2001 TOYOTA SEQUOIA sensor

A23648
GND 1V/ DIV KNK1 Signal Waveform
1 msec./ Division
A23649
200 msec./DIV 5 V/DIV
GroundA
B
A23650
20 msec./DIV 2 V/DIV
(a) Ground CH1
(b) Ground CH2
(c) Ground CH3
± DIAGNOSTICSENGINE
DI±37
231 Author: Date:
2005 SEQUOIA (RM1146U)
WAVEFORM 2
Knock sensor
ECM Terminal NameBetween KNK1 and EKNK
Between KNK2 and EKN2
Tester Range1 V/DIV, 1 msec./DIV
ConditionMaintain engine RPM at 2,000 rpm after engine warmed±up
HINT:

The wavelength becomes shorter as engine rpm in-
creases.

The waveforms and amplitudes displayed differ slightly
depending on the vehicle.
WAVEFORM 3
VVT OCV
ECM Terminal NameBetween OC1+ and OC1±
Between OC2+ and OC2±
Tester Range0.2 V/DIV, 200 msec./DIV
ConditionAccelerate slowly after engine warmed±up
HINT:
In the DATA LIST, the items VVT OCV DUTY B1 and B2 show
the duty ratio of voltage flowing to the OCV (see illustration on
left).
VVT OCV DUTY B1, B2 = A/B x 100 (%)
WAVEFORM 4
(a) VVT sensor bank 1
(b) VVT sensor bank 2
(c) Crankshaft position sensor
ECM Terminal Name
(a) Between VV1+ and VV1±
(b) Between VV2+ and VV2±
(c) Between NE+ and NE±
Tester Range2 V/DIV, 20 msec./DIV
ConditionIdle after engine warmed±up
HINT:
The wavelength becomes shorter as the engine rpm increases.

A23651
20 msec./DIV 5 V/DIV
(a)
(b)
Ground
Ground
A23652
10 msec./DIV 1 V/DIV
Ground
A23653
1 msec./DIV 5 V/DIV
Ground
A23654
1 msec./DIV 5 V/DIV
Ground
A23655
(a)
(b)
20 msec./DIV 2 V/DIV
Ground
Ground
DI±38
± DIAGNOSTICSENGINE
232 Author: Date:
2005 SEQUOIA (RM1146U)
WAVEFORM 5
(a) Camshaft position sensor
(b) Crankshaft position sensor
ECM Terminal Name(a) Between G2+ and G2±
(b) Between NE+ and NE±
Tester Range5 V/DIV, 20 msec./DIV
ConditionIdle after engine warmed±up
HINT:
The wavelength becomes shorter as the engine rpm increases.
WAVEFORM 6
Vehicle speed signal
ECM Terminal NameBetween SP2+ and SP2±
Tester Range5 V/DIV, 10 msec./DIV
ConditionDriving by 40 km/h (25 mph)
HINT:
The wavelength becomes shorter as vehicle speed increases.
WAVEFORM 7
Throttle actuator positive terminal
ECM Terminal NameBetween M+ and ME01
Tester Range5 V/DIV, 1 msec./DIV
ConditionIdle after engine warmed±up
HINT:
The duty ratio varies depending on the throttle opening opera-
tion.
WAVEFORM 8
Throttle actuator negative terminal
ECM Terminal NameBetween M± and ME01
Tester Range5 V/DIV, 1 msec./DIV
ConditionIdle after engine warmed±up
HINT:
The duty ratio varies depending on the throttle opening opera-
tion.
WAVEFORM 9
(a) Igniter IGT signal (from ECM to igniter)
(b) Igniter IGF signal (from igniter to ECM)
ECM Terminal Name(a) Between IGT1 (to IGT8) and E1
(b) Between IGF1 (IGF2) and E1
Tester Range2 V/DIV, 20 msec./DIV
ConditionIdling
HINT:
The wavelength becomes shorter as vehicle speed increases.

A23656
0.2 V/DIV
200 msec./DIV
Ground
A2365710 msec./DIV 5 V/DIV
Ground
± DIAGNOSTICSENGINE
DI±39
233 Author: Date:
2005 SEQUOIA (RM1146U)
WAVEFORM 10
Heated oxygen sensor
ECM Terminal NamesBetween OX1B and E2
Tester Ranges0.2 V/DIV, 200 msec./DIV
ConditionsEngine speed maintained 2,500 rpm for 2 minutes after
warming up sensor
HINT:
In the DATA LIST, item O2S B1S2 shows the ECM input values
from the heated oxygen sensor.
WAVEFORM 11
Engine speed signal
ECM Terminal NamesBetween TACH and E1
Tester Ranges5 V/DIV, 10 msec./DIV
ConditionsIdling
HINT:
The wavelength becomes shorter as vehicle speed increases.

± DIAGNOSTICSENGINE
DI±47
241 Author: Date:
2005 SEQUOIA (RM1146U)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.
ºPassº 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 P1444Restrict the throttle opening angle: Ga
50 g/s
P1441
P1444Restrict 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
± DIAGNOSTICSENGINE
242 Author: Date:
2005 SEQUOIA (RM1146U)
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 DisplayMeasurement 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 LOADCalculated load by ECM:
Min.: 0 %, Max.: 100 %
11 to 21 %: Idling

12 to 22 %: Running without load
(2,500 rpm)
'
VEHICLE LOADVehicle load:
Min.: 0 %, Max.: 25700 %Actual vehicle load'
MAFAir flow rate from MAF meter:
Min.: 0 g/s, Max.: 655 g/s2.0 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 SPDEngine speed:
Min.: 0 rpm, Max.: 16,383 rpm600
50 rpm: Idling'
VEHICLE SPDVehicle speed:
Min.: 0 km/h, Max.: 255 km/hActual vehicle speedSpeed indicated on speedometer
COOLANT TEMPEngine coolant temperature:
Min.: ±40C, Max.: 140C80 to 100°C
(176 to 212°F): After warming up

If the value ±40C (±40F): sen-
sor circuit open

If the value 140C (284F): sen-
sor circuit shorted
INTAKE AIRIntake air temperature:
Min.: ±40C, Max.: 140CEquivalent to ambient air tempera-
ture

If the value ±40C (±40F): sen-
sor circuit open

If the value 140C (284F): sen-
sor circuit shorted
SECONDARY AIRSecond air system status:
ON or OFFON: Secondary air system opera-
tion'
AIR±FUEL RATIOAir±fuel ratio:
Min.: 0, Max.: 1.9990.8 to 1.2: During idling'
EVAP VAPOR PRESEVAP vapor pressure:
Min.: ±8192 Pa, Max.: 8191 Pa0 Pa: Fuel tank cap removed'

± DIAGNOSTICSENGINE
DI±49
243 Author: Date:
2005 SEQUOIA (RM1146U)PURGE DENSITY
Learning value of purge density/
Min.: ±50, Max.: 350Idling: ±40 to 0 %Service data
PURGE FLOWPurge flow:
Min.: 0 %, Max.: 102.4 %0 to 100 %: Idling'
EVAP PURGE VSVEVAP (Purge) VSV control duty:
Min.: 0 %, Max.: 100 %0 to 100 %: During idlingOrder signal from ECM
VAPOR PRESSVapor pressure:
Min.: ±4.125 kPa, Max.: 2.125 kPa0 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 CA0 to 22 CA:
Driving, 44 mph (70 km/h)Service data
KNOCK FB VALFeedback 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 #2Absolute 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 #1APP sensor No. 1 voltage:
Min.: 0 V, Max.: 4.98 V'ETCS freeze data
ACCEL POS #2APP sensor No. 2 voltage:
Min.: 0 V, Max.: 4.98 V'ETCS freeze data
ACCEL POS #1APP 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 #2APP 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
± DIAGNOSTICSENGINE
244 Author: Date:
2005 SEQUOIA (RM1146U)ST1
Starter signal:
ON or OFFON: Cranking'
SYSGUARD JUDGESystem guard:
ON or OFF'ETCS service data
OPN MALFUNCTIONOpen side malfunction:
ON or OFF'ETCS service data
THROTTLE POSAbsolute throttle position sensor:
Min.: 0 %, Max.: 100 %
10 to 24 %: Throttle fully closed

64 to 96 %: Throttle fully openRead 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 POSThrottle requirement position:
Min.: 0 V, Max.: 5 V0.5 to 1.0 V: Idling'
THROTTLE POSThrottle sensor positioning:
Min.: 0 %, Max.: 100 %10 to 18 %: IdlingCalculated value based on VTA1
THROTTLE POS #2Throttle 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 #1Throttle 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 #2Throttle 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 openRead the value with intrusive op-
eration (active test)
THRTL COMND VALThrottle position command value:
Min.: 0 V, Max.: 4.98 V0.5 to 4.8 VETCS service data
THROTTLE SSR #1
Throttle sensor opener position
No. 1:
Min.: 0 V, Max.: 4.98 V
0.6 to 0.9 VETCS service data
THROTTLE SSR #2
Throttle sensor opener position
No. 2:
Min.: 0 V, Max.: 4.98 V
2.2 to 2.6 VETCS 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 VETCS service data
THROTTLE MOT
Whether or not throttle motor con-
trol permitted:
ON or OFF
ON: IdlingRead the value with the power
switch ON (Do not start engine)
THROTTLE MOTThrottle motor current:
Min.: 0 A, Max.: 80 A0 to 3.0 A: Idling'
THROTTLE MOTThrottle motor:
Min.: 0 %, Max.: 100 %0.5 to 40 %: Idling'
THROTTLE MOTThrottle motor current:
Min.: 0 A, Max.: 19.92 A0 to 3.0 A: Idling'
THROTL OPN DUTYThrottle motor opening duty ratio:
Min.: 0 %, Max.: 100 %0 to 40 %: During idlingWhen accelerator pedal de-
pressed, duty ratio increased
THROTL CLS DUTYThrottle motor closed duty ratio:
Min.: 0 %, Max.: 100 %0 to 40 %: During idlingWhen accelerator pedal released
quickly, duty ratio increased
THRTL MOT (OPN)Throttle motor duty ratio (open):
Min.: 0 %, Max.: 100 %'ETCS service data

± DIAGNOSTICSENGINE
DI±51
245 Author: Date:
2005 SEQUOIA (RM1146U)THRTL MOT (CLS)
Throttle motor duty ratio (close):
Min.: 0 %, Max.: 100 %'ETCS service data
O2S B1 S2
Heated oxygen sensor output volt-
age for bank 1 sensor 2:
Min.: 0 V, Max.: 1.275 V0.1 to 0.9 V:
Driving 44 mph (70 km/h)
Performing the INJ VOL or A/F
CONTROL function of the ACTIVE
TEST enables the technician to
check voltage output of the sensor
O2S B2 S2
Heated oxygen sensor output volt-
age for bank 1 sensor 2:
Min.: 0 V, Max.: 1.275 V0.1 to 0.9 V:
Driving 44 mph (70 km/h)
Performing the INJ VOL or A/F
CONTROL function of the ACTIVE
TEST enables the technician to
check voltage output of the sensor
AFS B1 S1
A/F sensor output voltage for bank
1 sensor 1:
Min.: 0 V, Max.: 7.999 V
2.8 to 3.8 V: Idling
Performing the INJ VOL or A/F
CONTROL function of the ACTIVE
TEST enables the technician to
check voltage output of the sensor
AFS B2 S1
A/F sensor output voltage for bank
1 sensor 1:
Min.: 0 V, Max.: 7.999 V
2.8 to 3.8 V: Idling
Performing the INJ VOL or A/F
CONTROL function of the ACTIVE
TEST enables the technician to
check voltage output of the sensor
TOTAL FT #1
Total fuel trim of bank 1
Average value for fuel trim system
of bank 1:
Min.: ±0.5, Max.: 1,496
±0.2 to 0.2: Idling'
TOTAL FT #2
Total fuel trim of bank 1
Average value for fuel trim system
of bank 1:
Min.: ±0.5, Max.: 1,496
±0.2 to 0.2: Idling'
SHORT FT #1Short±term fuel trim of bank 1:
Min.: ±100 %, Max.: 99.2%0 ± 20 %
This item the short±term fuel com-
pensation used to maintain the
air±fuel ratio at stoichiometric air±
fuel ratio
SHORT FT #2Short±term fuel trim of bank 1:
Min.: ±100 %, Max.: 99.2%0 ± 20 %
This item the short±term fuel com-
pensation used to maintain the
air±fuel ratio at stoichiometric air±
fuel ratio
LONG FT #1Long±term fuel trim of bank 1:
Min.: ±100 %, Max.: 99.2 %0 ± 20 %
This item the overall fuel com-
pensation carried out in long±term
to compensate a continual devi-
ation of the short±term fuel trim
from the central value
LONG FT #2Long±term fuel trim of bank 1:
Min.: ±100 %, Max.: 99.2 %0 ± 20 %
This item the overall fuel com-
pensation carried out in long±term
to compensate a continual devi-
ation of the short±term fuel trim
from the central value
FUEL SYS #1
Fuel system status (Bank1):
OL or CL or OL DRIVE or
OL FAULT or CL FAULT
CL: Idling after warming up

OL (Open Loop): Has not yet sa-
tisfied conditions to go closed
loop

CL (Closed Loop): Using heated
oxygen sensor as feedback for
fuel control.

OL DRIVE: Open loop due to
driving conditions (fuel enrich-
ment)

OL FAULT: Open loop due to de-
tected system fault

CL FAULT: Closed loop but
heated oxygen sensor, which
used for fuel control malfunction-
ing