parking brake TOYOTA SEQUOIA 2001 Service User Guide

± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±539
733 Author: Date:
2005 SEQUOIA (RM1146U)
(b) Measure the time lag.
When the shift lever is shifted while the engine is idling, there will be a certain time lapse or lag before
the shock can be felt. This is used for checking the condition of the direct clutch, forward clutch, and
1st and reverse brake.
NOTICE:

Perform the test at the normal operating ATF (Automatic Transmission Fluid) temperature: 50
to 80°C (122 to 176°F).

Be sure to allow for a 1 minute interval between tests.

Perform the test three times, and measure the time lags. Calculate the average value of the three
time lags.
(1) Connect a hand±held tester to DLC3.
(2) Fully apply the parking brake.
(3) Start and warm up the engine and check idle speed.
Idle speed: approx. 700 rpm (In N position and A/C OFF)
(4) Shift the lever from the N to D position. Using a stop watch, measure the time from when the lever
is shifted until the shock is felt.
Time lag:
N " D Less than 1.2 seconds
(5) In the same manner, measure the time lag for N " R.
Time lag:
N " R Less than 1.5 seconds
Evaluation (If N " D time or N " R time lag is longer than the specified):
ProblemPossible cause
N " D time lag is longer than specified

Line pressure is too low

Clutch No.1 (C
1) worn

One±way clutch No.3 (F
3) is not operating properly
N " R time lag is longer than specified

Line pressure is too low

Clutch No.3 (C
3) worn

Brake No.4 (B
4) worn

One±way clutch No.1 (F
1) is not operating properly

DIDIS±01
D14143
SST
SST
DI±540
± DIAGNOSTICSAUTOMATIC TRANSMISSION
734 Author: Date:
2005 SEQUOIA (RM1146U)
HYDRAULIC TEST
1. PERFORM HYDRAULIC TEST
Measure the line pressure.
NOTICE:

Perform the test at the normal operating ATF (Auto-
matic Transmission Fluid) temperature: 50 to 80°C
(122 to 176°F).

The line pressure test should always be carried out in
pairs. One technician should observe the conditions
of wheels or wheel stoppers outside the vehicle while
the other is performing the test.

Be careful to prevent SST hose from interfering with
the exhaust pipe.

This check must be conducted after checking and ad-
justing engine.

Perform under condition that A/C is OFF.

When conducting stall test, do not continue more
than 10 seconds.
(1) Warm up the ATF (Automatic Transmission Fluid).
(2) Lift the vehicle up.
(3) Remove the test plug on the transmission case cen-
ter right side and connect SST.
SST 09992±00095 (09992±00231, 09992±00271)
(4) Fully apply the parking brake and chock the 4
wheels.
(5) Start the engine and check idling speed.
(6) Keep your left foot pressing firmly on the brake ped-
al and shift into D position.
(7) Measure the line pressure when the engine is idling.
(8) Depress the accelerator pedal all the way down.
Quickly read the highest line pressure when engine
speed reaches stall speed.
(9) In the same manner, do the test in R position.

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

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)
C13480D14149
GND
2 V/DIV
20 ms/DIV
DI±596
± DIAGNOSTICSAUTOMATIC TRANSMISSION
790 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0722 Output Speed Sensor Circuit No Signal
CIRCUIT DESCRIPTION
The speed sensor SP2 detects the rotation speed of the transmission output shaft and sends signals to the
ECM. The ECM determines the vehicle speed based on these signals. An AC voltage is generated in the
speed sensor SP2 coil as the parking gear mounted on the rear planetary gear assy rotates, and this voltage
is sent to the ECM. The parking gear on the rear planetary gear is used as the timing rotor for this sensor.
The gear shift point and lock±up timing are controlled by the ECM based on the signals from this vehicle
speed sensor and the throttle position sensor signal.
DTC No.DTC Detection ConditionTrouble Area
P0722
All conditions below are detected 500 times or more continu-
ously (1±trip detection logic)
(a) No signal from speed sensor (SP2) is input to ECM while 4
pulses of No. 1 vehicle speed sensor signal are sent
(b) Vehicle speed is 9 km/h (6 mph) or more for at least 4 sec.
(c) Park/neutral position switch is OFF.
(d) Transfer position is except neutral (4WD).

Open or short in speed sensor (SP2) circuit

Speed sensor (SP2)

ECM

Automatic transmission (clutch, brake or gear, etc.)
Reference (Using an oscilloscope):
Check the waveform between terminals SP2+ and SP2±
of the ECM connector.
Standard: Refer to the illustration.
TerminalSP2+ ± SP2±
Tool setting2V/DIV, 20ms/DIV
Vehicle conditionVehicle speed 20 km/h (12 mph)
DIDJ9±01

DIDLV±01
F17996
Front Speed SensorABS & VSC Actuator
(w/ Skid Control ECU)Level Warning Switch
Rear Speed Sensor Rear Speed Sensor Rotor
Front Speed
Sensor Rotor
Parking Brake SwitchStop Light Switch
Center Diff. Lock Switch *1
TRAC OFF Switch *2
Steering Angle Sensor
DLC3Brake Inhibit RelayTranslate ECU
VSC BuzzerBrake Booster
(Including Active Brake Booster
Solenoid, Delta S Sensor and Boost-
er Pedal Switch)
Master Cylinder
Pressure Sensor
Front Speed Sensor Rotor
Front Speed Sensor
Yaw Rate Sensor
(Including Deceleration Sensor)
ABS Warning Light
VSC TRAC Warning light
VSC OFF Indicator Light *
1
TRAC OFF Indicator Light *2
BRAKE Warning Light
SLIP Indicator Light
*1: Only for 4WD
*2: Only for 2WDCenter Diff. Lock
Position Switch
DI±892
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1086 Author: Date:
2005 SEQUOIA (RM1146U)
LOCATION

DIDLW±01
F19153
Speed Sensor
(Each Wheel)
Stop Lamp Switch
Parking Brake Switch
Delta S Sensor
Yaw Rate
(Deceleration) SensorABS & VSC Actuator
Skid Control
ECUCombination
Meter
Translate
ECUSteering Angle
Sensor
4WD ECU
ECM
CAN Communication SystemAir Suspension ECU (*1): CAN1 Circuit
(*2): CAN2 Circuit
(*3): Vehicle CAN Circuit(*2)
(*3) (*1)
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±893
1087 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DIAGRAM

DIDM1±01
F13444
USA: CANADA:USA: CANADA:2WD: 4WD:
DI±910
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1104 Author: Date:
2005 SEQUOIA (RM1146U)
DIAGNOSIS SYSTEM
1. CHECK WARNING LIGHT
(a) Release the parking brake pedal.
(b) When the ignition switch is turned ON, check that the ABS
warning light, VSC TRAC warning light, VSC OFF (TRAC
OFF) indicator light, BRAKE warning light and SLIP indi-
cator light come on for approx. 3 seconds.
HINT:

When the parking brake is applied or the level of the brake
fluid is low, the BRAKE warning light comes on.

If the indicator check result is not normal, proceed to trou-
bleshooting for the ABS warning light circuit, VSC TRAC
warning light circuit, VSC OFF (TRAC OFF) indicator light
circuit, BRAKE warning light circuit or SLIP indicator light
circuit.
Trouble AreaSee page
ABS warning light circuitDI±1021 or
DI±1025
VSC TRAC warning light circuitDI±1027 or
DI±1031
VSC OFF (TRAC OFF) indicator light circuitDI±1048
BRAKE warning light circuitDI±1033 or
DI±1038
SLIP indicator light circuitDI±1041 or
DI±1045

The DTCs are simultaneously stored in the memory. The
DTCs can be read by connecting the SST between TC
and CG terminals of the DLC3 and observing the blinking
of the ABS and VSC warning lights, or by connecting a
hand±held tester.

This system has a sensor signal check function (TEST
MODE) (See page DI±899).
The DTC can be read by connecting the SST between ter-
minals TS and CG of the DLC3 and observing the blinking
of the ABS and VSC TRAC warning lights, or by connect-
ing a hand±held tester.

DIDM2±01
F09750
CG TcDLC3
R01346
Normal System Code
0.25 sec.
0.25 sec. 2 sec.
ON
OFF
ON
OFF0.5 sec. 0.5 sec.
Codes 11 and 21
4 sec.1.5 sec.
2.5 sec.
Code 11 Code 21
F09750
CG TcDLC3
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±911
1105 Author: Date:
2005 SEQUOIA (RM1146U)
DTC CHECK / CLEAR
USING SST (CHECK WIRE):
1. CHECK DTC
(a) Using SST, connect terminals Tc and CG of the DLC3.
SST 09843±18040
(b) Turn the ignition switch to the ON position.
(c) Read the DTC from the ABS and VSC TRAC warning
lights on the combination meter.
HINT:

If no code appears, inspect the diagnostic circuit, ABS
warning light circuit or VSC TRAC warning light circuit.
Trouble AreaSee page
Tc terminal circuitDI±1055
ABS warning light circuitDI±1021 or
DI±1025
VSC TRAC warning light circuitDI±1027 or
DI±1031

As examples, the blinking patterns for normal system
code and codes 11 and 21 are shown on the left.
(1) Codes are explained in the code table on page
DI±921.
(2) After completing the check, disconnect terminals Tc
and CG of the DLC3, and turn off the display.
If 2 or more trouble codes are identified at the same time, the
DTCs will be displayed in ascending order.
2. CHECK TRANSLATE DTC
HINT:
Once the ignition switch is turned off, all DTCs in the translate
ECU are cleared.
(a) Release the parking brake pedal.
(b) Check the brake fluid level.
(c) Using SST, connect terminals Tc and CG of the DLC3.
SST 09843±18040
(d) Read the DTC of the BRAKE warning light.
NOTICE:
When reading DTCs, be sure to be seated in the driver's
seat and depressing the brake pedal.

Trouble Code (Example Code 42, 44)
ON
OFF
0.5 sec.0.5 sec.
1.5 sec.2.5 sec.
4 sec.
Repeat
42
44
D05981
Hand±held
Tester
DLC3
DI±912
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1106 Author: Date:
2005 SEQUOIA (RM1146U)
HINT:

If no code appears, inspect the diagnostic circuit, and
BRAKE warning light circuit.
Trouble AreaSee page
Tc terminal circuitDI±1055
BRAKE warning light circuitDI±1033 or
DI±1038

When the parking brake is applied or the level of the brake
fluid is low, the BRAKE warning light comes on.

If all sensors are normal, a normal system code is output.
(A cycle of 0.25 sec. ON and 0.25 sec. OFF is repeated.)

If 2 or more trouble codes are identified at the same time,
the codes will be displayed in ascending order.
USING HAND±HELD TESTER:
3. CHECK DTC
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Read the DTC by following the prompts on the tester
screen.
HINT:
Refer to the hand±held tester operator's manual for further de-
tails.

DIDM5±01
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±917
1111 Author: Date:
2005 SEQUOIA (RM1146U)
DATA LIST / ACTIVE TEST
1. DATA LIST
HINT:
With the hand±held tester connected to the DLC3 and the ignition switch in the ON position, the ABS, TRAC
and VSC data list can be displayed. Follow the prompts on the tester screen to access the DATA LIST.
ItemMeasurement Item /
Range (Display)Normal ConditionDiagnostic Note
ABS MOT RELAYABS motor relay / ON or
OFFON : Motor relay ON
OFF : Motor relay OFF±
SOL RELAYSolenoid relay / ON or
OFFON : Solenoid relay ON
OFF : Solenoid relay OFF±
VSC / TRC OFF SWTRAC control switch / ON
or OFF
ON : TRAC control switch
ON
OFF : TRAC control switch
OFF
±
AIR BLD SUPPORTAir bleed support / ON or
OFFON : Support ON
OFF : Support OFF±
STOP LIGHT SWStop lamp switch / ON or
OFF
ON : Brake pedal de-
pressed
OFF : Brake pedal re-
leased
±
PKB SWParking brake switch / ON
or OFFON : Parking brake applied
OFF : Parking brake re-
leased
±
ABS OPERT FRABS operation (FR) / BE-
FORE or OPERATE
BEFORE : No ABS opera-
tion (FR)
OPERATE : During ABS
operation (FR)
±
ABS OPERT FLABS operation (FL) / BE-
FORE or OPERATE
BEFORE : No ABS opera-
tion (FL)
OPERATE : During ABS
operation (FL)
±
ABS OPERT RRABS operation (RR) / BE-
FORE or OPERATE
BEFORE : No ABS opera-
tion (RR)
OPERATE : During ABS
operation (RR)
±
ABS OPERT RLABS operation (RL) / BE-
FORE or OPERATE
BEFORE : No ABS opera-
tion (RL)
OPERATE : During ABS
operation (RL)
±
WHEEL SPD FR
Wheel speed sensor (FR)
reading / min.: 0 km/h (0
MPH), max.: 326 km/h
(202 MPH)
Actual wheel speedSimilar speed as indicated
on speedometer
WHEEL SPD FL
Wheel speed sensor (FL)
reading / min.: 0 km/h (0
MPH), max.: 326 km/h
(202 MPH)
Actual wheel speedSimilar speed as indicated
on speedometer
WHEEL SPD RR
Wheel speed sensor (RR)
reading / min.: 0 km/h (0
MPH), max.: 326 km/h
(202 MPH)
Actual wheel speedSimilar speed as indicated
on speedometer
WHEEL SPD RL
Wheel speed sensor (RL)
reading / min.: 0 km/h (0
MPH), max.: 326 km/h
(202 MPH)
Actual wheel speedSimilar speed as indicated
on speedometer