1998 TOYOTA LAND CRUISER Factory Repair Manual

battery change language parking brake tow hood release oil reset

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Page 1001 of 3115

TOYOTA LAND CRUISER 1998 Factory Repair Manual D12762
ECM
SLT+ SLT- G-B
G-W
E6
G12
EB2E6
13 6
14 E1
Electronically Controlled
Transmission Solenoid
G-B
G-W
EB23 6
SLT+ SLT-
GR DI-480
- DIAGNOSTICSAUTOMATIC TRANSMISSION
673 Author: Date:
2004 LA

Page 1002 of 3115

TOYOTA LAND CRUISER 1998 Factory Repair Manual 1
152 3 4 5 6 7 8
9 10 11 12
13 14
D11994SLT+
SLT-
D11583SLT+SLT-
E5E6E7E8E9
- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-481
674 Author: Date:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
1 Check t

Page 1003 of 3115

TOYOTA LAND CRUISER 1998 Factory Repair Manual D11987
2 1
DI-482
- DIAGNOSTICSAUTOMATIC TRANSMISSION
675 Author: Date:
2004 LAND CRUISER (RM1071U)
3 Check shift solenoid valve SLT.
PREPARATION:
(a) Jack up the vehicle.
(b) Remove the oil pan.

Page 1004 of 3115

TOYOTA LAND CRUISER 1998 Factory Repair Manual - DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-483
676 Author: Date:
2004 LAND CRUISER (RM1071U)
DTC P2740 Transmission Fluid Temperature Sensor ºBº
Circuit
DTC P2742 Transmission Fluid Temperature Sens

- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-483
676 Author: Date:
2004 LAND CRUISER (RM1071U)
DTC P2740 Transmission Fluid Temperature Sensor ºBº
Circuit
DTC P2742 Transmission Fluid Temperature Sensor ºBº
Circuit Low Input
DTC P2743 Transmission Fluid Temperature Sensor ºBº
Circuit High Input
CIRCUIT DESCRIPTION
The ATF temperature sensor converts fluid temperature into a resistance value which is input in to the ECM.
ATF temperature sensor No.2 is on the transmission and just before the oil cooler inlet pipeline.
If ECM detects the abnormally high temperature of ATF by this sensor, it draws driver's attention by illuminat-
ing the warning lamp.
HINT:
The temperature of ATF easily raises when towing, climbing hills and in traffic, etc.
If the ATF temperature sensor No.2 shorts, the signal that indicates the ATF temperature is 150C
(302F) or higher is input in ECM.
Vehicle conditions when sensor is in normal and when the vehicle is in short are indicated in the table
below.
ATF temperature No.2 Sensor
StateDetection ConditionSymptomRecovery Condition
Sensor is normal
AT fluid temp. more than 150C
(302F).AT Oil Temp. warning light re-
mains onAT fluid temp. less than 135C
(275F). *1
Sensor is normalAT fluid temp. more than 130C
(266F).Shift point too high.AT fluid temp. less than 110C
(230F).
Sensor is in shortAny conditions.
AT Oil Temp. warning light re-
mains on
Shift point too high.
Symptoms still occur
HINT:
*1: When AT fluid temperature is in normal range, it decreases to less than 135C within 5 minutes with the
shift lever in P or N position in a idling state.
DTC No.DTC Detecting ConditionTrouble Area
P2740
(a) and (b) is detected momentary within 0.5 sec. when neither
P2742 or P2743 is not detected (1-trip detection logic)
(a) ATF temperature sensor resistance is less than 79 W.
(b) ATF temperature sensor resistance is more than 156 kW.
HINT:
Wthin 0.5 sec. the malfunction switches from (a) to (b) or from
(b) to (a)
Open or short in ATF temperature sensor No. 2 circuit
ATF temperature sensor No. 2
P2742ATF temperature sensor resistance is less than 79 W. for 0.5
sec. or more (1-trip detection logic)ECM
P2743
DTC is detected for 0.5 sec. or more (1-trip detection logic)
ATF temperature sensor resistance is more than 156 kW. after
started engine for 15 minutes or more
DIC33-01

Page 1005 of 3115

TOYOTA LAND CRUISER 1998 Factory Repair Manual DI-484
- DIAGNOSTICSAUTOMATIC TRANSMISSION
677 Author: Date:
2004 LAND CRUISER (RM1071U)
MONITOR DESCRIPTION
The automatic transmission fluid (ATF) temperature sensor converts ATF temperature to a

Page 1006 of 3115

TOYOTA LAND CRUISER 1998 Factory Repair Manual D12759
Electronically Controlled
Transmission Solenoid
THO1
Y
1 2
E2ECM
4
28 E1
G-Y
11
10
9THO2
E5 E6E6
L
BR-W Y OO
G-Y
L
BR-W
If1 EB2EB2
OT+
OT2+ OT-
OT2-
EB3 BR-W BR-W BR-W
32432
1
152 3 4 5 6 7 8

Page 1007 of 3115

TOYOTA LAND CRUISER 1998 Factory Repair Manual D12792E2THO2
E5E6E7E8E9
DI-486
- DIAGNOSTICSAUTOMATIC TRANSMISSION
679 Author: Date:
2004 LAND CRUISER (RM1071U)
2 Measure resistance between terminal THO2 and E2 of ECM connector.
PREPARATION:
(a

Page 1008 of 3115

TOYOTA LAND CRUISER 1998 Factory Repair Manual D01769
- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-487
680 Author: Date:
2004 LAND CRUISER (RM1071U)
DTC P2757Torque Converter Clutch Pressure Control Solenoid
Performance(Shift Solenoid Valve SLU)
SYS

D01769
- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-487
680 Author: Date:
2004 LAND CRUISER (RM1071U)
DTC P2757Torque Converter Clutch Pressure Control Solenoid
Performance(Shift Solenoid Valve SLU)
SYSTEM DESCRIPTION
The ECM uses the signals from the Throttle Position Sensor
and Air-flow Meter to monitor the engagement condition of the
lock-up clutch.
Then the ECM compares the engagement condition of the
lock-up clutch with the lock-up schedule in the ECM memory
to detect mechanical trouble of the shift solenoid valve SLU,
valve body, torque converter clutch and automatic transmission
assembly (clutch, brake or gear etc.).
DTC No.DTC Detecting ConditionTrouble Area
P2757
Lock-up does not occur when driving in the lock-up range
(normal driving at 80 km/h [50 mph]), or lock-up remains ON
in the lock-up OFF range.
(2-trip detection logic)Shift solenoid valve SLU is stuck open or closed
Valve body blocked up or stuck
Lock-up clutch
Automatic transmission assembly
MONITOR DESCRIPTION
The ECM controls the oil pressure to the lock-up clutch based on engine-load information from the throttle
position sensor, crankshaft position sensor, input speed sensor, and the oil pressure sensor for shift-sole-
noid SLU. The ECM commands the shift-solenoid SLU using a duty-cycle control signal. In turn, the shift
solenoid operates the lock-up control valve and causes lock-up or flexible lock-up of the torque converter
clutch.
To monitor the condition of the lock up clutch, the ECM monitors the signals from the input speed sensor,
crank position sensor, the throttle position sensor, and air flow meter. The ECM uses this information to deter-
mine when the vehicle's torque converter clutch should be locked-up. The ECM can detect many mechani-
cal problems in the shift solenoids, valve body, and the transmission clutches, brakes, and gears. If the ECM
detects that the torque converter clutch locked below the minimum lock-up speed, it will illuminate the MIL
and store the DTC.
MONITOR STRATEGY
RltdDTCP2757Shift solenoid valve SLU/OFF malfunctionRelated DTCsP2757Shift solenoid valve SLU/ON malfunction
MainShift solenoid valve SLU
Required sensors/ComponentsSubValve body, Vehicle speed sensor, Throttle position sensor, Speed sensor
(NT), Speed sensor (NO)
Frequency of operationContinuous
DtiOFF malfunction2 sec.DurationON malfunction1.8 sec.
MIL operation2 driving cycles
Sequence of operationNone
DIB3L-02

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