speed sensor TOYOTA SEQUOIA 2001 Service Repair Manual

I28261
± DIAGNOSTICSNAVIGATION SYSTEM
DI±2255
2449 Author: Date:
2005 SEQUOIA (RM1146U)
Speed signal error
INSPECTION PROCEDURE
1 Navigation check mode (Vehicle sensors check).
CHECK:
(a) Enter the ºNavigation Checkº mode (Vehicle Sensors)
(See page DI±2180).
(b) While driving, compare the ºSPDº indicator to the reading
on the speedometer. Check if these readings are almost
the same.
OK:
The readings are almost the same.
OK Replace radio and navigation assy.
NG
Proceed to next circuit inspection shown in diagnostic trouble code chart (See page DI±2203).
DIDD9±01

I28748SPD
Wire Harness View:
R29
4.5 to 14 V
0
Turn the wheel Below 2 V
DI±2292
± DIAGNOSTICSNAVIGATION SYSTEM
2486 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check operation of speedometer.
CHECK:
Drive the vehicle and check if the function of the speedometer in the combination meter is normal.
OK:
Actual vehicle speed and the speed indicated on the speedometer and the same.
HINT:
The vehicle speed sensor is functioning normally when the indication on the speedometer is normal.
NG Check combination meter assy
(See page DI±1645).
OK
2 Inspect combination meter assy.
PREPARATION:
Disconnect the radio and navigation assy connector.
CHECK:
(a) Move the shift lever to the neutral position.
(b) Jack up either one of the front wheels.
(c) Turn the ignition switch on.
(d) Measure the voltage between terminal SPD and body
ground of the radio and navigation assy when the front
wheels are turned slowly.
OK:
Voltage is pulses as shown below.
OK Replace radio and navigation assy.
NG

DI3F3±10
DI±2304
± DIAGNOSTICSAIR CONDITIONING SYSTEM
2498 Author: Date:
2005 SEQUOIA (RM1146U)
PROBLEM SYMPTOMS TABLE
Front A/C:
SymptomSuspected AreaSee page
Whole functions of the A/C system do not operate4. Integration control and panel
5. IG power source circuitIN±35
DI±2363
Air Flow Control: No blower operation
1. IG power source circuit
2. Heater main relay
3. Blower motor circuit
4. Integration control and panel
5. Blower motor controllerDI±2363
AC±95
DI±2374
IN±35
AC±83
Air Flow Control: No blower control
1. Blower motor circuit
2. Integration control and panel
3. Solar sensor circuit
4. Blower motor controllerDI±2374
IN±35
DI±2336
AC±83
Air Flow Control: Insufficient air flow1. Blower motor circuitDI±2374
Temperature Control: No cool air comes out
1. Refrigerant volume
2. Drive belt tension
3. Refrigeration system inspection with manifold gauge set
4. Compressor circuit
5. Pressure switch circuit
6. Front air mix damper position sensor circuit
7. Front air mix damper control servomotor circuit
8. Front room temp. sensor circuit
9. Ambient temp. sensor circuit
10.Vehicle speed signal circuit
11. Integration control and panelAC±23
AC±15
AC±3
DI±2381
DI±2342
DI±2346
DI±2355
DI±2319
DI±2322
DI±2370
IN±35
Temperature Control: No warm air comes out
1. Front air mix damper position sensor circuit
2. Front air mix damper control servomotor circuit
3. Front room temp. sensor circuit
4. Ambient temp. sensor circuit
5. Vehicle speed signal circuit
6. Front evaporator temp. sensor circuit
7. Integration control and panelDI±2346
DI±2355
DI±2319
DI±2322
DI±2370
DI±2325
IN±35
Temperature Control: Output air is warmer or cooler than the set
temperature or response is slow
1. Refrigerant volume
2. Drive belt tension
3. Refrigeration system inspection with manifold gauge set
4. Cooling fan system
5. Solar sensor circuit
6. Front room temp. sensor circuit
7. Ambient temp. sensor circuit
8. Vehicle speed signal circuit
9. Front evaporator temp. sensor circuit
10.Front air mix damper position sensor circuit
11. Front air mix damper control servomotor circuit
12.Front air inlet damper position sensor circuit
13.Front air inlet damper control servomotor circuit
14.Condenser
15.Evaporator
16.Heater radiator
17.Expansion valve
18.Integration control and panelAC±23
AC±15
AC±3
AC±96
DI±2336
DI±2319
DI±2322
DI±2370
DI±2325
DI±2346
DI±2355
DI±2349
DI±2358
AC±65
AC±24
AC±35
AC±29
IN±35

± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±2315
2509 Author: Date:
2005 SEQUOIA (RM1146U)BLOWER LEVEL
Blower motor speed level /
min.: Level 0 max.: 31Increases within a range between
0 and 31 as the speed increases.±
AMBI TEMP
Adjusted ambient temperature /
min.: ±30.8°C (±23.44°F)
max.: 50.8°C (123.44°F)
±±
SET TEMP SHIFTShift set temperature / +2C, +1C,
NORMAL, ±1C, ±2CCustomized value will be dis-
played±
AIR INLET MODEAir inlet mode / AUTO, MANUALCustomized value will be dis-
played±
COMPRESSOR MODECompressor mode / AUTO,
MANUALCustomized value will be dis-
played±
COMPRS/DEF OPERCompressor / DEF operation
mode / LINK, NORMALCustomized value will be dis-
played±
FOOT/DEF MODEFoot / DEF auto mode / ON, OFFCustomized value will be dis-
played±
DESTINATION
Destination / DOMEST, USA, EU-
ROPE, AUSTRAL, MIDEAST, NO
INFO
Changes with destination±
REAR ROOM TEMP
Room temperature sensor (Rear) /
min.: ±6.5°C (20.3°F)
max.: 57.25°C (135.05°F)Actual room temperature is dis-
played
Open in the circuit:
±6.5°C (20.3°F)
Short in the circuit:
57.25°C (135.05°F)
R±EVAP TEMP
Evaporator temperature sensor /
min.: ±29.7°C (±21.46°F)
max.: 59.55°C (139.19°F)Actual evaporator temperature is
displayed
Open in the circuit:
±29.7°C (±21.46°F)
Short in the circuit:
59.55°C (139.19°F)
SET TEMP REARSet temperature (Rear side) /
min.: 0 max.: 255Set temperature and displayed
temperature are the same.±
ESTIMATE TEMP±R
Estimated temperature (Rear side)
/ min.: ±200°C (±328°F)
max.: 200°C (392°F)Damper is at ºMAX. COOLº:
±200°C (±328°F)
Damper is at ºMAX. HOTº:
200°C (392°F)
±
A/M DAMP POS±RAir mix damper position (Rear
side) / min.: ±14% max.: 113.5%
Damper is at ºMAX. COOLº:
±10.0%
Damper is at ºMAX. HOTº
100.0%
±
A/M DAMP TARG±R
Air mix damper target position
(Rear side) /
min.: ±14% max.: 113.5%Damper is at ºMAX. COOLº:
±10.0%
Damper is at ºMAX. HOTº
100.0%
±
BLOWER LEVEL±RBlower motor speed level /
min.: Level 0 max.: 31Increases within a range between
0 and 31 as the speed increases.±
#CODESNumber of trouble codes /
min.: 0 max.: 255Number of DTCs will be displayed±
ENGINE AND ECT / ALL:
ItemMeasurement Item / Display
(Range)Normal ConditionDiagnostic Note
A/C SIGA/C signal / ON or OFFA/C ON: ON±
A/C MAG CLUTCHA/C magnet clutch / ON or OFFA/C magnet clutch ON: ON±

DI3F1±09
± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±2317
2511 Author: Date:
2005 SEQUOIA (RM1146U)
DIAGNOSTIC TROUBLE CODE CHART
If a malfunction code is displayed during the DTC check, check the circuit listed for that code in the table
below (Proceed to the page given for that circuit.)
DTC No.
(See page)Detection ItemTrouble AreaMemory
00Normal±±
11 *1
(DI±2319)
Front room temperature sensor circuit
Front room temp. sensor

Harness or connector between front room temp. sensor and
integration control and panel

Integration control and panel

(8.5 min. or more)
12 *2
(DI±2322)
Ambient temperature sensor circuit
Ambient temp. sensor

Harness or connector between ambient temp. sensor and
integration control and panel

Integration control and panel

(8.5 min. or more)
13
(DI±2325)
Front evaporator temperature sensor
circuit
Front evaporator temp. sensor

Harness or connector between front evaporator temp. sen-
sor and integration control and panel

Integration control and panel

(8.5 min. or more)
14
(DI±2328)
Engine coolant temperature sensor cir-
cuit
Engine coolant temp. sensor

Harness or connector between engine coolant temp. sensor
and ECM

Harness or connector between ECM and integration control
and panel

Integration control and panel

ECM
±
17
(DI±2330)
Rear evaporator temperature sensor
circuit
Rear evaporator temp. sensor

Harness or connector between rear evaporator temp. sensor
and integration control and panel

Integration control and panel

(8.5 min. or more)
19 *1
(DI±2333)
Rear room temperature sensor circuit
Rear room temp. sensor

Harness or connector between rear room temp. sensor and
integration control and panel

Integration control and panel

(8.5 min. or more)
21 *3
Solar sensor circuit (Open)
Solar sensor

Harness or connector between solar sensor and integration±
21 *3
(DI±2336)Solar sensor circuit (Short)
Harness or connector between solar sensor and integration
control and panel

Integration control and panel

(8.5 min. or more)
22 *4
(DI±2339)
All conditions below are detected for 3
sec. or more
(a) Engine speed: 450 rpm or more
(b) Ratio between engine and compres-
sor rpm deviates 20% or more in com-
parison to normal operation.
Compressor drive belt

Compressor lock sensor

Compressor

Harness or connector between compressor lock sensor and
integration control and panel

Integration control and panel
±
23
(DI±2342)
Open in pressure sensor circuit
Abnormal refrigerant pressure
[below 196 kPa (2.0 kgf/cm
2, 28 psi)
over 3,140 kPa (32.0 kgf/cm2, 455 psi)]

Pressure switch

Harness or connector between pressure switch and integra-
tion control and panel

Refrigerant pipe line

Integration control and panel
±

I28835
24
Y±B W±R
A3
A/C Magnetic Clutch
and Lock Sensor 2
1IG4
SG±TAM Integration Control
and Panel
13
I19LOCK
20
I19 Y±B W±R
J14
J/C
AA 23
Y±B
IG4
± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±2339
2533 Author: Date:
2005 SEQUOIA (RM1146U)
DTC 22 Compressor Lock Sensor Circuit
CIRCUIT DESCRIPTION
This sensor sends 1 pulse per engine revolution to the integration control and panel.
If the compressor speed divided by the engine speed is smaller than a predetermined value, the integration
control and panel turns the compressor OFF. The indicator flashes at about 1 second intervals.
DTC No.Detection ItemTrouble Area
22
All conditions below are detected for 3 sec. or more
(a) Engine speed: 450 rpm or more
(b) Ratio of engine to compressor speed deviates 20% or more
in comparison to normal operation.

Compressor drive belt

Compressor lock sensor

Compressor

Harness or connector between compressor lock sensor and
integration control and panel

Integration control and panel
WIRING DIAGRAM
DIDKY±01

I21123
Integration Control
and Panel
10
3A16
I19SPD G±O 10
3DSub J/B No. 4
G±O 3
C5 Combination Meter DI±2370
± DIAGNOSTICSAIR CONDITIONING SYSTEM
2564 Author: Date:
2005 SEQUOIA (RM1146U)
Vehicle Speed Signal Circuit
CIRCUIT DESCRIPTION
The integration control and panel monitors the vehicle speed through signals sent from the speed sensor.
It uses these signals to receive the ambient temperature sensor signal.
WIRING DIAGRAM
DI3WE±18

B17467
SF1XJ±01
D13872
Hand±Held Tester
DLC3
CAN VIM
± SFITHROTTLE BODY
SF±39
2773 Author: Date:
2005 SEQUOIA (RM1146U)
THROTTLE BODY
ON±VEHICLE INSPECTION
1. REMOVE THROTTLE BODY COVER
2. INSPECT SYSTEM OPERATION
(a) Inspect the throttle control motor for operating sound.
(1) Turn the ignition switch ON.
(2) When depressing the accelerator pedal, check the
running sound of the motor. Also, check that there
is no friction sound.
If operation is not as specified, check the throttle control motor
(see step 3), wiring and ECM.
(b) Inspect the accelerator pedal position sensor.
(1) Connect a hand±held tester to the Controller Area
Network Vehicle Interface Module (CAN VIM). Then
connect the CAN VIM to the Date Link Connector 3
(DLC3).
(2) Check that the MIL does not light up.
(3) When turning the accelerator pedal position sensor
lever to the full±open position, check that the
throttle valve opening percentage (THROTTLE
POS) of the CURRENT DATA showns the standard
value.
Standard throttle valve opening percentage:
60% or more
If operation is not as specified, check that the accelerator pedal
position sensor (see page DI±370), wiring and ECM.
If not using a hand±held tester, measure the voltage between
terminals (VTA1±E2, VTA2±E2) of the ECM connector (See
page DI±127).
(c) Inspect the idle speed.
(1) Start the engine and check that the MIL does not
light up.
(2) Allow the engine to warm up to normal operating
temperature.
(3) Turn the A/C compressor ON to OFF, and check the
idle speed.
Idle speed (Transmission in neutral): 700 ± 50 rpm
NOTICE:
Perform inspection without an electrical load.
(d) After checking the above (a) to (c), perform the driving test
and check that there is no sense of incongruity.

D13872
Hand±Held Tester
DLC3
CAN VIM
Rich Lean
Time14.6
3.3
Keep Engine Speed
(V)
B17513
Air±fuel
Ratio
± SFIAIR±FUEL RATIO (A/F) SENSOR
SF±71
2805 Author: Date:
2005 SEQUOIA (RM1146U)
(b) Connect a hand±held tester to the Controller Area Net-
work Vehicle Interface Module (CAN VIM). Then connect
the CAN VIM to the Date Link Connector 3 (DLC3).
(c) Turn the ignition switch ON.
(d) Select the following menu items : Data List / A/FS B1 S1
and O2S B1 S2.
(e) Warm up the A/F sensor by running the engine at 2,500
rpm for approximately 2 minutes.
(f) Keep the engine speed at 2,500 rpm and confirm that the
display of the ºA/FS B1 S1º is as shown in the illustration.
HINT:

The illustration may slightly differ from the display on the
hand±held tester.

The waveform of the A/F sensor is displayed only on the
hannd±heldtester .
(g) Confirm that the display of the ºO2S B1 S2º changes be-
tween 0 and 1 V with the engine speed at 2,500 rpm.
OK:
The voltage output oscillates more than 8 times in 10
seconds.
CAUTION:

Perform the check immediately after warming up the
engine.

If the voltage variation could not be verified, warm up
the heated oxygen sensor again. If it could not be veri-
fied even after warming up the sensor again, check
the DTC No. (See page DI±88)

D13884
A750E:
A750F:AT133±01
D13885
A750E:
A750F:
± AUTOMATIC TRANSMISSION (A750E, A750F)SPEED SENSOR
AT±5
2913 Author: Date:
2005 SEQUOIA (RM1146U)
SPEED SENSOR
ON±VEHICLE REPAIR
1. DISCONNECT NO. 1 VEHICLE SPEED SENSOR CON-
NECTOR
2. REMOVE NO. 1 VEHICLE SPEED SENSOR
Remove the bolt and No.1 vehicle speed sensor.
3. DISASSEMBLE NO. 1 VEHICLE SPEED SENSOR
(a) Remove the O±ring from the speedometer driven gear
assembly.
(b) Remove the clip and speedometer driven gear from the
speedometer driven gear sleeve.
4. ASSEMBLE NO. 1 VEHICLE SPEED SENSOR
(a) Install the speedometer driven gear and clip to the
speedometer driven gear sleeve.
(b) Coat a new O±ring with ATF.
(c) Install the O±ring to the speedometer driven gear assem-
bly.
5. INSTALL NO. 1 VEHICLE SPEED SENSOR
Install the No.1 vehicle speed sensor with the bolt.
Torque:
A750E: 9.8 N´m (100 kgf´cm, 86 in.´lbf)
A750F: 11.5 N´m (117 kgf´cm, 8 ft´lbf)
6. CONNECT NO. 1 VEHICLE SPEED SENSOR CON-
NECTOR