Page 968 of 3115
- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-447
640 Author: Date:
2004 LAND CRUISER (RM1071U) Last ECM selected gear
4th
Vehicle speed
(During transition from 4th to 5th gear)-Less than 100 km/h (62 mph)
ON malfunction (E)
ECM selected gear5th
Engine speed - Turbine speed (NE - NT)
(After transition from 4th to 5th gear)-Less than 150 rpm
Vehicle speed
(After transition from 4th to 5th gear)-Less than 100 km/h (62 mph)
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
Both of the following conditions are met:
ON lf ti (A) d (B) ON lf ti (C) ON malfunction (A) and (B), or ON malfunction (C)
ON malfunction (D) or (E)
ON malfunction (A)
Turbine speed/Output speed (NT/NO)
3.30 or more
and
7.50 or less
ON malfunction (B)
Turbine speed/Output speed (NT/NO)
1.28 or more
and
1.53 or less
ON malfunction (C)
Turbine speed/Output speed (NT/NO)
0.93 or more
and
1.07 or less
ON malfunction (D)
Turbine speed - Output speed x 4th gear ratio
(NT - NO x 4th gear ratio)1,000 rpm or more
ON malfunction (E)
Turbine speed - Output speed x 5th gear ratio
(NT - NO x 5th gear ratio)1,000 rpm or more
Page 969 of 3115
D12795
12
(-)(+)
12
DI-448
- DIAGNOSTICSAUTOMATIC TRANSMISSION
641 Author: Date:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
1 Check shift solenoid valve SL2 operation.
PREPARATION:
(a) Jack up the vehicle.
(b) Remove the oil pan.
(c) Remove the shift solenoid valve SL2.
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 shift solenoid valve SL2 (See page
AT-8).
OK
2 Check valve body (See page DI-396).
NG Repair or replace valve body (See page
AT-8).
OK
Repair or replace transmission
(See page AT-30).
Page 970 of 3115
- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-449
642 Author: Date:
2004 LAND CRUISER (RM1071U)
DTC P0778 Pressure Control Solenoid ºBº Electrical
(Shift Solenoid Valve SL2)
CIRCUIT DESCRIPTION
See page DI-426.
DTC No.DTC Detection ConditionTrouble Area
P0778
ECM checks for an open or short circuit in shift solenoid valves
SL2 (1-trip detection logic)
(a) When solenoid is energized, duty ratio exceed 75%
(b) When solenoid is not energized, duty ratio is less than 3%Open or short in shift solenoid valve SL2 circuit
Shift solenoid valve SL2
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.) (see page
DI-426).
MONITOR STRATEGY
Related DTCsP0778Shift solenoid valve SL2/Range check
Required sensors/ComponentsShift solenoid valve SL2
Frequency of operationContinuous
Duration1 sec.
MIL operation1 driving cycle
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%
DIB3C-02
Page 971 of 3115
D12762
SL2+
SL2- P-B
P-L
E6 E6 Y
V16 11
3ECM E1
Electronically Controlled
Transmission Solenoid
17
P-B
P-L SL2+
SL2-4
EB3
7
EB3
1
152 3 4 5 6 7 8
9 10 11 12
13 14
D11994SL2+
SL2-
DI-450
- DIAGNOSTICSAUTOMATIC TRANSMISSION
643 Author: Date:
2004 LAND CRUISER (RM1071U)
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check transmission wire.
PREPARATION:
Disconnect the transmission wire connector.
CHECK:
Measure resistance between SL2+ and SL2- of transmission
wire.
OK:
Resistance: 5.0 to 5.6 W at 20°C (68°F)
CHECK:
Measure resistance between terminals SL2+ and SL2- of the
transmission wire connector and body ground.
OK:
Resistance: 1 MW or higher
NG Go to step 3.
OK
Page 972 of 3115
D11583SL2+SL2-
E5E6E7E8E9
- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-451
644 Author: Date:
2004 LAND CRUISER (RM1071U)
2 Measure resistance between terminal SL2+ and SL2- of ECM connector.
PREPARATION:
(a) Connect the transmission wire connector.
(b) Disconnect the connector of the ECM.
CHECK:
Measure resistance between terminals SL2+ and SL2- of ECM
connector.
OK:
Resistance: 5.0 to 5.6 W at 20°C (68°F)
CHECK:
Measure resistance between terminals SL2+ and SL2- 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 973 of 3115
D12795
12
(-)(+)
12
DI-452
- DIAGNOSTICSAUTOMATIC TRANSMISSION
645 Author: Date:
2004 LAND CRUISER (RM1071U)
3 Check shift solenoid valve SL2.
PREPARATION:
(a) Jack up the vehicle.
(b) Remove the oil pan.
(c) Remove the shift solenoid valve SL2.
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 SL2
(See page AT-8).
OK
Repair or replace the transmission wire
(See page AT-6).
Page 974 of 3115
- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-453
646 Author: Date:
2004 LAND CRUISER (RM1071U)
DTC P0781 1-2 Shift
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
P0781The gear required by the ECM does not match the actual gear
when driving (2-trip detection logic)Valve body is blocked up or stuck (1-2 shift)
Automatic transmission assembly
ECM
MONITOR DESCRIPTION
The ECM calculates the ºactualº transmission gear by comparing the signals from the input speed sensor
and the output speed sensor. The ECM can detect many mechanical problems in the shift solenoids, valve
body, and the transmission clutches, brakes, and gears. If the ECM detects that the actual gear position and
the commanded gear position are different, it will illuminate the MIL and store the DTC.
MONITOR STRATEGY
Related DTCsP0781Valve body/Rationality check
MainValve body
Required sensors/ComponentsSubAutomatic transmission assembly, Speed sensor (NT), Speed sensor
(NO), Vehicle speed sensor, Throttle speed sensor
Frequency of operationContinuous
Condition (A) and (B)0.4 sec.
DurationCondition (C)3 sec.Duration
Condition (D)0.5 sec.
MIL operation2 driving cycles
Sequence of operationNone
DIB3D-02
Page 975 of 3115
DI-454
- DIAGNOSTICSAUTOMATIC TRANSMISSION
647 Author: Date:
2004 LAND CRUISER (RM1071U)
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The Following items are common to all conditions below: Condition (A), (B), (C) and (D)
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) circuit
Shift solenoid ºEº (SR) circuitThere is no malfunction in the circuits shown on the leftPressure control solenoid ºAº (SL1) circuitThere is no malfunction in the circuits shown on the left.
Pressure control solenoid ºBº (SL2) circuit
ECT (Engine coolant temperature) sensor
circuit
KCS sensor circuit
ETCS (Electric throttle control system)Not system down
Transmission shift positionºDº
ECT40°C (104°F) or more-
Spark advance from Max. retard timing by
KCS control0° CA or more-
EngineRunning
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 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
Condition (A)
ECM selected gear2nd
Vehicle speed2 km/h (1 mph) or more-
Output speed2nd " 1st down shift point or more-
Throttle valve opening angle6.5% or more at 2,000 rpm
(conditions vary with engine speed)-
Condition (B)
ECM selected gear4th
Vehicle speed2 km/h (1 mph) or more-
Throttle valve opening angle6.5% or more at 2,000 rpm
(conditions vary with engine speed)-
Condition (C)
Current ECM selected gear5th
Last ECM selected gear4th
Vehicle speed
(During transition from 4th to 5th gear)-Less than 100 km/h (62 mph)
Condition (D)
