Toyota Sequoia (2005). Manual - part 201

D14165

Sensor Side:
(Connector Front View):

2

1

V2

D14166

ECM:

SP2+

SP2–

E8

E7

E6

E5

E4

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

DI–599

793

2

Inspect speed sensor SP2.

PREPARATION:
Disconnect the speed sensor connector from the transmission.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Tester Connection

Specified Condition

20 



C (68 



F)

1 – 2

560 to 680 

Ω

NG

Replace speed sensor SP2 (See page 

AT–5

).

OK

3

Check harness and connector (ECM – speed sensor SP2).

PREPARATION:
(a)

Connect the speed sensor connector.

(b)

Disconnect the ECM connector.

CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Tester Connection

Specified Condition

20



C (68



F)

E7 – 34 (SP2+) – E7 – 26 (SP2–)

560 to 680 

Ω

CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Tester Connection

Specified Condition

E7 – 34 (SP2+) – Body ground

10 k

Ω

 or higher

E7 – 26 (SP2–) – Body ground

↑

NG

Repair or replace the harness or connector
(See page 

IN–35

).

OK

Replace the ECM (See page 

SF–80

).

DI–600

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

794

DTC

P0724

Brake Switch ”B” 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 Condition

Trouble 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 ”stop
and go” 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 DTCs

P0724

Stop light switch/Range check/Rationality

R

i d

/C

t

Main

Stop light switch

Required sensors/Components

Sub

Vehicle speed sensor

Frequency of operation

Continuous

Duration

GO and STOP 5 times

MIL operation

2 driving cycles

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

It

Specification

Item

Minimum

Maximum

The monitor will run whenever this DTC is

not present.

See page 

DI–545

Battery voltage

8 V or more

–

Ignition switch

ON

Starter

OFF

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 criteria

Threshold

Brake switch

Remain ON during GO and STOP 5 times

DIDJA–01

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

DI–601

795

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 ”ON” button of the OBD II scan tool or the hand–held tester.

(f)

When you use the hand–held tester:
Select the item ”DIAGNOSIS / ENHANCED OBD II / DATA LIST”.

(g)

According to the display on the tester, read the ”DATA LIST”.
Standard:

Item

Measurement Item/

Range (display)

Normal Condition

Stop Light Switch

Stop 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 ”Normal Condition” are reference conditions. Do not
depend solely on these reference conditions when deciding whether a part is faulty or not.
OK:

Brake Pedal Condition

Specified Condition

Depressed

ON

Released

OFF

NG

Go to step 2.

OK

Go to step 3.

I21525

Free

Pushed in

D14167

ECM:

E8

E7

E6

E5

E4

STP(+)

DI–602

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

796

2

Inspect stop light switch.

PREPARATION:
Remove the stop lamp switch assy.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Switch position

Tester Connection

Specified Condition

Switch pin free

1 – 4

Below 1 

Ω

Switch pin pushed in

↑

10 k

Ω

 or higher

Switch pin free

2 – 3

10 k

Ω

 or higher

Switch pin pushed in

↑

Below 1 

Ω

NG

Replace stop light switch (See page 

BR–8

).

OK

3

Check harness and connector (ECM – stop light switch).

PREPARATION:
Install the stop lamp switch assy.
CHECK:
Measure the voltage according to the value(s) in the table be-
low when the brake pedal is depressed and released.
OK:

Condition

Tester Connection

Specified Condition

Brake pedal is depressed

E4 – 15 (STP) – 

Body ground

10 to 14 V

Brake pedal is released

↑

Below 1 V

NG

Repair or replace the harness or connector
(See page 

IN–35

).

OK

Replace the ECM (See page 

SF–80

).