1996 TOYOTA LAND CRUISER Ignition switch

DI−294
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
Symbols (Terminals No.)
Wiring ColorConditionSTD Voltage (V)
CCS ↔
GND
(C18− 18 ↔ C18− 13)B−G ↔ BR
Ignition switch ON10 − 16 V
Ignition switch ON
CANCEL switch hold ON5.1 − 8.3 V
Ignition switch ON
SET/COAST switch hold ON2.4 − 4.0 V
Ignition switch ON
RES/ACC switch hold ON0.8 − 1.4 V
CMS ↔ GND
(C18− 19 ↔ C18− 13)Y−R ↔ BR
Ignition switch ON
Main switch ONBelow 1 V
Ignition switch ON
Main switch OFF10 − 16 V
SPD ↔ GND
(C18− 20 ↔ C18− 13)L− W ↔ BRIgnition switch ON4.7 − 5.2 V
During driving3 − 7 V
IDL ↔ GND
(C18− 21 ↔ C18− 13)G−W ↔ BR
Ignition switch ON
Throttle valve fully closedBelow 1 V
Ignition switch ON
Throttle valve fully opened10 − 16 V
ECT ↔ GND
(C18− 22 ↔ C18− 13)
ECT ↔ GND
(C18− 22 ↔ C18− 13)
G−R ↔ BR
During driving
Gear position O/DBelow 1 V
During driving
Gear position 3rd10 − 16 V
VR1 ↔ GND
(C18− 23 ↔ C18− 13)Y ↔ BRIgnition switch ON4.7 − 5.2 V
VR2 ↔ VR3
(C18− 24 ↔ C18− 25)Y−G ↔ Y−L
During cruise control driving1.0 − 4.7 V
Ignition switch ON
Actuator control plate fully opened4.2 − 4.7 V
Ignition switch ON
Actuator control plate fully closed1.0 − 1.2 V
VR3 ↔ GND
(C18− 25 ↔ C18− 13)Y−L ↔ BRConstantBelow 1 V
L− ↔ GND
(C18− 26 ↔ C18− 13) ↔ BRConstantBelow 1 V
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I00248
76
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI−297
1996 LAND CRUISER (RM451U)
INSPECTION PROCEDURE
1 Check resistance between terminals MO and MC of actuator motor.
PREPARATION:
(a) Turn ignition switch OFF.
(b) Disconnect the actuator connector.
CHECK:
Measure resistance between terminals 6 and 7.
HINT:
If control plate position is fully opened or fully closed, resistance
can not measure.
OK:
Resistance: more than 4.2 Ω
NG Replace cruise control actuator.
OK
2 Check for open and short in harness and connectors between cruise contro\
l ECU and actuator motor (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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N18670
Instrument Panel Fuse Block
STOP Fuse
I00133
1
2
43
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI−299
1996 LAND CRUISER (RM451U)
INSPECTION PROCEDURE
1 Check STOP fuse.
PREPARATION:
(a) Turn ignition switch OFF.
(b) Remove the STOP fuse from instrument panel fuse block.
CHECK:
Check fuse continuity.
OK:
There is continuity.
NG Replace STOP fuse.
OK
2 Check stop light switch.
PREPARATION:
Disconnect the stop light switch connector.
CHECK:
Check continuity between terminals.
Switch positionContinuity
Switch pin free
(Brake pedal depressed)1 − 2
Switch pin pushed in
(Brake pedal released)3 − 4
NG Replace stop light switch.
OK
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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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AB0119
I00135I00130
I00161VR2
VR3
ON
Fully Close Side
Fully Open Side
Control Plate
(−)
(+)
I00006
1
3
DI−302
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
INSPECTION PROCEDURE
1 Check resistance between terminals VR2 and VR3 of cruise control ECU connec-
tor.
PREPARATION:
(a) Remove the ECU with connectors still connected.
(b) Turn ignition switch OFF.
CHECK:
Measure voltage between terminals VR2 and VR3 of ECU con-
nector while turning control plate slowly by hand from the decel-
eration side to the acceleration side.
OK:
Voltage:
Fully closed: Approx. 1.3 V
Fully opened: Approx. 4.1 V
In addition, as the control plate is turned, the voltage
should increase gradually without interruption.
NG Proceed to next circuit inspection shown on problem symptoms table (See page DI−295 ).
OK
2 Check resistance between terminals VR1 and VR3 of actuator position sens\
or.
PREPARATION:
(a) Turn ignition switch OFF.
(b) Disconnect the actuator connector.
CHECK:
Measure resistance between actuator terminal 1 and 3 of ac-
tuator connector.
OK:
Resistance: 1.8 − 2.2 kΩ (25 °C)
NG Replace cruise control actuator.
OK
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I00007
23
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI−303
1996 LAND CRUISER (RM451U)
3 Check voltage between terminals VR2 and VR3 of actuator position sensor.
PREPARATION:
(a) Turn ignition switch ON.
(b) Connect the actuator connector.
CHECK:
Measure voltage between terminals 2 and 3 of actuator con-
nector while turning control plate slowly by hand from the decel-
eration side to the acceleration side.
OK:
Voltage: 1.3 − 4.0 V
HINT:
As the control plate is turned, the voltage should increase grad-
ually without interruption.
NG Replace cruise control actuator.
OK
4 Check for open and short in harness and connector between cruise control\
ECU and actuator position sensor (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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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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I00131
I00132I00008
I00010
I00132
Fully open side
Control plate Fully close side
Control Plate 4
5
674
6
5
7
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI−305
1996 LAND CRUISER (RM451U)
2 Check cruise control actuator operation.
PREPARATION:
(a) Turn ignition switch OFF.
(b) Disconnect the actuator connector.
CHECK:
Connect the positive (+) lead from the battery to terminals 5 and
6 of actuator, connect the negative (−) lead to terminals 4 and
7 of actuator.
OK:
Control arm moves to full open side
CHECK:
Connect the positive (+) lead from the battery to terminals 4 and
7of actuator, connect the negative ( −) lead to terminals 5 and
6 of actuator.
OK:
Control arm moves to full colse side
NG Replace cruise control actuator.
OK
3 Check harness and connector between cruise control ECU and cruise contro\
l ac- tuator (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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