speed sensor TOYOTA SEQUOIA 2001 Service Manual Online

DIDIK±01
D13871
Combination Meter
DLC3 Stop Light SwitchECM
Park/Neutral Position SwitchSpeed Sensor (SP2) Shift Solenoid Valve S1
Shift Solenoid Valve SR
Shift Solenoid Valve SLU
Shift Solenoid Valve SL2 ATF Temperature
Sensor No. 2Integration Control and Panel
(Shift Position L Switch)
MIL
Shift Solenoid Valve SL1
Shift Solenoid
Valve SLT
ATF Temperature
Sensor No.1
Shift Solenoid Valve S2
Speed Sensor (NT)

AT Oil Temp Warning LightShift Lever
(O/D Main Switch)
4WD:
4WD Control ECU
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±519
713 Author: Date:
2005 SEQUOIA (RM1146U)
LOCATION

DIDIL±01
D14205
Shift Solenoid Valve S1
MIL
(Malfunction Indicator Lamp) S1
S2
SL1
SL2
SLT
SLU
SR
WShift Solenoid Valve S2
Shift Solenoid Valve SL1
Shift Solenoid Valve SL2
Shift Solenoid Valve SLT
Shift Solenoid Valve SLU
Shift Solenoid Valve SR
OILW
AT Oil Temp Warning Light ECM Crankshaft Position Sensor
Engine CoolantTemperature Sensor
Combination Meter
Stop Lamp Switch Assy
DLC3
(Data Link Connector 3)THW VTA1, 2
VC
SPD
STPTH01
TC Throttle Position Sensor
ATF (Automatic Transmission
Fluid) Temperature Sensor No. 1Mass Air Flow Meter
Accelerator Pedal Position SensorVPA
VPA2
Shift Lever
(O/D Main Switch)
Input Speed Sensor (NT)NT
Output Speed Sensor (SP2)SP2
TH02
ATF (Automatic Transmission
Fluid) Temperature Sensor No. 2Skid Control ECUNSW
Park/Neutral Position Switch
R, D, 3, 2
VG
NE
L
ODMSIntegration Control and Panel
(Shift Position L Switch)
L4



: 4WD4WD Control ECU
CAN DI±520
± DIAGNOSTICSAUTOMATIC TRANSMISSION
714 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DIAGRAM
The configuration of the electronic control system in the A750E/A750F automatic transmission is as shown
in the following chart.

D14144
Warmed up
sufficiently
Approx.100 km/h
(62 mph)
Vehicle Speed
Approx. 80 km/h
(50 mph)
0
Normal acceleration
through all the gears from 1st to 5th
Lock±up ON
Vehicle Speed
Stop
(Idling)
Maintain a constant speed or gradual acceleration (with the throttle open)
for 3 minutes or more.
*1 DI±552
± DIAGNOSTICSAUTOMATIC TRANSMISSION
746 Author: Date:
2005 SEQUOIA (RM1146U)
HINT:
*1: Drive at such a speed in the uppermost gear, to engage lock±up. The vehicle can be driven at a speed
lower than that in the above diagram under the lock±up condition.
NOTICE:
It is necessary to drive the vehicle for approximately 30 minutes to detect DTC P0711 (ATF tempera-
ture sensor malfunction).

DIDIX±01
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±553
747 Author: Date:
2005 SEQUOIA (RM1146U)
PROBLEM SYMPTOMS TABLE
HINT:
If a normal code is displayed during the diagnostic trouble code check although the trouble still occurs, check
the electrical circuits for each symptom in the order given in the charts on the following pages and proceed
to the page given for troubleshooting.
The Matrix Chart is divided into 3 chapters.
1. Chapter 1: Electronic Circuit Matrix Chart
Refer to the table below when the trouble cause is considered to be electrical.
If the instruction ºProceed to next circuit inspection shown on matrix chartº is given in the flow chart
of each circuit, proceed to the circuit with the next highest number in the table to continue the check.
If the trouble still occurs even though there are no abnormalities in any of the other circuits, check and
replace the ECM.
HINT:
*1: When the circuit on which mark *1 is attached is defective, DTC could be output (see page DI±573).
SymptomSuspect AreaSee page
No up±shift
(A particular gear, from 1st to 4th gear, is not up±shifted)1. Shift solenoid valve (S1) circuit *1
2. Shift solenoid valve (S2) circuit *1
3. ECM
DI±641
DI±646
IN±35
No up±shift (4th " 5th)
1. O/D main switch circuit
2. Engine coolant temp. sensor circuit *1
3. Speed sensor NT circuit *1
4. Shift solenoid valve (SL1) circuit *1
5. Shift solenoid valve (SL2) circuit *1
6. Shift solenoid valve (SR) circuit *1
7. ECM
DI±688
DI±58
DI±591
DI±603
DI±631
DI±651
IN±35
No up±shift (3rd " 4th)
1. Engine coolant temp. sensor circuit *1
2. Shift solenoid valve (S2) circuit *1
3. ECM
DI±58
DI±646
IN±35
No up±shift (1st " 2nd)
1. Shift position L switch circuit
2. Shift solenoid valve (S2) circuit *1
3. ECM
DI±691
DI±646
IN±35
No down±shift (5th " 4th)
1. O/D main switch circuit
2. Shift solenoid valve (SL1) circuit *1
3. Shift solenoid valve (SL2) circuit *1
4. Shift solenoid valve (SR) circuit *1
5. ECM
DI±688
DI±603
DI±631
DI±651
IN±35
No down±shift (2nd " 1st)
1. Shift position L switch circuit
2. Shift solenoid valve (S2) circuit *1
3. ECM
DI±691
DI±646
IN±35
No down±shift
(A particular gear, from 1st to 4th gear, is not down±shifted)1. Shift solenoid valve (S1) circuit *1
2. Shift solenoid valve (S2) circuit *1
3. ECM
DI±641
DI±646
IN±35
No lock±up
1. ATF temperature sensor circuit *1
2. Stop light switch circuit *1
3. Speed sensor NT circuit *1
4. Shift solenoid valve (SLU) circuit *1
5. Engine coolant temp. sensor circuit *1
6. ECM
DI±582
DI±600
DI±591
DI±680
DI±58
IN±35
No lock±up off4. Shift solenoid valve (SLU) circuit *1
6. ECM
DI±680
IN±35

DI±554
± DIAGNOSTICSAUTOMATIC TRANSMISSION
748 Author: Date:
2005 SEQUOIA (RM1146U) Shift point too high or too low
1. Shift solenoid valve (SLT) circuit *1
2. Speed sensor NT circuit *1
3. Speed sensor SP2 circuit *1
4. Throttle position sensor circuit *1
5. ATF temperature sensor circuit *1
6. ECM
DI±662
DI±591
DI±596
DI±58
DI±582
IN±35
Up±shift to 5th from 4th while shift lever is in 4 position1. O/D main switch circuit
2. ECMDI±688
IN±35
Up±shift to 5th from 4th while engine is cold1. Engine coolant temp. sensor circuit *1
2. ECM
DI±58
IN±35
Up±shift to 4th from 3rd while shift lever is in 3 position1. Park/neutral position switch circuit *1
2. ECM
DI±576
IN±35
Up±shift to 3rd from 2nd while shift lever is in 2 position1. Park/neutral position switch circuit *1
2. ECM
DI±576
IN±35
Up±shift to 2nd from 1st while shift lever is in L position1. Shift position L switch circuit
2. ECMDI±691
IN±35
Harsh engagement (N " D)
1. Speed sensor NT circuit *1
2. Shift solenoid valve (SL1) circuit *1
3. Shift solenoid valve (SLT) circuit *1
4. ECM
DI±591
DI±603
DI±662
IN±35
Harsh engagement (Lock±up)
1. Speed sensor NT circuit *1
2. Speed sensor SP2 circuit *1
3. Shift solenoid valve (SLU) circuit *1
4. ECM
DI±591
DI±596
DI±680
IN±35
Harsh engagement (Any driving position)ECMIN±35
Poor acceleration
1. ATF temperature sensor No.2 circuit *1
2. Engine coolant temp. sensor circuit *1
3. Shift solenoid valve (SLT) circuit *1
4. ECM
DI±666
DI±58
DI±662
IN±35
No engine brakingECMIN±35
No kick±downECMIN±35
Engine stalls when starting off or stopping1. Shift solenoid valve (SLU) circuit *1
2. ECM
DI±680
IN±35
AT Oil Temp. warning light remains on1. ATF temperature sensor No.2 circuit*1DI±666
Lock±up at 3rd gear
1. AT F temperature sensor No.2 circuit 1
2. Engine coolant temp. sensor circuit *1DI±666
DI±58
Shift point too high
2. Engine coolant tem . sensor circuit
3. ECMDI 58
IN±35
Malfunction in shifting1. Park/neutral position switch circuit *1
2. ECM
DI±576
IN±35

D14146
5 V/DIV
1 ms/DIVGND
D14147
GND
5 V/DIV
1 ms/DIV
DI±560
± DIAGNOSTICSAUTOMATIC TRANSMISSION
754 Author: Date:
2005 SEQUOIA (RM1146U)SLT+ (E7±13) ± SLT± (E7±12)
B±R ± G±YSLT solenoid signalEngine idle speedPulse generation
(See waveform 1)
SR (E7±9) ± E1 (E6±1)G±R ± BRSR solenoid signal5th gear10 to 14 V
===1st gearBelow 1 V
SL2+ (E7±17) ± SL2± (E7±16)GR ± LG±BSL2 solenoid signalEngine idle speedPulse generation
(See waveform 3)
SL1+ (E7±19) ± SL1± (E7±18)R±B ± LSL1 solenoid signalEngine idle speedPulse generation
(See waveform 4)
THO1 (E7±24) ± E2 (E8±28)G ± G±WNo.1 ATF temperature
sensor signalNo.1 ATF temperature: 115
C (239

F) or moreBelow 1.5 V
THO2 (E7±32) ± E2 (E8±28)V ± G±WNo.2 ATF temperature
sensor signalNo.2 ATF temperature: 115
C (239

F) or moreBelow 1.5 V
SP2+ (E7±34) ± SP2± (E7±26)W±R ± Y±RSpeed sensor (SP2) sig-
nalVehicle speed 20 km/h (12 mph)Pulse generation
(See waveform 6)
NT+ (E7±35) ± NT± (E7±27)B ± WSpeed sensor (NT) signalEngine idle speedPulse generation
(See waveform 5)
STAR/NSW (E7±8) ± E1 (E6±1)B ± BRPark neutral switch signalIG switch ON and shift lever P and
N positionBelow 2 V
===IG switch ON and shift lever except
P and N position10 to 14 V
L4* (E6±13) ± E1 (E6±1)L±R ± BRTransfer L position switch
signalIG switch ON and transfer L posi-
tionBelow 1 V
===IG switch ON and transfer except L
position10 to 14 V
HINT:
*: 4WD
Waveform 1
Reference:
TerminalSLT+ ± SLT±
Tool setting5V/DIV, 1ms/DIV
Vehicle conditionEngine idle speed
Waveform 2
Reference:
TerminalSLU+ ± SLU±
Tool setting5V/DIV, 1ms/DIV
Vehicle condition5th (lock±up) or 6th (lock±up) gear

DIDJ2±01
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±567
761 Author: Date:
2005 SEQUOIA (RM1146U)
FAIL±SAFE CHART
1. FAIL±SAFE
This function minimizes the loss of the ECT functions when any malfunction occurs in a sensor or solenoid.
Malfunction PartFunction
Output Speed Sensor (SP2)During an output speed sensor malfunction, shift control is effected through the
input speed sensor signal (NT).
ATF Temp. Sensor No. 1During an ATF temperature sensor No. 1 malfunction, up±shift to the 5th and flex
lock±up clutch control are prohibited.
Shift Solenoid Valve S1, S2 and SR
The current to the failed solenoid valve is cut off and control is effected by operating
the other solenoid valves with normal operation.
Shift control is effected depending on the failed solenoid as described in the table
on the next page.
Shift Solenoid Valve SL1 and SL2During a solenoid valve SL1 or SL2 malfunction, up±shift to the 5th is prohibited.
Shift Solenoid Valve SLU
During a solenoid valve SLU malfunction, the current to the solenoid valve is
stopped. This stops lock±up control and flex lock±up control, fuel economy de-
creases.
Shift Solenoid Valve SLT
During a solenoid valve SLT malfunction, the current to the solenoid valve is
stopped. This stops line pressure optimal control, the shift shock increases. How-
ever, shifting is effected through normal clutch pressure control.
Fail Safe Function:
If either of the shift solenoid valve circuits has an open or short failure, the ECM turns the other shift solenoid
ºONº and ºOFFº in order to shift into the gear positions shown in the table below.
In case of a short circuit, the ECM stops sending current to the short circuited solenoid.
Even if starting the engine again in the fail±safe mode, the gear position remains in the same position.

± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±571
765 Author: Date:
2005 SEQUOIA (RM1146U)LOCK UP SOL
Lock Up Solenoid Status/
ON or OFF
Lock Up: ON

Except Lock Up: OFF±
SOLENOID (SLT)Shift Solenoid SLT Status/
ON or OFF

Accelerator pedal is depressed:
OFF

Accelerator pedal is released:
ON
±
SOLENOID (SLU)Shift Solenoid SLU Status/
ON or OFF
Lock Up: ON

Except Lock Up: OFF±
AT FLUID TEMP 1
ATF Temp. Sensor No.1 Value/
min.: ±40C (±40F)
max.: 215C (419F)
After Stall Test;
Approx. 80C (176F)

Equal to ambient temperature
when cold soakIf the value is º±40C (±40F)º or
º215C (419F)º, ATF temp. sen-
sor No.1 circuit is open or shorted.
AT FLUID TEMP 2
ATF Temp. Sensor No.2 Value/
min.: ±40C (±40F)
max.: 215C (419F)
After Stall Test;
Approx. 80C (176F)

Equal to ambient temperature
when cold soakIf the value is º±40C (±40F)º or
º215C (419F)º, ATF temp. sen-
sor No.2 circuit is open or shorted.
SPD (SP2)
Output shaft Speed/
min.: 0 km/h (0 mph)
max.: 255 km/h (158 mph)Vehicle stopped: 0 km/h (0 mph)
[HINT]
Equal to vehicle speed
±
SPD (NT)Input Turbine Speed/
display: 50 r/min
[HINT]

Lock±up ON (After warming up
the engine);
Input Turbine speed (NT) equal to
the engine speed.

Lock±up OFF (Idling at N posi-
tion);
Input Turbine speed (NT) nearly
equal to the engine speed.
±

DIDJ4±01
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±573
767 Author: Date:
2005 SEQUOIA (RM1146U)
DIAGNOSTIC TROUBLE CODE CHART
If a DTC is displayed during the DTC check, check the parts listed in the table below and proceed to the page
given.
HINT:
*1 :
... The MIL (Malfunction Indicator Lamp) lights up
*2 :  ... The ECM memorizes the trouble code if the ECM detects the DTC detection condition.
This DTC may be output when the clutch, brake and gear components etc. inside the automatic trans-
mission are damaged.
DTC No.
(See Page)Detection ItemTrouble AreaMIL *1Memory *2
P0500
(DI±278)Vehicle Speed Sensor ºAº
Open or short in speed sensor (SP2) circuit
Speed sensor (SP2)
ECM


P0705
(DI±576)Transmission Range Sensor Cir-
cuit Malfunction (PRNDL Input)Open or short in park/neutral position switch circuit
Park/neutral position switch
ECM


P0710
(DI±582)Transmission Fluid Temperature
Sensor ºAº CircuitOpen or short in ATF temperature sensor No.1 circuit
Transmission wire (ATF temperature sensor No.1)
ECM


P0711
(DI±588)Transmission Fluid Temperature
Sensor ºAº PerformanceTransmission wire (ATF temperature sensor No.1)

P0712
(DI±582)Transmission Fluid Temperature
Sensor ºAº Circuit Low InputShort in ATF temperature sensor No.1 circuit
Transmission wire (ATF temperature sensor No.1)
ECM


P0713
(DI±582)Transmission Fluid Temperature
Sensor ºAº Circuit High InputOpen in ATF temperature sensor No.1 circuit
Transmission wire (ATF temperature sensor No.1)
ECM


P0717
(DI±591)Input Speed Sensor Circuit No
Signal
Open or short in speed sensor (NT) circuit
Speed sensor (NT)
ECM
Automatic transmission (clutch, brake or gear, etc.)


P0722
(DI±596)Output Speed Sensor Circuit No
Signal
Open or short in speed sensor (SP2) circuit
Speed sensor (SP2)
ECM
Automatic transmission (clutch, brake or gear, etc.)


P0724
(DI±600)Brake Switch ºBº Circuit High
Short in stop light switch signal circuit
Stop light switch
ECM


P0748
(DI±603)Pressure Control Solenoid ºAº
Electrical
(Shift Solenoid Valve SL1)Open or short in shift solenoid valve SL1 circuit
Shift solenoid valve SL1
ECM


P0751
(DI±608)Shift Solenoid ºAº Performance
(Shift Solenoid Valve S1)Shift solenoid valve S1 remains open or closed
Valve body is blocked
Automatic transmission (clutch, brake or gear, etc.)


P0756
(DI±614)Shift Solenoid ºBº Performance
(Shift Solenoid Valve S2)Shift solenoid valve S2 remains open or closed
Valve body is blocked
Automatic transmission (clutch, brake or gear, etc.)


P0771
(DI±620)Shift Solenoid ºEº Performance
(Shift Solenoid Valve SR)
Shift solenoid valve SR remains open or closed
Shift solenoid valve SL1 remains open or closed
Valve body is blocked
Automatic transmission (clutch, brake or gear, etc.)



D14162
Clutch Drum
(Timing Rotor)
Input Speed Sensor NT
(Transmission Revolution Sensor NT)Output Speed Sensor SP2
(Transmission Revolution Sensor SP2)
Parking Gear
(Timing Rotor)
D14148
GND
1 V/DIV
2 ms/DIV
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±591
785 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0717 Input Speed Sensor Circuit No Signal
CIRCUIT DESCRIPTION
This sensor detects the rotation speed of the turbine which shows the input revolution of transmission. By
comparing the input turbine speed signal (NT) with the counter gear speed sensor signal (SP2), the ECM
detects the shift timing of the gears and appropriately controls the engine torque and hydraulic pressure ac-
cording to various conditions, thus, providing smooth gear shift.
DTC No.DTC Detection ConditionTrouble Area
P0717
All conditions below are detected for 5 secs. or more
(1±trip detection logic)
(a) Gear change is not performed
(b) Gear position: 4th or 5th
(c) T/M input shaft rpm: 300 rpm or less
(d) T/M output shaft rpm: 1,000 rpm or more
(e) Park/neutral position switch:

NSW input signal is OFF

R input signal is OFF

L input signal is OFF
(f) Shift solenoid valves, park/neutral position switch and ve-
hicle speed sensor are in normal operation

Open or short in speed sensor (NT) circuit

Speed sensor (NT)

ECM

Automatic transmission (clutch, brake or gear, etc.)
Reference (Using an oscilloscope):
Check the waveform between terminals NT+ and NT± of
the ECM connector.
Standard: Refer to the illustration.
TerminalNT+ ± NT±
Tool setting1V/DIV, 2ms/DIV
Vehicle conditionEngine idle speed (P or N position)
DIDJ8±01