1996 TOYOTA LAND CRUISER Ignition switch

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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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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AB0119I00015 I00024
ON
STP−
(−) (+)
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI−315
1996 LAND CRUISER (RM451U)
3 Check voltage between terminal STP− of cruise control ECU connector and
body ground.
PREPARATION:
(a) Remove the ECU with connectors still connected.
(b) Turn ignition switch ON.
CHECK:
Measure voltage between terminal STP− of cruise control ECU
connector and body ground, when the brake pedal is de-
pressed and released.
OK:
Depressed10 − 14 V
ReleasedBelow 1 V
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI−295 ).
NG
4 Check for open in harness and connectors between terminal STP − of cruise con-
trol ECU and stop light switch (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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AB0119I00053 I00031
ON
IDL
(−) (+)
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI−317
1996 LAND CRUISER (RM451U)
INSPECTION PROCEDURE
1 Check voltage between terminal IDL of cruise control ECU connector and body
ground.
PREPARATION:
(a) Remove the ECU with connector still connected.
(b) Disconnect the ECM and ABS ECU connectors.
(c) Turn ignition switch ON.
CHECK:
Measure voltage between terminal IDL of ECU connector and
body ground when the throttle valve is fully closed and fully
opened.
OK:
Throttle valve positionVoltage
Fully opened10 − 14 V
Fully closedBelow 2 V
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI−295 ).
NG
2 Check harness and connector between ECM and throttle position sensor (See page IN−28 ).
NG Repair or replace harness or connector.
OK
3 Check throttle position sensor circuit (See page DI−35).
NG Replace throttle position sensor.
OK
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AB0119I00012 I00025
ON
OD
(−) (+)
DI−320
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
INSPECTION PROCEDURE
1 Check operation of overdrive.
PREPARATION:
Test drive after engine warms up.
CHECK:
Check that overdrive ON ↔ OFF occurs with operation of OD switch ON−OFF.
NG Check and repair electronically controlledtransmission (See page DI−129 ).
OK
2 Check voltage between terminal OD of harness side connector of cruise co\
ntrol ECU and body ground.
PREPARATION:
(a) Remove the ECU with connector still connected.
(b) Turn ignition switch ON.
(c) Disconnect the ECU connector.
CHECK:
Measure voltage between terminal OD of harness side connec-
tor of ECU and body ground.
OK:
Voltage: 10 − 14 V
NG Go to step 5.
OK
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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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AB0119I00017 I00026
ON
D
(−)
(+)
DI−324
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
3 Check voltage between terminal D of cruise control ECU connector and body
ground.
PREPARATION:
Turn ignition switch ON.
CHECK:
Measure voltage between terminal D of ECU connector and
body ground when shifting into D position and other positions.
OK:
Shift PositionVoltage
D position10 − 14 V
Other positionsBelow 1 V
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI−295 ).
NG
4 Check harness and connector between cruise control ECU and park/neutral position switch (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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I00496
Cruise Control ECU
Fusible Link Fusible Link
Battery BR
BR
Instrument
Panel Fuse Block
ECU−IG
Ignition Switch BB
2
4 3
2
F6
1 JUNCTION
CONNECTOR J6
C17
C17B−W
I12
I12 4
2
2
2
2 B−W
F11
F11
B
B−Y
B
6EA2B
GND
13
14
AM1
FL AM1
1
ID
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI−325
1996 LAND CRUISER (RM451U)
ECU Power Source Circuit
CIRCUIT DESCRIPTION
The ECU power source supplies power to the actuator and sensors, etc.. When\
terminal GND and the cruise
control ECU case are grounded.
WIRING DIAGRAM
DI5OM−02
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