2001 TOYOTA SEQUOIA check engine

DID7Z±01
D13872
Hand±Held Tester
DLC3CAN VIM
BR3904
0.13 sec.0.13 sec.
ON
OFF DI±44
± DIAGNOSTICSENGINE
238 Author: Date:
2005 SEQUOIA (RM1146U)
CHECK MODE PROCEDURE
HINT:
Hand±held tester only:
Check mode has a higher sensitivity to detect malfunctions and
can detect malfunctions that normal mode cannot detect.
Check mode can also detect all the malfunctions that normal
mode can detect.
1. CHECK MODE PROCEDURE
(a) Make sure that the items below are true.
(1) Battery positive voltage 11 V or more
(2) Throttle valve fully closed
(3) Transmission in the P or N position
(4) A/C switched OFF
(b) Turn the ignition switch OFF.
(c) Connect the hand±held tester to the DLC3.
(d) Turn the ignition switch ON.
(e) Change the ECM to check mode with the hand±held tes-
ter. Enter the following menus: DIAGNOSIS / EN-
HANCED OBD II / CHECK MODE. Make sure the MIL
flashes as shown in the illustration.
NOTICE:
All DTCs and freeze frame data recorded will be erased if:
1) the hand±held tester is used to change the ECM from
normal mode to check mode or vice±versa; or 2) during
check mode, the ignition switch is turned from ON to ACC
or OFF.
(f) Start the engine. The MIL should turn off after the engine
starts.
(g) Simulate the conditions of the malfunction described by
the customer.
(h) After simulating the malfunction conditions, use the
hand±held tester diagnosis selector to check the DTC,
freeze frame data and other data.
(i) After checking the DTC, inspect the applicable circuit.
2. CLEAR DTC (Using the hand±held tester)
(a) Connect the OBD ll scan tool or the hand±held tester to
the DLC3.
(b) Turn the ignition switch ON.
(c) Erase DTCs and freeze frame data with the OBD II scan
tool (complying with SAE J1978) or the hand±held tester.
For the hand±held tester: 1) enter the following menus:
DIAGNOSIS / ENHANCED OBD II / DTC INFO / CLEAR
CODES; and 2) press YES. For the OBD II scan tool, see
its instruction manual.

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±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

DI±54
± DIAGNOSTICSENGINE
248 Author: Date:
2005 SEQUOIA (RM1146U)FC TAU
Fuel cut TAU: Fuel cut during very
light load:
ON or OFF
ON: Fuel cut operating
The fuel cut being performed un-
der very light load to prevent the
engine combustion from becoming
incomplete
IGNITIONIgnition counter:
Min.: 0, Max.: 8000 to 800'
CYL #1, #2, #3, #4, #5, #6, #7, #8Misfire ratio of the cylinder 1 to 4:
Min.: 0, Max.: 2550 %This item displayed in only idling
CYL ALLAll cylinders misfire rate:
Min.: 0, Max.: 2550 to 35'
MISFIRE RPMEngine RPM for first misfire range:
Min.: 0 rpm, Max.: 6,375 rpm0 rpm: Misfire 0'
MISFIRE LOADEngine load for first misfire range:
Min.: 0 g/rev, Max.: 3.98 g/rev0 g/rev: Misfire 0'
MISFIRE MARGINMisfire monitoring:
MIn.: ±100 %, Max.: 99.22 %±100 to 99.2 %Misfire detecting margin
#CODES#Codes:
Min.: 0, Max.: 255'Number of detected DTCs
CHECK MODECheck mode:
0: ON, 1: OFFON: Check mode ONSee page DI±44
SPD TEST
Check mode result for vehicle
speed sensor:
0: COMPL, 1: INCOMPL
''
AS TEST
Check mode result for secondary
air injection system:
0: COMPL, 1: INCOMPL
''
MISFIRE TEST
Check mode result for misfire
monitor:
0: COMPL, 1: INCOMPL
''
OXS1 TEST
Check mode result for HO2 sen-
sor :
0: COMPL, 1: INCOMPL
''
OXS2 TEST
Check mode result for HO2 sen-
sor :
0: COMPL, 1: INCOMPL
''
A/F SSR TEST B1
Check mode result for air±fuel ra-
tio sensor :
0: COMPL, 1: INCOMPL
''
A/F SSR TEST B2
Check mode result for air±fuel ra-
tio sensor :
0: COMPL, 1: INCOMPL
''
MILMIL status:
ON or OFFON: MIL ON'
MIL ON RUN DIST
MIL ON Run Distance:
Min.: 0 second,
Max.: 65,535 seconds
Distance after DTC detected'
MIL ON RUN TIME
Running time from MIL ON:
Min.: 0 minute,
Max.: 65,535 minutesEquivalent to running time after
MIL was ON'
ENG RUN TIME
Engine run time:
Min.: 0 second,
Max.: 65,535 seconds
Time after engine startService data
TIME DTC CLEAR
Time after DTC cleared:
Min.: 0 minute,
Max.: 65,535 minutesEquivalent to time after DTCs
were erased'

± DIAGNOSTICSENGINE
DI±55
249 Author: Date:
2005 SEQUOIA (RM1146U)DIST DTC CLEAR
Distance after DTC cleared:
Min.: 0 km/h, Max.: 65535 km/hEquivalent to drive distance after
DTCs were erased'
WU CYC DTC CLEARWarm±up cycle after DTC cleared:
Min.: 0, Max.: 255'Number of warm±up cycles after
DTC cleared
MODEL CODEModel code:'Identifying the model code:
UCK30 (2WD), UCK40 (4WD)
ENGINE TYPEEngine type:'Identifying the engine type:
2UZFE
CYLINDER NUMBERCylinder number:
Min.: 0, Max.: 255'Identifying the cylinder number:
8
TRANSMISSIONTransmission type:'Identifying the transmission type:
ECT(5AT)
DESTINATIONDestination'Identifying the destination:
A (America)
MODEL YEARModel year:
Min.: 0, Max.: 255'Identifying the model year:
200#
SYSTEMSystem identification'Identifying the engine system:
GASLIN (gasoline engine)
AI STATUSAI operation prohibit:
OK or NGOK
*1: If no idling conditions are specified, the transmission gear selector lever should be in the N or P position,
and the A/C switch and all accessory switches should be OFF.
2. ACTIVE TEST
HINT:
Performing an ACTIVE TEST enables components including the relays, VSV (Vacuum Switching Valve),
and actuators, to be operated without removing any parts. The ACTIVE TEST can be performed with a
hand±held tester. Performing an ACTIVE TEST as the first step of troubleshooting is one method of shorten-
ing diagnostic time.
DATA LIST can be displayed during ACTIVE TESTs.
(a) Connect a hand±held tester to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the tester ON.
(d) Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST.
(e) Perform the ACTIVE TEST by referring to the table below.
Hand±held Tester DisplaysTest DetailsControl RangesDiagnostic Notes
INJ VOLChange injection volumeBetween ±12 % and 25 %

All injectors tested at the same
time

Perform test at less than 3,000
rpm

Injection volume can be changed
in 1 % graduations within control
range
A/F CONTROLChange injection volumeLower by 12.5 % or increase by 25
%

Perform test at less than 3,000
rpm

A/F CONTROL enables checking
and graphing of A/F (Air Fuel Ra-
tio) sensor and Heated Oxygen
(HO2) sensor voltage outputs

To conduct test, select following
menu items: ACTIVE TEST / A/F
CONTROL / USER DATA / AFS
B1S1 and O2S B1S2, and press
YES and ENTER followed by F4
EVAP VSV (ALONE)Activate EVAP VSV controlON/OFF±

± DIAGNOSTICSENGINE
DI±57
251 Author: Date:
2005 SEQUOIA (RM1146U)
3. SYSTEM CHECK
HINT:
Performing a SYSTEM CHECK enables the system, which consists of multiple actuators, to be operated
without removing any parts. In addition, it can show whether or not any DTCs are set, and can detect poten-
tial malfunctions in the system. The SYSTEM CHECK can be performed with a hand±held tester.
(a) Connect a hand±held tester to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the tester ON.
(d) Select the following menu items: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK.
(e) Perform the SYSTEM CHECK by referring to the table below.
Hand±held Tester DisplaysTest DetailsRecommended Fuel TemperaturesDiagnostic Notes
EVAP SYS CHECK
(AUTO OPERATION)Perform 5 steps in order to oper-
ate EVAP key±off monitor auto-
matically
35C (95F) or less

If no DTCs in PENDING CODE
after performing this test, system
functioning normally

Refer to EVAP Inspection Proce-
dure on page DI±460
EVAP SYS CHECK
(MANUAL OPERATION)Perform 5 steps in order to oper-
ate EVAP key±off monitor manual-
ly
35C (95F) or less

Used to detect malfunctioning
parts

Refer to EVAP Inspection Proce-
dure on page DI±460
AI INJ CHECK
(AUTO OPERATION)Perform 6 steps in order to oper-
ate air injection system automati-
cally
±

If no DTCs in PENDING CODE
after performing this test, system
functioning normally
AI INJ CHECK
(MANUAL OPERATION)Perform 8 operations in order to
operate air injection system moni-
tor manually
±
Used to detect malfunctioning
parts

DI3HB±12
DI±58
± DIAGNOSTICSENGINE
252 Author: Date:
2005 SEQUOIA (RM1146U)
DIAGNOSTIC TROUBLE CODE CHART
HINT:
Parameters listed in the chart may not be exactly the same as your reading due to the type of instrument
or other factors.
If a malfunction code is displayed during the DTC check in check mode, check the circuit for the codes listed
in the table below. For details of each code, refer to the ºSee pageº under the respective ''DTC No.'' in the
DTC chart.
DTC No.
(See page)Detection ItemTrouble AreaMIL*1Memory
P0010
(DI±73)Camshaft Position ºAº Actuator
Circuit (Bank 1)
Open or short in OCV circuit

OCV

ECM

P0011
(DI±79)Camshaft Position ºAº ±Timing
Over± Advanced or System Per-
formance (Bank 1)
Valve timing

OCV

VVT controller assembly

ECM

P0012
(DI±79)Camshaft Position ºAº ±Timing
Over± Retarded (Bank 1)

Valve timing

OCV

VVT controller assembly

ECM

P0016
(DI±85)Crankshaft Position ± Camshaft
Position Correlation (Bank 1
Sensor A)
Open or short in VVT sensor circuit

VVT sensor

ECM

P0018
(DI±85)Crankshaft Position ± Camshaft
Position Correlation (Bank 2
Sensor A)
Open or short in VVT sensor circuit

VVT sensor

ECM

P0020
(DI±73)Camshaft Position ºAº Actuator
Circuit (Bank 2)
Open or short in OCV circuit

OCV

ECM

P0021
(DI±79)Camshaft Position ºAº ±Timing
Over± Advanced or System Per-
formance (Bank 2)
Valve timing

OCV

VVT controller assembly

ECM

P0022
(DI±79)Camshaft Position ºAº ±Timing
Over± Retarded (Bank 2)

Valve timing

OCV

VVT controller assembly

ECM

P0031
(DI±88)Oxygen (A/F) Sensor Heater
Control Circuit Low (Bank 1 Sen-
sor 1)
Open in heater circuit of A/F sensor

A/F sensor heater

A/F relay

ECM

P0032
(DI±88)Oxygen (A/F) Sensor Heater
Control Circuit High (Bank 1
Sensor 1)
Short in heater circuit of A/F sensor

A/F sensor heater

A/F relay

ECM

P0037
(DI±93)Oxygen Sensor Heater Control
Circuit Low (Bank 1 Sensor 2)

Open in heater circuit of heated oxygen sensor

Heated oxygen sensor heater

EFI relay

ECM

P0038
(DI±93)Oxygen Sensor Heater Control
Circuit High (Bank 1 Sensor 2)

Short in heater circuit of heated oxygen sensor

Heated oxygen sensor heater

EFI relay

ECM


± DIAGNOSTICSENGINE
DI±71
265 Author: Date:
2005 SEQUOIA (RM1146U)P2401
(DI±410)
Evaporative Emission System
Leak Detection Pump Control
Circuit Low
Pump module

Connector/Wire harness (between pump module and ECM)

ECM

P2402
(DI±410)Evaporative Emission System
Leak Detection Pump Control
Circuit High
Pump module

Connector/Wire harness (between pump module and ECM)

ECM

P2419
(DI±416)Evaporate Emission System
Switching Valve Control Circuit
Low
Pump module

Connector/Wire harness (between pump module and ECM)

ECM

P2420
(DI±416)Evaporate Emission System
Switching Valve Control Circuit
High
Pump module

Connector/Wire harness (between pump module and ECM)

ECM

P2430
(DI±422)Secondary Air Injection System
Air Flow/Pressure Sensor Circuit
Bank 1

Pressure sensor

Open or short in pressure sensor circuit

Vacuum hose

Check valve

ECM

P2431
(DI±422)Secondary Air Injection System
Air Flow/Pressure Sensor Circuit
Range/Performance Bank 1

Pressure sensor

Open or short in pressure sensor circuit

Vacuum hose

Check valve

ECM

P2432
(DI±422)Secondary Air Injection System
Air Flow/Pressure Sensor Circuit
Low Bank 1

Pressure sensor

Open or short in pressure sensor circuit

Vacuum hose

Check valve

ECM

P2433
(DI±422)Secondary Air Injection System
Air Flow/Pressure Sensor Circuit
High Bank 1

Pressure sensor

Open or short in pressure sensor circuit

Vacuum hose

Check valve

ECM

P2440
(DI±314)Secondary Air Injection System
Switching Valve Stuck Open
Bank 1

Electromagnetic air switching valve

Air switching valve No.2 (Bank 1 and/or 2)

VSV for air injection system (Bank 1 and/or 2)

Air injection driver

Air injection driver circuit

ECM

P2441
(DI±330)Secondary Air Injection System
Switching Valve Stuck Close
Bank 1

Vacuum hoses (Throttle body ± VSVs for air injection control)

Electromagnetic air switching valve

Air injector pipe (Air switching valve No.2 ± exhaust manifold)

Air injection hose

Air switching valve No.2 (Bank 1 and/or 2)

VSV for air injection control (Bank 1 and/or 2)

Air injection driver

Air injection driver circuit

ECM

P2444
(DI±426)Secondary Air Injection System
Pump Stuck On Bank 1

Short in air pump circuit

Pressure sensor

Air pump assembly

Open or short in pressure sensor circuit

ECM