Page 1009 of 3115

DI-488
- DIAGNOSTICSAUTOMATIC TRANSMISSION
681 Author: Date:
2004 LAND CRUISER (RM1071U)
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The following items are common to all conditions below: OFF malfunction and ON malfunction
The monitor will run whenever the follow-
ing DTCs are not present.See page DI-361
Turbine speed sensor (NT) circuit
Output speed sensor (NO) circuit
Shift solenoid ºAº (S1) circuit
Shift solenoid ºBº (S2) circuitThere is no malfunction in the circuits shown on the leftShift solenoid ºEº (SR) circuitThere is no malfunction in the circuits shown on the left.
Torque converter clutch pressure control
solenoid circuit
KCS sensor circuit
ETCS (Electric throttle control system)Not system down
Transmission shift positionºDº
ECT (Engine coolant temperature)40°C (104°F) or more-
Spark advance from Max. retard timing by
KCS control0° CA or more-
EngineRunning
ECM selected gear4th or 5th
Vehicle speed25 km/h or more-
Shift solenoid ºAº (S1) circuit
Shift solenoid ºBº (S2) circuitTh i lf ti i th i it h th l ftPressure control solenoid ºBº (SL2) circuitThere is no malfunction in the circuits shown on the left.
1-2 Shift valve
Transfer neutral position switchOFF
Transfer rangeºHIGHº*1
Transfer range ºHIGHº *1 (This condition is applied only 4WD)
*1 Following conditions met
Vehicle speed sensor ºAº circuitTh i lf ti i th i it h th l ft Output shaft speed sensor circuitThere is no malfunction in the sensor circuits shown on the left.
Transfer output speed143 rpm or more-
NO/NOtf (Transfer input speed/Transfer
output speed)0.9 or moreLess than 1.1
OFF malfunction
ECM lock-up commandON
(SLU pressure: 513kpa or more)
Vehicle speed-Less than 100 km/h (62 mph)
ON malfunction
ECM lock-up commandOFF
(SLU pressure: less than 4kpa)
Throttle valve opening angle9% or more-
Vehicle speed-Less than 60 km/h (38 mph)
Page 1010 of 3115

D12795
12
(-)(+)
12
- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-489
682 Author: Date:
2004 LAND CRUISER (RM1071U)
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
OFF malfunction
Engine speed - Turbine speed70 rpm or more
ON malfunction
It is necessary 2 detections/one driving cycle
1st detection; temporary flag ON
2nd detection; pending fault code ON
Vehicle speed must be under 10 km/h (6 mph) once before 2nd detection
|Engine speed - Turbine speed|Less then 35 rpm
COMPONENT OPERATING RANGE
ParameterStandard value
Speed sensor (NT)Input speed is equal to engine speed when lock-up ON.
INSPECTION PROCEDURE
1 Check shift solenoid valve SLU operation.
PREPARATION:
(a) Jack up the vehicle.
(b) Remove the oil pan.
(c) Remove the shift solenoid valve SLU.
CHECK:
(a) Measure the resistance between terminals 1 and 2 of so-
lenoid connector.
Standard: 5.0 to 5.6 W at 20°C (68°F)
(b) Connect the positive (+) lead with an 21 W bulb to terminal
2 of solenoid connector and negative (-) lead to terminal
1 of the solenoid valve connector, then check the move-
ment of the valve.
Standard: Solenoid sounds operation noise.
OK:
Standard
NG Replace the shift solenoid valve SLU
(See page AT-8).
OK
Page 1011 of 3115
DI-490
- DIAGNOSTICSAUTOMATIC TRANSMISSION
683 Author: Date:
2004 LAND CRUISER (RM1071U)
2 Check valve body (See page DI-396).
NG Replace the valve body (See page AT-8).
OK
3 Check torque converter clutch (See page AT-34).
OK Repair or replace transmission (See page
AT-30).
NG
Replace the torque converter clutch
(See page AT-30).
Page 1012 of 3115

Current flow to solenoid
Lock-up
Operation
Pressure
BE4056D00160
1 cycle ON
OFFDuty Ratio
=
A + B
A
y 100 (%) (*)
- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-491
684 Author: Date:
2004 LAND CRUISER (RM1071U)
DTC P2759Torque Converter Clutch Pressure Control Solenoid
Control Circuit Electrical(Shift Solenoid Valve SLU)
CIRCUIT DESCRIPTION
The amount of current flow to the solenoid is controlled by the
(*) duty ratio of the ECM output signal. The higher the duty ratio
becomes, the higher the lock-up hydraulic pressure becomes
during the lock-up operation.
(*) Duty Ratio
The duty ratio is the ratio of the period of continuity in one cycle.
For example, if A is the period of continuity in one cycle, and B
is the period of non-continuity, then
DTC No.DTC detection conditionTrouble Area
P2759
The following condition is detected. (1-trip detection logic)
SLU output signal's duty ON of 3.3 msec. or more with duty
ratio of least 95% lasts for 1 second.Open or short in shift solenoid valve SLU circuit
Shift solenoid valve SLU
ECM
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 cause lock-up or flexible lock-up of the torque converter
clutch. The ECM illuminates the MIL and store the DTC when ECM detects an open or a short circuit malfunc-
tion in the shift solenoid valve SLU.
MONITOR STRATEGY
Related DTCsP2759Shift solenoid valve SLU/Range check
Required sensors/ComponentsShift solenoid valve SLU
Frequency of operationContinuous
Duration1 sec.
MIL operationImmediate
Sequence of operationNone
DIB3M-02
Page 1013 of 3115
D12762
E1
Electronically Controlled
Transmission SolenoidECM
16 2
EB2 E7
SLU
-
P-G
B 215SLU+LG
EB3E7 P-G
B BRSLU+
SLU- 513 DI-492
- DIAGNOSTICSAUTOMATIC TRANSMISSION
685 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
Battery voltage10 V or more-
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
Output signal duty100%
COMPONENT OPERATING RANGE
ParameterStandard value
Output signal dutyLess than 100%
WIRING DIAGRAM
Page 1014 of 3115

1
152 3 4 5 6 7 8
9 10 11 12
13 14
D11994SLU+
SLU-
D12791SLU+SLU-
E5E6E7E8E9
- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-493
686 Author: Date:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
1 Check transmission wire.
PREPARATION:
Disconnect the transmission wire connector.
CHECK:
Measure resistance between SLU+ and SLU- of transmission
wire.
OK:
Resistance: 5.0 to 5.6 W at 20°C (68°F)
CHECK:
Measure resistance between terminals SLU+ and SLU- of the
transmission wire connector and body ground.
OK:
Resistance: 1 MW or higher
NG Go to step 3.
OK
2 Measure resistance between terminal SLU+ and SLU- of ECM connector.
PREPARATION:
(a) Connect the transmission wire connector.
(b) Disconnect the connector of the ECM.
CHECK:
Measure resistance between terminals SLU+ and SLU- of ECM
connector.
OK:
Resistance: 5.0 to 5.6 W at 20°C (68°F)
CHECK:
Measure resistance between terminals SLU+ and SLU- of the
ECM connector and body ground.
OK:
Resistance: 1 MW or higher
NG Repair or replace the harness or connector
(See page IN-36).
OK
Check and replace the ECM (See page
IN-36).
Page 1015 of 3115
D12795
12
(-)(+)
12
DI-494
- DIAGNOSTICSAUTOMATIC TRANSMISSION
687 Author: Date:
2004 LAND CRUISER (RM1071U)
3 Check shift solenoid valve SLU.
PREPARATION:
(a) Jack up the vehicle.
(b) Remove the oil pan.
(c) Remove the shift solenoid valve SLU.
CHECK:
(a) Measure the resistance between terminals 1 and 2 of so-
lenoid connector.
Standard: 5.0 to 5.6 W at 20°C (68°F)
(b) Connect the positive (+) lead with an 21 W bulb to terminal
2 of solenoid connector and negative (-) lead to terminal
1 of the solenoid valve connector, then check the move-
ment of the valve.
Standard: Solenoid sounds operation noise.
OK:
Standard
NG Replace the shift solenoid valve SLU
(See page AT-8).
OK
Repair or replace the transmission wire
(See page AT-6).
Page 1016 of 3115

D12771
ECM
PWR E829 J/B No.4
E4
(*) Electronically Controlled
Transmission Pattern Select SW
5
W-B
IF IU19
SB Combination Meter
C1519
Cowl Side J/B LH
L-R
1
2
3
(*) Pattern Select Switch (PWR Mode Switch)
When the PWR mode switch is pushed in, the switch contact is made and the PWR mode is selected.
To cancel the PWR mode, push the PWR mode switch once again.C1520
SB312
4F 4C
W-BB
B
E8
E8
E818
28 2nd
PWR
5L-W 10
3M
3PCowl Side J/B RH
18
2E66 24
2E 2QP-B
SNWI MPX1 MPX2
- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-495
688 Author: Date:
2004 LAND CRUISER (RM1071U)
Pattern Select Switch Circuit (PWR Mode Switch)
CIRCUIT DESCRIPTION
The ECM memory contains the shift programs for the NORMAL and POWER patterns, 2 position, L position
and the lock-up patterns. Following the programs corresponding to the signals from the pattern select
switch, the park/neutral position and other various sensors, the ECM switches the solenoid valves ON and
OFF, and controls the transmission gear change and the lock-up clutch operation.
WIRING DIAGRAM
DI3C5-07