speed sensor TOYOTA SEQUOIA 2001 Service Repair Manual

F16976
ABS & VSC Actuator
(Skid Control ECU) P20
Pedal Stroke Speed Sensor
(Delta S Sensor)
(Shielded)
Instrument Panel J/BVCP
PIM
E3 S1 3
BR
J28
J/C
A
IEVCP1
S1
S1 8 14
PIM
E3
A
A J8
J/C
W±B W±B
1F
1K12 9 5
3G
Y
L DI±960
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1154 Author: Date:
2005 SEQUOIA (RM1146U)
DTC C1247 / 47 Malfunction in Delta S Sensor
CIRCUIT DESCRIPTION
Detects a problem with booster negative pressure and enters assist control.
DTC No.DTC Detecting ConditionTrouble Area
C1247 / 47
When any of the following conditions are detected:
1. When the output becomes 4.7 V or more or 0.2 V or less
per 100 msec.
2. When the output does not return to 2.5 V even when 500
msec. or more elapse, in spite of no change in brake
operation.

Brake booster

Delta S sensor (Pedal stroke speed sensor)

Delta S sensor (Pedal stroke speed sensor) circuit

Skid control ECU
WIRING DIAGRAM
DIDMB±01

F19800
(1): Brake Pedal
Depressed
(2): Brake Pedal
Released Voltage
Time 4.5 V
1.9 V
0.5 V(2)
(1)
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±961
1155 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 in the case of using the hand±held tester and start from step 2 in the case
of not using the hand±held tester.
1 Check output value of the delta S sensor (pedal stroke speed sensor) using the
hand±held tester.
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Run the engine until the engine speed reaches 3,000 rpm, and return it back to idle.
HINT:
Rev up the engine to ensure sufficient vacuum.
(d) Select DATA LIST mode on the hand±held .
ItemMeasurement Item /
Range (Display)Normal ConditionDiagnostic Note
PEDAL STROKEPedal stroke sensor/
min.: 0 V, max.: 5.1 V
Approximately 2.0 V with-
out the brake pedal de-
pressed.
±
HINT:

The result appears on the tester after some delay because a time lag occurs in measurement with a
hand±held tester.

If a signal from the delta S sensor is sent between sampling, the result does not appear on the tester.
So be sure to perform the measurement 2 or 3 times.
CHECK:
Check that the brake pedal acceleration value of the delta S sensor displayed on the hand±held tester
changes, alternatively increasing the brake pedal stroke.
OK:
The value changes as shown in the illustration on the
left. (The value will return to approximately 2.0 V after
the brake pedal is released.)
HINT:
The maximum voltage depends on pedal stroke speed but
should not exceed 4.5 V or fall below 0.2 V.
OK Replace skid control ECU
(See page BR±52).
NOTICE:
When replacing the skid control ECU, perform zero point
calibration (See page DI±897).
NG

F19145
Delta S Sensor
(Pedal Stroke
Speed Sensor
VCP
DI±962
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1156 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check for open or short circuit in harness and connector between delta S sensor
(pedal stroke speed sensor) and skid control ECU (See page IN±35).
NG Repair or replace harness or connector.
OK
3 Inspect the delta S sensor (pedal stroke speed sensor ) terminal voltage (VCP
terminal)
PREPARATION:
Disconnect the delta S sensor (pedal stroke speed sensor) con-
nector.
CHECK:
(a) Turn the ignition switch to the ON position.
(b) Measure the voltage between VCP terminal and body
ground.
OK:
Voltage: 5 V
NG Replace skid control ECU
(See page BR±52).
NOTICE:
When replacing the skid control ECU, perform zero point
calibration (See page DI±897).
OK
Replace brake booster (See page BR±22).

± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±975
1169 Author: Date:
2005 SEQUOIA (RM1146U)
DTC C1337 / 37 Some Tire Are Different in Size From
the Other Tires
CIRCUIT DESCRIPTION
Skid control ECU measure the speed of each wheel by receiving signals from speed sensor. These signals
are used for recognizing all 4 wheels are operating properly. Therefore, all wheel signals must be equal.
DTC No.DTC Detecting ConditionTrouble Area
C1337 / 371 or 2 tires of different size are used for driving.Tire size
INSPECTION PROCEDURE
1 Check tire size.
CHECK:
Check tire size and condition of all 4 wheels.
NG Replace tires so that all 4 tires are the same in
size.
OK
2 Check speed sensor (See page DI±925).
NG Replace speed sensor.
OK
3 Check speed sensor rotor (See page DI±925).
NG Replace speed sensor rotor.
OK
DI93T±03

DI±976
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1170 Author: Date:
2005 SEQUOIA (RM1146U)
4 Check harness and connector between speed sensor and skid control ECU
(See page IN±35).
NG Repair or replace harness or connector.
OK
Replace skid control ECU
(See page BR±52).
NOTICE:
When replacing the skid control ECU, perform the zero point calibration (See page DI±897).

D6
DataLink
Connector
F19789
ABS & VSC Actuator
(Skid Control ECU)
R±L
T5 27
TS2440
S1
12
O
IG TS
CG
4R±LR±L
R±LTS
IL1 Translate ECU
3
O
AA J43
J/C4C 4B
4A6 66 Sub J/B No.4
(*) CAN1 Circuit (*)
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±1057
1251 Author: Date:
2005 SEQUOIA (RM1146U)
Ts Terminal Circuit
CIRCUIT DESCRIPTION
In sensor check mode (test mode), a malfunction of the speed sensor that cannot be judged when the vehicle
is stopped is judged while driving.
Transition to sensor check mode (test mode) can be performed by connecting terminals Ts and CG of the
DLC3 and turning the ignition switch from OFF to ON.
WIRING DIAGRAM
DI94A±05

DIDI0±01
DI±1064
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
1258 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DESCRIPTION
1. BRIEF DESCRIPTION
(a) The CAN (Controller Area Network) is a serial data communication system for real time application.
It is an in±vehicle multiplex communication system that has a high communication speed (500 kbps)
and the function to detect malfunctions.
(b) By pairing the CANH and CANL bus lines, the CAN performs communication based on differential volt-
age.
(c) Many ECUs (sensors) installed in the vehicle operate by sharing information and communicating with
each other.
(d) The CAN has two resistors of 120 W which are necessary to communicate with the main bus line.
2. DEFINITION OF TERMS
(a) Main bus line
(1) The main bus line is a wire harness between the two terminus circuits on the bus (communication
line). This is the main bus in the CAN communication system.
(b) Sub bus line
(1) The sub bus line is a wire harness that diverges from the main bus line to the ECU.
3. ECUs THAT COMMUNICATE THROUGH CAN COMMUNICATION SYSTEM
(a) Translate ECU
(b) Suspension Control ECU
(c) ECM
4. DIAGNOSTIC CODE FOR CAN COMMUNICATION SYSTEM
DTCs for the CAN communication system are as follows:
U0100/65, U0122/67, U0132/72, 65, 94.
HINT:
If C1201/51, C1202/52 or C1203/53 is output from skid control ECU, perform troubleshooting of each diag-
nosis code (see page DI±921).
5. REMARK FOR TROUBLESHOOTING
(a) Trouble in the CAN bus (communication line) can be checked from the DLC3 (except when there is
a wire break in lines other than the sub bus line of the DLC3).
NOTICE:
Do not insert the tester directly into the DLC3 connector. Be sure to use a service wire.
(b) The CAN communication system cannot detect trouble in the sub bus line of the DLC3 even though
the DLC3 is also connected to the CAN communication system.
6. HOW TO DISTINGUISH THE CAN J/C CONNECTOR
In the CAN communication system, all connectors connected to the CAN J/C are the same shape. The con-
nectors connected to the CAN J/C can be distinguished by the colors of the bus lines.
HINT:
See ºTERMINALS OF ECUº (see page DI±1068) for bus line colors.

H24635
Rollover Detection:
Side Collision and Rollover Detection:(a)
(b)
Airbag Sensor Assembly
Roll Rate Sensor 1
Roll Rate Sensor 2
Lateral Deceleration Sensor
Curtain Shield Airbag
Assembly (LH and RH)
Seat Belt Pretensioner
(LH and RH)
(c) (b)
Airbag Sensor Assembly
Roll Rate Sensor 1
Roll Rate Sensor 2
Lateral Deceleration Sensor
Curtain Shield Airbag
Sensor Assembly
Side Airbag Sensor
Assembly (
)Curtain Shield Airbag
Assembly (LH and RH)
Seat Belt Pretensioner
(LH and RH)Side Airbag of Collision
Side (
)
Activate depending on the
condition of the collision.
: DI±1124
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1318 Author: Date:
2005 SEQUOIA (RM1146U)
(d) w/ Side and curtain shield airbag:
Roll sensing of curtain shield airbag control.
(1) The airbag sensor assembly contains a roll rate sensor and roll rate sensor (that determine the
inclination angle the vehicle) and a lateral deceleration sensor (that determine the lateral force
that is applied to the vehicle). These sensors detect the vehicle's roll angle, rotational speed, and
lateral acceleration speed.
(2) Based on the information obtained from sensors, the airbag sensor assembly makes an overall
judgment of the vehicle's roll angle rotational speed, and lateral acceleration speed. If the airbag
sensor determines that the vehicle has rolled over due to cause other than the side collision, it
deploys the right and left curtain shield airbags and the front right and left seat belt pretensioners.
(3) This system provides a roll sensing of curtain shield airbags cutoff switch (RSCA OFF switch)
on the driver side of the instrument panel with which the driver can stop the operation of the func-
tion.
(4) By operating the RSCA OFF switch and while the roll sensing of the curtain shield airbag control
is OFF, and when the airbag sensor assembly judges to operate the side and curtain shield air-
bag system in the event of side collision, it is no need prohibit this operation.

I28449
Position Control
ECU & Switch
SLD± SLD+ FRV± FRV+
LFT± LFT+RCL± RCL+ 2 1
21
21
2 13 M7
M7
M7
M7
M7
M7
M7
M724 6
9 7 108
BR P14
Power Seat Motor
(Driver's Seat Front Vertical Control)
P16
Power Seat Motor
(Driver's Seat Reclining Control)P
V W B G
Y L P15
Power Seat Motor
(Driver 's Seat Rear Vertical Control)
P17
Power Seat Motor
(Driver's Seat Slide Control)
± DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)DI±1525
1719 Author: Date:
2005 SEQUOIA (RM1146U)
Power seat motor circuit
CIRCUIT DESCRIPTION
When the power seat control switch is operated, a command signal is sent to the position control ECU. The
position control ECU then controls the appropriate seat motor as needed. This memory system does not use
a seat position sensor. The seat position is detected by counting pulses that are output when the motor turns.
If there is no pulse output from the motor, the motor will stop operating. The ECU is designed so that a mal-
function of the seat memory system will not interfere with manual seat control.
When the position control ECU switch assy detects the low motor speed or abnormal activity, the system
stops the motor. When the motor continuously operates for 120 seconds or more, the system will stop the
motor until the switch is turned off.
WIRING DIAGRAM
DIDEB±01

DI26X±44
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±1541
1735 Author: Date:
2005 SEQUOIA (RM1146U)
PROBLEM SYMPTOMS TABLE
If a normal system code is displayed during the DTC check but the problem still occurs, check the circuits
for each problem symptom in the order given in the table below and proceed to the relevant troubleshooting
page.
HINT:
Inspect the ºFuseº and ºRelayº before confirming the suspected areas shown in the table below.
Inspect each suspected area in numerical order, in relation to the corresponding symptom.
If the malfunction still exists after checking and confirming that all the circuits are normal, replace the ECM.
SymptomSuspected AreaSee page
Main switch cannot be turned ON.
(Cruise indicator light in combination meter does not come on.)
1. Cruise control switch circuit
2. CRUISE main indicator light circuit
3. Combination meter system
4. ECMDI±1561
DI±1557
DI±1608
IN±35
Vehicle speed setting cannot be done.
(Although indicator light in combination meter comes on when
main switch is turned ON, it goes off when vehicle speed is set.)1. Cruise control switch circuit
2. ECMDI±1561
IN±35
Setting cannot be done.
(Indicator light in combination meter comes on when main switch
is turned ON and it remains ON while setting.)
1. Cruise control switch circuit
2. Vehicle speed sensor circuit (DTC P0500)
3. Stop light switch circuit (DTC P0571)
4. Park/neutral position switch circuit (DTC P0705)
5. O/D main switch circuit
6. Combination meter system
7. ECMDI±1561
DI±278
DI±1552
DI±576
DI±688
DI±1610
IN±35
While vehicle is driven with cruise control, set control is cancelled.
(Indicator light and CRUISE remain ON.)
1. Cruise control switch circuit
2. Vehicle speed sensor circuit (DTC P0500)
3. Stop light switch circuit (DTC P0571)
4. CRUISE main indicator light circuit
5. Park/neutral position switch circuit (DTC P0705)
6. Combination meter system
7. ECMDI±1561
DI±278
DI±1552
DI±1557
DI±576
DI±1608
IN±35
Hunting
(Speed is not constant.)1. Vehicle speed sensor circuit (DTC P0500)
2. ECMDI±278
IN±35
Setting cannot be cancelled.
(When coast, acceleration, resume, or set speed change function
is operated with control switch.)1. Cruise control switch circuit
2. ECMDI±1561
IN±35
DTC is not output, or is output when it should not be.1. Diagnosis circuitDI±1567
CRUISE main indicator light does not come on.
1. Cruise control switch circuit
2. CRUISE main indicator light circuit
3. Combination meter system
4. ECMDI±1561
DI±1557
DI±1610
IN±35