1998 TOYOTA LAND CRUISER sensor

D12760
NT+
NT-WL
E635 E627
1
2 T17 Turbine Speed Sensor
WL
EB2
EB25 10ECM
- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-419
612 Author
: Date
:
2004 LAND CRUISER (RM1071U)
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever the follow-
ing DTCs are not present.See page DI-361
Shift changeShift change is completed and before starting next shift change operation
Transmission Shift position4th or 5th
Output shaft rpm1,000 rpm or more-
NSW switchOFF
R switchOFF
L switchOFF
EngineRunning
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
Sensor signal rpmLess than 300 rpm
COMPONENT OPERATING RANGE
ParameterStandard value
Speed sensor (NT)Input speed is equal to engine speed when lock-up ON.
WIRING DIAGRAM

D12741
Magnet1 2
DI-420
- DIAGNOSTICSAUTOMATIC TRANSMISSION
613 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
1 Check speed sensor NT.
PREPARATION:
Remove the speed sensor NT.
CHECK:
(a) Measure the resistance between the sensor terminals.
Standard: 560 to 680 W at 20°C (68°F)
(b) Measure the voltage between the sensor terminals when
a magnet is put close to the front end of the sensor then
moved away quickly.
Standard: Sensor generates voltage intermittently
HINT:
The generated voltage is extremely low.
OK:
Standard
NG Replace speed sensor NT.
OK
2 Check harness and connector between ECM and speed sensor NT (See page
IN-36).
NG Repair or replace harness and connector.
OK
Check and replace the ECM (See page
IN-36).

D11986
D13175Speed Sensor SP2
Parking Gear (Timing Rotor)
- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-421
614 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC P0722 Output Speed Sensor Circuit No Signal
CIRCUIT DESCRIPTION
The speed sensor SP2 detects the rotation speed of the trans-
mission output shaft and sends signals to the ECM. The ECM
determines the vehicle speed based on these signals. An AC
voltage is generated in the speed sensor SP2 coil as the park-
ing gear mounted on the rear planetary gear assy rotates, and
this voltage is sent to the ECM. The parking gear on the rear
planetary gear is used as the timing rotor for this sensor.
The gear shift point and lock-up timing are controlled by the
ECM based on the signals from this vehicle speed sensor and
the throttle position sensor signal. If the speed sensor SP2 mal-
functions, the ECM uses input signals from the speed sensor
NT as a back-up signal.
DTC No.DTC Detection ConditionTrouble Area
P0722
All conditions below are detected 500 times or more continu-
ously (1-trip detection logic)
(a) No signal from speed sensor SP2 is input to ECM while 4
pulses of No. 1 vehicle speed sensor signal are sent
(b) Vehicle speed is 9 km/h (6 mph) or more for at least 4 sec.
(c) Park/neutral position switch is OFF.
(d) Transfer position is except neutral (4WD).

Open or short in speed sensor SP2 circuit

Speed sensor SP2

ECM
MONITOR DESCRIPTION
The output speed sensor monitors the output shaft speed. The ECM controls the gearshift point and the lock
up timing based on the signals from the output speed sensor and throttle position sensor.
If the ECM detects no signal from the output shaft speed sensor even while the vehicle is moving, it will con-
clude that is a malfunction of the output speed sensor. The ECM will illuminate the MIL and store the DTC.
MONITOR STRATEGY
Related DTCsP0722Speed sensor SP2/Verify pulse input
Required sensors/ComponentsSpeed sensor SP2
Frequency of operationContinuous
Duration500 output shaft revolution
MIL operationImmediate
Sequence of operationNone
DIB36-02

D12761
2 1 V3 Vehicle Speed Sensor
(Electronically Controlled Transmission)
R
GSP2+
SP2-
34 E626ECM
E6 DI-422
- DIAGNOSTICSAUTOMATIC TRANSMISSION
615 Author
: Date
:
2004 LAND CRUISER (RM1071U)
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever the follow-
ing DTCs are not present.See page DI-361
Vehicle speed range (4 sec. or more)9 km/h (6 mph) or more-
NSW switchOFF
Transfer neutral switchOFF
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
No pulse input during 4 vehicle speed sensor pulse input500 times or more
WIRING DIAGRAM

D12741
Magnet1 2
- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-423
616 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
1 Check speed sensor SP2.
PREPARATION:
Remove the speed sensor SP2.
CHECK:
(a) Measure the resistance between the sensor terminals.
Standard: 560 to 680 W at 20°C (68°F)
(b) Measure the voltage between the sensor terminals when
a magnet is put close to the front end of the sensor then
moved away quickly.
Standard: Sensor generates voltage intermittently.
HINT:
The generated voltage is extremely low.
OK:
Standard
NG Replace speed sensor SP2.
OK
2 Check harness and connector between ECM and speed sensor SP2 (See page
IN-36).
NG Repair or replace harness and connector.
OK
Check and replace the ECM (See page
IN-36).

DI-424
- DIAGNOSTICSAUTOMATIC TRANSMISSION
617 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC P0724 Brake Switch ºBº Circuit High
CIRCUIT DESCRIPTION
The purpose of this circuit is to prevent the engine from stalling, while driving in lock-up condition, when
brakes are suddenly applied.
When the brake pedal is operated, this switch sends a signal to ECM. Then the ECM cancels operation of
the lock-up clutch while braking is in progress.
DTC No.DTC Detection ConditionTrouble Area
P0724Stop light switch always turn on even vehicle is driver Go and
Stop 10 times. (2-trip detection logic)
Short in stop light switch signal circuit

Stop light switch

ECM
MONITOR DESCRIPTION
When the stop light switch remains ON during ºstop and goº driving, the ECM interprets this as a fault in the
stop light switch and the MIL comes on and the ECM stores the DTC. The vehicle must stop and go (3 km/h
(2 mph) to 30 km/h (19 mph)) ten times for two driving cycles in order to detect malfunction.
MONITOR STRATEGY
Related DTCsP0724Stop light switch/Range check/Rationality
Rid /C tMainStop light switchRequired sensors/ComponentsSubVehicle speed sensor
Frequency of operationContinuous
DurationGO and STOP 10 times
MIL operation2 driving cycles
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever the follow-
ing DTCs are not present.See page DI-361
The stop light switch remains on during GO and STOP 10 times.
GO and STOP are defined as follows;
GO: Vehicle speed30 km/h (19 mph) or more-
STOP: Vehicle speed-Less than 3 km/h (2 mph)
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
Brake switch statusON stuck
WIRING DIAGRAM
See page DI-278.
DIB37-02

- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-429
622 Author
: Date
:
2004 LAND CRUISER (RM1071U)DTC No.
DTC Detection ConditionTrouble Area
P0748
ECM checks for an open or short circuit in shift solenoid valves
SL1 (1-trip detection logic)
(a) When solenoid, duty ratio equal to 100%
(b) When solenoid is not energized, duty ratio is less than 3%Open or short in shift solenoid valve SL1 circuit
Shift solenoid valve SL1
ECM
MONITOR DESCRIPTION
The ECM commands gearshift by turning the shift solenoid valves ºON/OFFº. When there is an open or short
circuit in any shift solenoid valve circuit, the ECM detects the problem and illuminates the MIL and stores
the DTC. And the ECM performs the fail-safe function and turns the other shift solenoid valves in good condi-
tion ºON/OFFº (In case of an open or short circuit, the ECM stops sending current to the circuit.).
MONITOR STRATEGY
Related DTCsP0748Shift solenoid valve SL1/Range check
Required sensors/ComponentsShift solenoid valve SL1
Frequency of operationContinuous
Duration1 sec.
MIL operationImmediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever the follow-
ing DTCs are not present.See page DI-361
Battery voltage10 V or more-
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
Output signal duty100%
COMPONENT OPERATING RANGE
ParameterStandard value
Output signal dutyLess than 100%

- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-433
626 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC P0751 Shift Solenoid ºAº Performance
(Shift Solenoid Valve S1)
SYSTEM DESCRIPTION
The ECM uses signals from the vehicle speed sensor and direct clutch speed sensor to detect the actual
gear position (1st, 2nd, 3rd, 4th or 5th gear). Then the ECM compares the actual gear with the shift schedule
in the ECM memory to detect mechanical problems of the shift solenoid valves, valve body or automatic
transmission (clutch, brake or gear etc.).
DTC No.DTC Detecting ConditionTrouble Area
P0751The gear required by the ECM does not match the actual gear
when driving (2-trip detection logic)
Shift solenoid valve S1 is stuck open or closed

Valve body is blocked up or stuck

Automatic transmission (clutch, brake or gear etc.)
MONITOR DESCRIPTION
The ECM commands gear shifts by turning the shift solenoid valves ºON/OFFº. According to the input shaft
revolution and output shaft revolution, the ECM detects the actual gear position (1st, 2nd, 3rd, 4th or 5th
gear position. When the gear position commanded by the ECM and the actual gear position are not same,
the ECM illuminates the MIL.
MONITOR STRATEGY
RltdDTCP0751Shift solenoid valve S1/OFF malfunctionRelated DTCsP0751Shift solenoid valve S1/ON malfunction
MainShift solenoid valve S1
Required sensors/ComponentsSubVehicle speed sensor, Throttle position sensor, Speed sensor (NT), Speed
sensor (NO)
Frequency of operationContinuous
OFF malfunction (A) and (B)0.4 sec.
OFF malfunction (C)Immediate
DurationON malfunction (A), (B) and
(C)0.4 sec.
ON malfunction (D)3 sec.
ON malfunction (E)0.5 sec.
MIL operation2 driving cycles
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The following conditions are common to all conditions below:
Off malfunction (A), (B), (C) and ON malfunction (A), (B), (C), (D), (E)
The monitor will run whenever the follow-
ing DTCs are not present.See page DI-361
DIC31-01