1996 TOYOTA LAND CRUISER diagram

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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I00491
Cruise Control ECU
C17
Speedometer
(Combination Meter)
C13
C13
4 3
Vehicle Speed Sensor (Combination Meter) R−O
R−O
R−G
R−G 25
1
Ea1EC1
IH1L−W
BR Air Intake Chamber
EC
V1
V1
V13 2
1
1
Ea1 EC1
3 6
Y
Y GAUGE
AM1
Y
Y
BR
BR
EC1
Ea1 IH1
22
Instrument Panel Fuse
Block
Fusible Link BatteryWB
B
I12
I12
Ignition Switch 2
4
1
3
F11
F11Y
B
B
J4
JUNCTION
CONNECTOR
EA1
6
2
2 3
4
B−L
FL MAIN
F6
1 B−Y
39
20
SPD
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI−307
1996 LAND CRUISER (RM451U)
WIRING DIAGRAM
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DI−310
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
DTC 23 Vehicle Speed Signal Abnormal
CIRCUIT DESCRIPTION
See page DI−306 .
DTC No.Detection ItemTrouble Area
23
Vehicle speed sensor pulse is abnormal. (When speed signal
is not input to the ECU below 0.2 sec., code will be dis-
played.)Vehicle speed sensor
 Cruise control ECU
WIRING DIAGRAM
See page DI−306 .
INSPECTION PROCEDURE
1 Check vehicle speed sensor (See page BE−34).
NG Replace vehicle speed sensor.
OK
Check and replace cruise control ECU (See
page IN−28 ).
DI5OG−02
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I00492
Cruise Control ECU
Cruise Control Switch
MAIN
CANCEL
SET/COAST RESUME/
ACCEL
C17
C15
C17
C17
C15
C15 20 5
15
Y−R
B−G
BR BR BR
ID CCS
GND
CMS
19
1817
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI−311
1996 LAND CRUISER (RM451U)
DTC 32 Control Switch Circuit
(Cruise Control Switch)
CIRCUIT DESCRIPTION
This circuit carries the SET/COAST, RESUME/ACCEL and CANCEL signals (each voltage) to the ECU.
DTC No.Detection ItemTrouble Area
32Short in 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
WIRING DIAGRAM
DI5OH−02
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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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I00493
Cruise Control ECUIDL
C17 21
G−W
ECM
IDL IH1
E5 19
G−W
11
Threottle Position Sensor G−W
DI−316
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
Idle Switch Circuit
CIRCUIT DESCRIPTION
When the idle switch in turned ON, a signal is sent to the ECU. The ECU uses\
this signal to correct the dis-
crepancy between the throttle valve position and the actuator position sensor val\
ue to enable accurate
cruise control at the set speed. If the idle switch is malfunctioning, problem\
symptoms also occur in the en-
gine, so also inspect the engine.
WIRING DIAGRAM
DI5OJ−02
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I00494
Cruise Control ECUECT
22 9
15
9
E4S2
R−Y
ECM
E7
OD1
ODC17
18
G−R
G−O
C17
R−Y
R−Y
2 EC2 IH2
Ellectronically Con trolled
Transmission Solenoid
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI−319
1996 LAND CRUISER (RM451U)
Electronically Controlled Transmission Communication Circuit
CIRCUIT DESCRIPTION
When driving uphill under cruise control, in order to reduce shifting due to ON− OFF overdrive operation and
to provide smooth driving, when down shifting in the electronically controlled transmission occurs, a si\
gnal
to prevent upshift until the end of the up hill slope is sent from the cru\
ise control ECU to the electronically
controlled transmission.
Terminal ECT of the cruise control ECU detects the shift change signal (\
output to electronically controlled
transmission No. 2 solenoid) from the ECM.
If vehicle speed down, also when terminal ECT of the cruise control ECU receives down shifting signal, it
sends a signal from terminal OD to ECM to cut overdrive until the end of the uph\
ill slope, and the gear shifts
are reduced and gear shift points in the electronically controlled transmis\
sion are changed.
WIRING DIAGRAM
DI5OK−02
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I00495
Cruise Control ECUD
2
Y Y
B
B 4
Instrument Panel Fuse Block B−O
IH1
1 3
6
B−O
GAUGE
9
2 4
Ignition Switch C17
B−Y FL AM1 AM1
EA2 2
1
B
B 6
Battery 2
1 W
2 2
B−L
A/T Indicator Light
(Park/Neutral Position Switch)
IH24
P1
P1
F11 F11 J4
JUNCTION
CONNECTOR
I12 I12 Fusible Link
F6 2
D
Fusible Link
Y
DI−322
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
Park/Neutral Position Switch Circuit
CIRCUIT DESCRIPTION
When the shift position is put in except D position, a signal is sent from t\
he park/neutral position switch to
the ECU. When this signal is input during cruise control driving, the EC\
U cancels the cruise control.
WIRING DIAGRAM
DI5OL−02
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Version 1.11 - 03/16/2010