB −L
R/B No. 2
R/B No. 2
Pattern Select Switch (PWR Mode Switch)
When the PWR mode switch is pushed in, the switch is contacted and
the PWR mode is celected.
To cancel the PWR mode, push the PWR mode switch onec again.
*:
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
DI−179
1996 LAND CRUISER (RM451U)
Pattern Select Switch Circuit (PWR Mode Switch)
CIRCUIT DESCRIPTION
The ECM memory contains the shift programs for the NORMAL and POWER pattern\
s, 2 position, L position
and the lock −up patterns. Following the programs corresponding to the signals from th\
e pattern select
switch, the park/neutral position switch and other various sensors, the ECM swi\
tches the solenoid valves
ON and OFF, and control the transmission gear change and the lock −up clutch operation.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check operation of PWR indicator light.
PREPARATION:
Check if the PWR indicator light normally when the PWR mode switch is set to NORM and PWR position.
NG Check and repair PWR indicator light.
OK
DI5L6−03
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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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I00247
4
5
DI−300
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
3 Check resistance between terminals L and GND of actuator magnetic clutch.
PREPARATION:
(a) Turn ignition switch OFF.
(b) Disconnect the actuator connector.
CHECK:
Measure resistance between terminals 4 and 5.
OK:
Resistance: 34.65 − 42.35 Ω.
NG Replace cruise control actuator.
OK
4 Check for open and short in harness and connectors between cruise contro\
l ECU and actuator magnetic clutch, actuator magnetic clutch and body grou\
nd
(See page IN−28 ).
NG Repair or replace harness or connector.
OK
Check and replace cruise control ECU
(See page IN−28 ).
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Input SignalIndicator Light
Blinking Pattern
Stop Light
switch ON
Light ON
OFF SW OFF
SW ON
DI−314
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
Stop Light Switch Circuit
CIRCUIT DESCRIPTION
When the brake pedal is depressed, the stop light switch sends a signal to th\
e ECU. When the ECU receives
this signal, it cancels the cruise control.
A fail− safe function is provided so that the cancel functions normally , even if there is a malfunction in the stop
light signal circuit.
The cancel conditions are: Battery positive voltage at terminal STP −
When the brake is on, battery positive voltage normally applies through the S\
TOP fuse and stop light switch
to terminal STP− of the ECU, and the ECU turns the cruise control off.
If the harness connected to terminal STP − has an open circuit, terminal STP − will have battery positive volt-
age and the cruise control will be turned off.
Also, when the brake is on, the magnetic clutch circuit is cut mechanically \
by the stop light switch, turning
the cruise control off (See page DI−298 for operation of the magnetic clutch).
WIRING DIAGRAM
See page DI−298 .
INSPECTION PROCEDURE
1 Check operation of stop light.
CHECK:
Check that stop light comes on when brake pedal is depressed, and turns off when brake pedal is released.
NG Check stop light system (See page BE−24 ).
OK
2 Input signal check.
CHECK:
(a) See input signal check on DI−286.
(b) Check the indicator light when the brake pedal is de-
pressed.
OK:
The indicator light goes off when the brake pedal is
depressed.
OK Proceed to next circuit inspection shown on problem symptoms table (See page DI−295 ).
NG
DI5OI−02
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