1996 TOYOTA LAND CRUISER Speed sensor

DI5O6-02
N06218CRUISE MAIN Indicator Light
BE4034
Indicator Light1.5 sec. 0.5 sec.
ON
OFF
N06219
TC
E1
DLC1
-
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI-286
1996 LAND CRUISER (RM451U)
PRE-CHECK
1. DIAGNOSIS SYSTEM
(a) Check the indicator.
(1) Turn the ignition switch to ON.
(2) Check that the CRUISE MAIN indicator light comeson when the cruise control main switch is turned on,
and that the indicator light goes off when the main
switch is turned OFF.
HINT:
If the indicator check result is not normal, proceed to trouble-
shooting (See page BE-34) for the combination meter section.
(b) Check the DTC.
HINT:
If a malfunction occurs in the No. 1 vehicle speed sensors or ac-
tuator, etc. during cruise control driving, the ECU actuates
AUTO CANCEL of the cruise control and turns on and off the
CRUISE MAIN indicator light to inform the driver of a malfunc-
tion. At the same time, the malfunction is stopped in memory as
a diagnostic trouble code.
(c) Output of DTC using diagnosis check wire. (1) Turn the ignition switch ON.
(2) Using SST, connect terminals Tc and E
1 of DLC1.
SST 09843-18020
(3) Read the DTC on the CRUISE MAIN indicator light.
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N14305
(1)
(1) (2)
No.
Operation Method CRUISE MAIN Indicator Light
Blinking Pattern Diagnosis
1 Turn SET/COAST switch ON
2 Turn RES/ACC switch ON
3 Turn CANCEL switch ON
Turn stop light switch ON
Depress brake pedal
Turn PNP switch OFF
(Shift to except D position)
4 Drive at about 40 km/h
(25 mph)or higher
Drive at about 40 km/h
(25 mph) or below
Light
ON
OFF
Light ON
OFF
Light ON
OFF Switch ON
Switch OFF
LightON
OFF Switch OFF
Switch ONSET/COAST switch circuit
is normal
RES/ACC switch circuit
is normal
CANCEL switch circuit
is normalStop light switch circuit
is normal
PNP switch circuit is
normal
Vehicle Speed Sensor is
normal
Light ON
OFF
Light
ON
OFF
1sec.
0.25 sec. 0.25 sec.
-
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI-290
1996 LAND CRUISER (RM451U)
5. INPUT SIGNAL CHECK
HINT:
(1) For check No.1 - No.3

Turn ignition switch ON.
(2) For check No.4

Jack up the vehicle.

Start the engine.

Shift to D position.
(a) Press the control switch to SET/COAST or RES/ACC position and hold it down or hold it up º1º.
(b) Push the main switch ON º2º.
(c) Check that the CRUISE MAIN indicator light blinks twice or 3 times repeatedly after 3 seconds.
(d) Turn the SET/COAST or RES/ACC switch OFF.
(e) Operate each switch as listed in the table below.
(f) Read the blinking pattern of the CRUISE MAIN indicator light.
(g) After performing the check, turn the main switch OFF.
HINT:
When 2 or more signals are input to the ECU, the lowest num-
bered code will be displayed first.
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DI5O7−02
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI−291
1996 LAND CRUISER (RM451U)
DIAGNOSTIC TROUBLE CODE CHART
If a malfunction code is displayed during the DTC check, check the circuit listed for that cod\
e in the table
below and proceed to the appropriate page.
DTC No.
(See Page)Circuit inspectionTrouble Area
11
( DI−296 )Actuator Motor Circuit
Actuator motor
 Harness or connector between cruise control ECU and
actuator motor
 Cruise control ECU
12
( DI−298 )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
13
( DI−301 )Actuator Position Sensor Circuit
Actuator position sensor
 Harness or connector between cruise control ECU and
actuator position sensor
 Cruise control ECU
14
( DI−304 )Actuator Mechanical Malfunction
Actuator motor (actuator lock: motor, arm)
 Harness or connector between cruise control ECU and
actuator motor
 Cruise control ECU
21
( DI−306 )Open in Vehicle Speed Sensor Circuit
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
23
( DI−310 )Vehicle Speed Signal AbnormalVehicle speed sensor
 Cruise control ECU
32
( DI−311 )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
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DI5O8−02
I00756
DLC1
Cruise Control Actuator
 Actuator Motor
 Actuator Magnetic Clutch
 Actuator Position Sensor
Cruise Control ECU
Cruise Control Switch
 Main Switch
 Control Switch
Stop Light Switch
No.1 V ehicle Speed Sensor
Park/Neutral Position Switch
Instrument Panel Fuse Block

GAUGE Fuse
 ECU−IG Fuse
 ECU− B Fuse
DI−292
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
PARTS LOCATION
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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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