speed sensor TOYOTA LAND CRUISER 1996 J80 Repair Manual

DI5OA−02
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI−295
1996 LAND CRUISER (RM451U)
PROBLEM SYMPTOMS TABLE
SymptomSuspect AreaSee page
SET not occourring or CANCEL occurring.
(DTC is Normal)
1. Main Switch Circuit (Cruise control switch)
2. Vehicle Speed Sensor
3. Control Switch Circuit (Cruise control switch)
4. Stop Light Switch Circuit
5. Park/Neutral Position Switch Circuit
6. Actuator Motor Circuit
7. Cruise Control Cable
8. Cruise Control ECUDI−330
DI−306
DI−311
DI−314
DI−322
DI−296
DI−336 IN−28
SET not occurring or CANCEL occurring.
(DTC does not output)1. ECU Power Source Circuit
2. Cruise Control ECUDI−325IN−28
Actual vehicle speed deviates above or below the set speed.
1. Cruise Control Cable
2. Vehicle Speed Signal Abnormal
3. Electronically Controlled Transmission Communication
Circuit
4. Actuator Motor Circuit
5. Idle Signal Circuit (main throttle position sensor)
6. Cruise Control ECUDI−336
DI−310
DI−319
DI−296
DI−316IN−28
Gear shifting frequent between 3rd O/D when driving on uphill
road. (Hurting)1. Electronically Controlled Transmission Communication
Circuit
2. Cruise Control ECUDI−319
IN−28
Cruise control not cancelled, even when brake pedal is de-
pressed.
1. Cruise Control Cable
2. Stop Light Switch Circuit
3. Actuator Motor Circuit
4. Cruise Control ECUDI−336
DI−314
DI−296IN−28
Cruise control not cancelled, even when transmission is shifted to
”N” postion.
1. Cruise Control Cable
2. Park/Neutral Position Switch Circuit
3. Actuator Motor Circuit
4. Cruise Control ECUDI−336
DI−322
DI−296IN−28
Control switch does not operate.
(SET/COAST, A CC/RES, CANCEL not possible)
1. Cruise Control Cable
2. Control Switch Circuit
3. Actuator Motor Circuit
4. Cruise Control ECUDI−336
DI−311
DI−296 IN−28
SET possible at 40 km/h (25 mph) or less, or CANCEL does not
operate at 40 km/h (25 mph) or less.
1. Cruise Control Cable
2. Vehicle Speed Signal Abnormal
3. Actuator Motor Circuit
4. Cruise Control ECUDI−336
DI−310
DI−296IN−28
Poor response is ACCEL and RESUME modes.
1. Cruise Control Cable
2. Electronically Controlled Transmission Communication
Circuit
3. Actuator Motor Circuit
4. Cruise Control ECUDI−336
DI−319
DI−296IN−28
O/D does not RESUME, even though the road is not uphill.
1. Electronically Controlled Transmission Communication
Circuit
2. Cruise Control ECUDI−319
IN−28
DTC memory is erased.1. Back− up Power Source Circuit
2. Cruise Control ECUDI−328 IN−28
DTC is not output, or is output when is should not be.1. Diagnosis Circuit
2. Cruise Control ECUDI−319IN−28
Cruise MAIN indicator light remains ON or fall to light up.1. Cruise MAIN Indicator Light Switch CircuitDI−332
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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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I00414ECTOD/TRIP METER
Cruise Control ECU
4 pulse/
1 rotation
of rotor shaft 4 pulse/
1 rotation
of rotor shaft
Vehicle Speed Sensor
DI−306
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
DTC 21 Open in Vehicle Speed Sensor Circuit
CIRCUIT DESCRIPTION
The vehicle speed sensor circuit is sent to cruise control ECU as vehicle s\
peed signal.
The rotor shaft is driven by the gear of the transmission.
For each rotation of the shaft, the vehicle speed sensor sends a 4 pulse si\
gnal through the combination me-
ter to the cruise control ECU (See the following).
This signal is converted inside the combination meter and sent as a 4 −pulse signal to the cruise control ECU.
The ECU calculates the vehicle speed from this pulse frequency.
DTC No.Detection ItemTrouble Area
21 Speed signal is not input to the cruise control ECU while
cruise control is set.
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
DI5OF−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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Input SignalIndicator Light
Blinking Pattern
Drive at about
40 km/h (25 mph)
or below
Drive at about
40 km/h (25 mph)
or higher Light
ON
OFF
Light ON
OFF
DI−308
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
INSPECTION PROCEDURE
1 Input signal check.
CHECK:
(a) See input signal check on page DI−286.
(b) Check indicator light operation when driving with vehicle speed above 40 km/h (25 mph), and with vehicle speed
below 40 km/h (25 mph).
OK:
Vehicle speed above 40 km/h (25 mph):
Indicator light blinks
Vehicle speed below 40 km/h (25 mph):
Indicator light stays on
OK Check and replace cruise control ECU (See page IN−28 ).
NG
2 Check speedometer circuit (See Combination meter troubleshooting on pag\
e BE−34 ).
NG Repair or replace harness, connector or com-
bination meter assembly.
OK
3 Check harness and connector between cruise control ECU and combination m\
e- ter, combination meter and vehicle speed sensor (See page IN−28 ).
NG Repair or replace harness or connector.
OK
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−
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI−309
1996 LAND CRUISER (RM451U)
4 Check vehicle speed sensor (See page BE−34).
NG Replace vehicle speed sensor.
OK
Check and replace cruise control ECU
(See page IN−28 ).
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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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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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SA−2
−
SUSPENSION AND AXLE TROUBLESHOOTING
859
Author: Date:
1996 LAND CRUISER (RM451U)
Oil leak from rear dif
ferential
1. Oil level: too high or wrong grade
2. Oil seal: worn or damaged
3. Companion flange: loosen or damagedSA−73
SA−73
SA−87
Indicator lights do not light up
1. Fusible link: blown
2. GAUGE fuse: blown
3. Bulb: burned out
4. Wiring or ground: faultyBE−9
BE−9
BE−32 −
Indicator lights do not light up
(Diff. lock control switch RR or FR RR position)
1. DIFF fuse: blown
2. Diff. lock control switch: faulty
3. Diff. lock ECU: faulty
4. Wiring or ground: faultyBE−9
SA−101
SA−101 −
Differential lock does not operate
1. Diff. lock position switch: faulty
2. Diff. lock actuator: faulty
3. Diff. lock ECU: faulty
4. Differential carrier (Diff. lock): faulty
5. Wiring or ground: faultySA−101
SA−101
SA−101
SA−101−
After differential lock, lock not release
When vehicle speed is higher than approx. 8 km/h (5mph)1. Speed sensor: faulty
2. Diff. lock ECU: faulty
3. Wiring or ground: faultyBE−32
SA−101 −
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SA1UG−01
W00495
SA2644
SST
R08383
R13137
−
SUSPENSION AND AXLE STEERING KNUCKLE AND AXLE SHAFT
SA−13
1996 LAND CRUISER (RM451U)
REMOVAL
1. REMOVE FRONT AXLE HUB (See page SA−7 )
2. REMOVE ABS SPEED SENSOR
Remove the 2 bolts and disconnect the speed sensor from the
steering knuckle.
3. REMOVE DUST SEAL AND DUST COVER
Remove the 8 bolts, dust seal, dust cover and gasket.
4. REMOVE KNUCKLE SPINDLE
(a) Using a brass bar and hammer, tap the knuckle spindle of the steering knuckle.
(b) Remove the knuckle spindle and gasket.
5. REMOVE AXLE SHAFT
Position one flat part of the outer shaft upward and remove the
axle shaft.
6. DISCONNECT TIE ROD FROM KNUCKLE ARM
(a) Remove the cotter pin and nut.
(b) Using SST, disconnect the tie rod from the knuckle arm. SST 09611 −22012
7. REMOVE OIL SEAL SET
(a) Remove the 6 bolts from the end retainer.
(b) Remove these parts from the steering knuckle:
Oil seal end retainer
Felt dust seal
Rubber seal
Steel ring
8. REMOVE KNUCKLE ARM AND BEARING CAP
(a) Remove the 2 bolts and plate washers from the bearing cap.
(b) Remove the 4 nuts from the knuckle arm.
(c) Using a brass bar and hammer, tap on the 4 bolts heads and remove the 4 cone washers.
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