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
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