1996 TOYOTA LAND CRUISER Position

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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I00490
Cruise Control ECUVR1 VR2
VR3
23
24
25
Y
Y−G Y−L
1
2 3
C4
Cruise Control Actuator
C17
C17 C17
C4
C4
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI−301
1996 LAND CRUISER (RM451U)
DTC 13 Actuator Position Sensor Circuit
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
13Position sensor detects abnormal voltage.
Actuator position sensor
 Harness or connector between cruise control ECU and
actuator position sensor
 Cruise control ECU
WIRING DIAGRAM
DI5OD−02
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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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Input SignalIndicator Light
Blinking Pattern
SET/COAST
switch
RESUME/ACCEL
switch
CANCEL switch2 Pulses
ON
OFF
ON
OFF 3 Pulses
ON
OFF SW OFF
SW ON
AB0119
I00136 I00162
ON
CCS
(+)
(−)
DI−312
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
INSPECTION PROCEDURE
1 Input signal check.
PREPARATION:
See input signal check on page DI−286.
CHECK:
Check the indicator light operation when each of the SET/
COAST, RESUME/ACCEL and CANCEL is turned on.
OK:
SET/COAST, RESUME/ACCEL switch
The signals shown in the table on the left should be
output when each switch is ON. The signal should
disappear when the switch is turned OFF.
CANCEL switch
The indicator light goes off when the cancel switch is
turned ON.
OK Wait and see.
NG
2 Check voltage between terminals CCS of cruise control ECU connector and \
body ground.
PREPARATION:
(a) Remove the ECU with connector still connected.
(b) Turn ignition switch ON.
CHECK:
Measure voltage between terminals CCS of ECU connector
and body ground, when each of the SET/COAST, RESUME/
ACCEL and CANCEL is turned ON.
Switch positionResistance (Ω )
Neutral10 − 14 V
RES/ACC0.7 − 2.5 V
SET/COAST2.3 − 4.6 V
CANCEL4.1 − 7.2 V
NG Proceed to next circuit inspection shown on
problem symptoms table (See page DI−295 )
OK
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N16045
3
4
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI−313
1996 LAND CRUISER (RM451U)
3 Check control switch.
PREPARATION:
(a) Remove steering wheel center pad.
(b) Disconnect the control switch connector.
CHECK:
Measure resistance between terminals 3 and 4 of control switch
connector when control switch is operated.
Switch positionResistance (Ω )
Neutral∞ (No continuity)
RES/ACC50 − 80
SET/COAST180 − 220
CANCEL400 − 440
NG Replace control switch.
OK
4Check harness and connector between cruise control ECU and cruise contro\
l switch,
cruise control switch and body ground (See page
IN−28).
NG Repair or replace harness or connector.
OK
5 Input signal check (See step 1).
OK Wait and see.
NG
Check and replace cruise control ECU
(See page IN−28 ).
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