Toyota Sequoia (2005). Manual - part 61

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DIAGNOSTICS

ENGINE

DI–47

241

P2120

P2121

P2122

P2123

P2125

P2127

P2128

P2138

The accelerator pedal position sensor has two (main and

sub) sensor circuits. If a malfunction occurs in either of the

sensor circuits, the ECM detects the abnormal signal volt-

age difference between the two sensor circuits and

switches to limp mode. In limp mode, the remaining circuit

is used to calculate the accelerator pedal opening to allow

the vehicle to continue driving.

If both circuits malfunction, the ECM regards the opening

angle of the accelerator pedal to be fully closed. In this

case, the throttle valve will remain closed as if the engine is

idling.

”Pass” condition is detected and the ignition switch is turned
OFF.

P2440 and

P1441 and/or

P1444

Restrict the throttle opening angle: Ga 

 30 g/s

P1441 and P1444

Restrict the throttle opening angle: Ga 

 50 g/s

P1441

P1444

Restrict the throttle opening angle: Ga 

 100 g/s

P2430

P2431

P2432

P2433

Restrict the throttle opening angle: Ga 

 50 g/s

DID81–01

DI–48

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DIAGNOSTICS

ENGINE

242

DATA LIST / ACTIVE TEST

1.

DATA LIST

HINT:
By reading the DATA LIST displayed on a hand–held tester, you can check values, including those of the
switches, sensors, and actuators, without removing any parts. Reading the DATA LIST as the first step of
troubleshooting is one method of shortening diagnostic time.
NOTICE:
In the table below, the values listed under Normal Conditions are for reference only. Do not depend
solely on these values when determining whether or not a part is faulty.
(a)

Warm up the engine.

(b)

Turn the ignition switch to OFF.

(c)

Connect a hand–held tester to the DLC3.

(d)

Turn the ignition switch to ON.

(e)

Turn the tester ON.

(f)

Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST.

(g)

Check the values by referring to the table below.

Hand–Held Tester Display

Measurement Item:Range

(Display)

Normal Condition *

Diagnostic Note

INJECTOR

Injection period of the No. 1 cylin-
der: 
Min.: 0 ms, Max.: 32.64 ms

2.3 to 3.8 ms: Idling



IGN ADVANCE

Ignition timing advance for No. 1
cylinder/ 
Min.: –64 deg., Max.: 63.5 deg.

BTDC 4 to

 

17

°: 

Idling



CALC LOAD

Calculated load by ECM: 
Min.: 0 %, Max.: 100 %

11 to 21 %: Idling

12 to 22 %: Running without load
(2,500 rpm)



VEHICLE LOAD

Vehicle load: 
Min.: 0 %, Max.: 25700 %

Actual vehicle load



MAF

Air flow rate from MAF meter: 
Min.: 0 g/s, Max.: 655 g/s

2.0 to 3.9 g/s: Idling

If the value approximately 0.0 g/s:

Mass air flow meter power
source circuit open

VG circuit open or short

If the value 160.0 g/s or more:

E2G circuit open

ENGINE SPD

Engine speed: 
Min.: 0 rpm, Max.: 16,383 rpm

600 

50 rpm: Idling



VEHICLE SPD

Vehicle speed: 
Min.: 0 km/h, Max.: 255 km/h

Actual vehicle speed

Speed indicated on speedometer

COOLANT TEMP

Engine coolant temperature: 
Min.: –40



C, Max.: 140



C

80 to

 

100

°

C 

(176 to 212

°F): 

After warming up

If the value –40



C (–40



F): sen-

sor circuit open

If the value 140



C (284



F): sen-

sor circuit shorted

INTAKE AIR

Intake air temperature: 
Min.: –40



C, Max.: 140



C

Equivalent to ambient air tempera-
ture

If the value –40



C (–40



F): sen-

sor circuit open

If the value 140



C (284



F): sen-

sor circuit shorted

SECONDARY AIR

Second air system status: 
ON or OFF

ON: Secondary air system opera-
tion



AIR–FUEL RATIO

Air–fuel ratio:
Min.: 0, Max.: 1.999

0.8 to 1.2: During idling



EVAP VAPOR PRES

EVAP vapor pressure:
Min.: –8192 Pa, Max.: 8191 Pa

0 Pa: Fuel tank cap removed



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DIAGNOSTICS

ENGINE

DI–49

243

PURGE DENSITY

Learning value of purge density/
Min.: –50, Max.: 350

Idling: –40 to 0 %

Service data

PURGE FLOW

Purge flow:
Min.: 0 %, Max.: 102.4 %

0 to 100 %: Idling



EVAP PURGE VSV

EVAP (Purge) VSV control duty:
Min.: 0 %, Max.: 100 %

0 to 100 %: During idling

Order signal from ECM

VAPOR PRESS

Vapor pressure: 
Min.: –4.125 kPa, Max.: 2.125 kPa

0 kPa: Fuel tank cap removed

Pressure inside fuel tank moni-
tored by the vapor pressure sen-
sor

KNOCK CRRT VAL

Correction learning value of
knocking:
Min.: –64 CA, Max.: 1,984 CA

0 to 22 



CA:

Driving, 44 mph (70 km/h)

Service data

KNOCK FB VAL

Feedback value of knocking:
Min.: –64 CA, Max.: 1,984 CA

–22 to 0 



CA

Driving, 44 mph (70 km/h)

Service data

ACCEL POS #1

Absolute Accelerator Pedal Posi-
tion (APP) No. 1:
Min.: 0 %, Max.: 100 %

10 to 22 %: accelerator pedal is
released
54 to 86 %: accelerator pedal is
fully depressed



ACCEL POS #2

Absolute APP No. 2:
Min.: 0 %, Max.: 100 %

12 to 42 %: accelerator pedal is
released
66 to 98 %: The accelerator pedal
is fully depressed



ACCEL POS #1

APP sensor No. 1 voltage:
Min.: 0 V, Max.: 4.98 V



ETCS freeze data

ACCEL POS #2

APP sensor No. 2 voltage:
Min.: 0 V, Max.: 4.98 V



ETCS freeze data

ACCEL POS #1

APP sensor No. 1 voltage:
Min.: 0 V, Max.: 5 V

0.5 to 1.1 V: accelerator pedal is
released.
2.6 to 4.5 V: or pedal is fully de-
pressed.



ACCEL POS #2

APP sensor No. 2 voltage:
Min.: 0 V, Max.: 5 V

1.2 to 2.0 V: accelerator pedal is
released.
3.4 to 5.3 V:  accelerator pedal is
fully depressed.



ACCEL IDL POS

Whether or not accelerator pedal
position sensor detecting idle: 
ON or OFF

ON: Idling



THRTL LEARN VAL

Throttle valve fully closed 
(learned value):

0.4 to 0.8 V



ACCEL SSR #1 AD

Accelerator fully closed value No.1
(AD):
Min.: 0, Max.: 4.98 V



ETCS service data

ACCEL LRN VAL#1

Accelerator fully closed learning
value No.1:
Min.: 0, Max.: 124.512



ETCS service data

ACCEL LRN VAL#2

Accelerator fully closed learning
value No.2:
Min.: 0, Max.: 124.512



ETCS service data

FAIL #1

Whether or not fail safe function
executed:
ON or OFF

ON: ETCS has failed



FAIL #2

Whether or not fail safe function
executed:
ON or OFF

ON: ETCS has failed



DI–50

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DIAGNOSTICS

ENGINE

244

ST1

Starter signal: 
ON or OFF

ON: Cranking



SYSGUARD JUDGE

System guard:
ON or OFF



ETCS service data

OPN MALFUNCTION

Open side malfunction:
ON or OFF



ETCS service data

THROTTLE POS

Absolute throttle position sensor: 
Min.: 0 %, Max.: 100 %

10 to 24 %: Throttle fully closed

64 to 96 %: Throttle fully open

Read the value with intrusive op-
eration (active test)

THROTTL IDL POS

Whether or not throttle position
sensor detecting idle: 
ON or OFF

ON: Idling



THRTL REQ POS

Throttle requirement position:
Min.: 0 V, Max.: 5 V

0.5 to 1.0 V: Idling



THROTTLE POS

Throttle sensor positioning:
Min.: 0 %, Max.: 100 %

10 to 18 %: Idling

Calculated value based on VTA1

THROTTLE POS #2

Throttle sensor positioning #2:
Min.: 0 %, Max.: 100 %



Calculated value based on VTA2

THROTTLE POS #1

Throttle position sensor No. 1 
output voltage:
Min.: 0 V, Max.: 4.9 V



ETCS freeze data

THROTTLE POS #2

Throttle position sensor No.2 out-
put voltage: 
Min.: 0 V, Max.: 4.9 V



ETCS freeze data

THROTTLE POS #1

Throttle position No. 1:
Min.: 0 V, Max.: 5 V

0.5 to 1.2 V: Throttle fully closed

3.2 to 4.8 V: Throttle fully opened



THROTTLE POS #2

Throttle position No. 2:
Min.: 0 V, Max.: 5 V

2.0 to 2.9 V: Throttle fully closed

4.6 to 5.5 V: Throttle fully open

Read the value with intrusive op-
eration (active test)

THRTL COMND VAL

Throttle position command value:
Min.: 0 V, Max.: 4.98 V

0.5 to 4.8 V

ETCS service data

THROTTLE SSR #1

Throttle sensor opener position
No. 1:
Min.: 0 V, Max.: 4.98 V

0.6 to 0.9 V

ETCS service data

THROTTLE SSR #2

Throttle sensor opener position
No. 2:
Min.: 0 V, Max.: 4.98 V

2.2 to 2.6 V

ETCS service data

THRTL SSR #1 AD

Throttle sensor opener position
No.1 (AD):
Min.: 0 V, Max.: 4.98 V

0.6 to 0.9 V

ETCS service data

THROTTLE MOT

Whether or not throttle motor con-
trol permitted: 
ON or OFF

ON: Idling

Read the value with the power
switch ON (Do not start engine)

THROTTLE MOT

Throttle motor current:
Min.: 0 A, Max.: 80 A

0 to 3.0 A: Idling



THROTTLE MOT

Throttle motor:
Min.: 0 %, Max.: 100 %

0.5 to 40 %: Idling



THROTTLE MOT

Throttle motor current:
Min.: 0 A, Max.: 19.92 A

0 to 3.0 A: Idling



THROTL OPN DUTY

Throttle motor opening duty ratio:
Min.: 0 %, Max.: 100 %

0 to 40 %: During idling

When accelerator pedal de-
pressed, duty ratio increased

THROTL CLS DUTY

Throttle motor closed duty ratio:
Min.: 0 %, Max.: 100 %

0 to 40 %: During idling

When accelerator pedal released
quickly, duty ratio increased

THRTL MOT (OPN)

Throttle motor duty ratio (open):
Min.: 0 %, Max.: 100 %



ETCS service data