2001 TOYOTA SEQUOIA brake light

B17446
Brake Pedal
DepressedBrake Pedal
Released ON
() ()
ST1±(+)E4
E6
E1(±)
DI±286
± DIAGNOSTICSENGINE
480 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check STP signal and ST1± voltage.
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON.
(c) Select the item ºDIAGNOSIS / ENHANCED OBD II /
DATA LIST / ALL / STOP LIGHT SWº.
CHECK:
Read the signal displayed on the hand±held tester.
OK:
Standard:
Brake PedalSpecified Condition
DepressedSTP Signal ON
ReleasedSTP Signal OFF
CHECK:
Measure the voltage between the specified terminals of the E4
and E6 ECM connectors.
OK:
Standard:
Tester ConnectionBrake PedalSpecified Condition
ST1± (E4±12) ±
E1 (E6±1)DepressedBelow 1.5 V
ST1± (E4±12) ±
E1 (E6±1)Released7.5 to 14 V
OK Check for intermittent problems (See page
DI±11).
NG

DIDIQ±01
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±535
729 Author: Date:
2005 SEQUOIA (RM1146U)
ROAD TEST
1. PROBLEM SYMPTOM CONFIRMATION
Based on the result of the customer problem analysis, try to reproduce the symptoms. If the problem is that
the transaxle does not shift up, shift down, or the shift point is too high or too low, conduct the following road
test referring to the automatic shift schedule and simulate the problem symptoms.
2. ROAD TEST
NOTICE:
Perform the test at the normal operating ATF (Automatic Transmission Fluid) temperature: 50 to 80°C
(122 to 176°F).
(a) D position test:
Shift into the D position and fully depress the accelerator pedal and check the following points. Check
up±shift operation.
(1) Check up±shift operation.
Check that 1 " 2, 2 " 3, 3 " 4 and 4 " 5th up±shifts take place, and that the shift points conform
to the automatic shift schedule (See page SS±24).
HINT:
5th Gear Up±shift Prohibition Control

Engine coolant temperature is 55 °C (131 °F) or less and vehicle speed is at 51 km/h (32 mph) or less.
4th Gear Up±shift Prohibition Control

Engine coolant temperature is 40 °C (104 °F) or less and vehicle speed is at 45 km/h (28 mph) or less.
5th Gear Lock±up Prohibition Control

Brake pedal is depressed.

Accelerator pedal is released.

Engine coolant temperature is 60 °C (140 °F) or less.
(2) Check for shift shock and slip.
Check for shock and slip at the 1 " 2, 2 " 3, 3 " 4 and 4 " 5th up±shifts.
(3) Check for abnormal noise and vibration.
Check for abnormal noise and vibration when up±shifting from 1 " 2, 2 " 3, 3 " 4 and 4 " 5
while driving with the shift lever in the D position, and check while driving in the lock±up condition.
HINT:
The check for the cause of abnormal noise and vibration must be done thoroughly as it could also be due
to loss of balance in the differential, torque converter clutch, etc.
(4) Check kick±down operation.
Check vehicle speeds when the 2nd to 1st, 3rd to 2nd, 4th to 3rd, and 5th to 4th kick±downs take
place while driving with the shift lever in the D position. Confirm that each speed is within the
applicable vehicle speed range indicated in the automatic shift schedule (See page SS±24).
(5) Check abnormal shock and slip at kick±down.
(6) Check the lock±up mechanism.

Drive in the D position (5th gear), at a steady speed (lock±up ON).

Lightly depress the accelerator pedal and check that the engine speed does not change
abruptly.
HINT:
If there is a big jump in engine speed, there is no lock±up.

DI±536
± DIAGNOSTICSAUTOMATIC TRANSMISSION
730 Author: Date:
2005 SEQUOIA (RM1146U)
(b) 4 (O/D OFF) position test:
Shift into the 4 (O/D OFF) position and fully depress the accelerator pedal and check the following
points.
(1) Check up±shift operation.
Check that the 1 " 2, 2 " 3 and 3 " 4 up±shifts take place and that the shift point conforms
to the automatic shift schedule (See page SS±24).
HINT:

There is no 5th up±shift in the 4 position.

4th Gear Lock±up Prohibition Control

Brake pedal is depressed.

Accelerator pedal is released.

Engine coolant temperature is 60 °C (140 °F) or less.
(2) Check engine braking.
While driving in the 4 position and 4th gear, release the accelerator pedal and check the engine
braking effect.
(3) Check for abnormal noises during acceleration and deceleration, and for shock at up±shift and
down±shift.
(4) Check the lock±up mechanism.

Drive in 4 position 4th gear, at a steady speed (lock±up ON).

Lightly depress the accelerator pedal and check that the engine speed does not change
abruptly.
HINT:
If there is a big jump in engine speed, there is no lock±up.
(c) 3 position test:
Shift into the 3 position and fully depress the accelerator pedal and check the following points.
(1) Check up±shift operation.
Check that the 1 " 2 and 2 " 3 up±shifts takes place and that the shift point conforms to the
automatic shift schedule (See page SS±24).
HINT:

There is no 4th up±shift and lock±up in the 3 position.

When the 2nd start switch is ON, there is no 1 "2 up±shift and 2 "1 down±shift.
(2) Check engine braking.
While running in the 3 position and 3rd gear, release the accelerator pedal and check the engine
braking effect.
(3) Check for abnormal noises during acceleration and deceleration, and for shock at up±shift and
down±shift.
(d) 2 position test:
Shift into the 2 position and fully depress the accelerator pedal and check the following points.
(1) Check up±shift operation.
Check that the 1 " 2 up±shift takes place and that the shift point conforms to the automatic shift
schedule (See page SS±24).
HINT:

There is no 3rd up±shift and lock±up in the 2 position.

When the 2nd start switch is ON, there is no 1 "2 up±shift and 2 "1 down±shift.

± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±537
731 Author: Date:
2005 SEQUOIA (RM1146U)
(2) Check engine braking.
While running in the 2 position and 2nd gear, release the accelerator pedal and check the engine
braking effect.
(3) Check for abnormal noises during acceleration and deceleration, and for shock at up±shift and
down±shift.
(e) L position test:
Shift into the L position and fully depress the accelerator pedal and check the following points.
(1) Check no up±shift.
While running in the L position, check that there is no up±shift to 2nd gear.
(2) Check engine braking.
While running in the L position, release the accelerator pedal and check the engine braking ef-
fect.
(3) Check for abnormal noises during acceleration and deceleration.
(f) R position test:
Shift into the R position, lightly depress the accelerator pedal, and check that the vehicle moves back-
ward without any abnormal noise or vibration.
CAUTION:
Before conducting this test, ensure that the test area is free from people and obstruction.
(g) P position test:
Stop the vehicle on a grade (more than 5°) and after shifting into the P position, release the parking
brake. Then, check that the parking lock pawl holds the vehicle in place.

DIDJ3±01
DI±570
± DIAGNOSTICSAUTOMATIC TRANSMISSION
764 Author: Date:
2005 SEQUOIA (RM1146U)
DATA LIST / ACTIVE TEST
1. DATA LIST
HINT:
According to the DATA LIST displayed by the OBD II scan tool or hand±held tester, you can read the value
of the switch, sensor, actuator and so on without parts removal. Reading the DATA LIST as the first step of
troubleshooting is one method to shorten labor time.
(a) Warm up the engine.
(b) Turn the ignition switch off.
(c) Connect the OBD II scan tool or hand±held tester to the DLC3.
(d) Turn the ignition switch to the ON position.
(e) Push the ºONº button of the OBD II scan tool or the hand±held tester.
(f) When you use the hand±held tester:
Select the item ºDIAGNOSIS / ENHANCED OBD II / DATA LISTº.
(g) According to the display on the tester, read the ºDATA LISTº.
ItemMeasurement Item/
Range (display)Normal ConditionDiagnostic Note
STOP LIGHT SWStop light SW Status/
ON or OFF
Brake Pedal is depressed: ON

Brake Pedal is released: OFF±
PNP SW [NSW]PNP SW Status/
ON or OFFShift lever position is;
P and N: ON
Except P and N: OFF
When the shift lever position dis-
played on the hand±held tester dif-
fers from the actual position, ad-
justment of the PNP switch or the
shift cable may be incorrect.
HINT:
When the failure still occurs even
after adjusting these parts,
See page DI±576.
LOWPNP SW Status/
ON or OFF

Shift lever position is 2: OFF
O

Shift position L switch Push: ON
O

Shift position L switch Push: OFF
=
2NDPNP SW Status/
ON or OFFShift lever position is;
2 and L: ON
Except 2 and L: OFF
=
3RDPNP SW Status/
ON or OFFShift lever position is;
3: ON
Except 3: OFF
=
DRIVEPNP SW Status/
ON or OFFShift lever position is;
D: ON
Except D: OFF
=
REVERSEPNP SW Status/
ON or OFFShift lever position is;
R: ON
Except R: OFF
=
OVERDRV CUT SW2O/D SW Status/
ON or OFF

IG SW ON: ON
O

O/D SW Push: OFF
O

O/D SW Push: ON
±
SHIFTActual Gear Position/
1st, 2nd, 3rd, 4th or 5th
Shift lever position is;

L: 1st

2: 1st or 2nd

3: 1st, 2nd or 3rd

4(O/D OFF): 1st, 2nd, 3rd or 4th

D: 1st, 2nd, 3rd, 4th or 5th
±

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.)



DI±600
± DIAGNOSTICSAUTOMATIC TRANSMISSION
794 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0724 Brake Switch ºBº Circuit High
CIRCUIT DESCRIPTION
The purpose of this circuit is to prevent the engine from stalling while driving in lock±up condition when
brakes are suddenly applied.
When the brake pedal is depressed, this switch sends a signal to the ECM. Then the ECM cancels the opera-
tion of the lock±up clutch while braking is in progress.
DTC No.DTC Detection ConditionTrouble Area
P0724
The stop light switch remains ON even when the vehicle is
driven in a STOP (less than 3 km/h (2 mph)) and GO (30 km/h
(19 mph) or more) fashion 5 times. (2±trip detection logic).
Short in stop light switch signal circuit

Stop light switch

ECM
MONITOR DESCRIPTION
This DTC indicates that the stop light switch remains on. When the stop light switch remains ON during ºstop
and goº driving, the ECM interprets this as a fault in the stop light switch and the MIL comes on and the ECM
stores the DTC. The vehicle must stop (less than 3 km/h (2 mph)) and go (30 km/h (19 mph) or more) ten
times for two driving cycles in order to detect a malfunction.
MONITOR STRATEGY
Related DTCsP0724Stop light switch/Range check/Rationality
Rid /C tMainStop light switchRequired sensors/ComponentsSubVehicle speed sensor
Frequency of operationContinuous
DurationGO and STOP 5 times
MIL operation2 driving cycles
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever this DTC is
not present.See page DI±545
Battery voltage8 V or more±
Ignition switchON
StarterOFF
GO (Vehicle speed is 30 km/h
(18.63 mph) or more)Once
STOP (Vehicle speed is less than 3 km/h
(1.86 mph))Once
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
Brake switchRemain ON during GO and STOP 5 times
DIDJA±01

± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±601
795 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM
See page DI±283.
INSPECTION PROCEDURE
1 Read value of DATA LIST (STP signal).
HINT:
According to the DATA LIST displayed by the OBD II scan tool or hand±held tester, you can read the value
of the switch, sensor, actuator and so on without parts removal. Reading the DATA LIST as the first step of
troubleshooting is one method to shorten labor time.
(a) Warm up the engine.
(b) Turn the ignition switch off.
(c) Connect the OBD II scan tool or hand±held tester to the DLC3.
(d) Turn the ignition switch to the ON position.
(e) Push the ºONº button of the OBD II scan tool or the hand±held tester.
(f) When you use the hand±held tester:
Select the item ºDIAGNOSIS / ENHANCED OBD II / DATA LISTº.
(g) According to the display on the tester, read the ºDATA LISTº.
Standard:
ItemMeasurement Item/
Range (display)Normal Condition
Stop Light SwitchStop light SW Status/
ON or OFF
Brake Pedal is depressed: ON

Brake Pedal is released: OFF
NOTICE:
In the table above, the conditions listed under ºNormal Conditionº are reference conditions. Do not
depend solely on these reference conditions when deciding whether a part is faulty or not.
OK:
Brake Pedal ConditionSpecified Condition
DepressedON
ReleasedOFF
NG Go to step 2.
OK
Go to step 3.