2001 TOYOTA SEQUOIA fuel pressure

DID7O±02
± DIAGNOSTICSENGINE
DI±3
197 Author: Date:
2005 SEQUOIA (RM1146U)
TOYOTA PART AND SYSTEM NAME LIST
This reference list indicates the part names used in this manual along with their definitions.
TOYOTA/LEXUS nameDefinition
Toyota HCAC system, Hydro±carbon Adsorptive Catalyst
(HCAC) system, HC adsorptive three±way catalystHC adsorptive three±way catalytic converter
Variable Valve Timing sensor, VVT sensorCamshaft position sensor
Variable valve timing system, VVT systemCamshaft timing control system
Camshaft timing oil control valve, Oil control valve, OCV,
VVT, VSVCamshaft timing oil control valve
Variable timing and lift, VVTLCamshaft timing and lift control
Crankshaft position sensor ºAºCrankshaft position sensor
Engine speed sensorCrankshaft position sensor
THAIntake air temperature
Knock control moduleEngine knock control module
Knock sensorEngine knock sensor
Mass or volume air flow circuitMass air flow sensor circuit
Vacuum sensorManifold air pressure sensor
Internal control module, Control module, Engine control
ECU, PCMPower train control module
FC idleDeceleration fuel cut
Idle air control valveIdle speed control
VSV for CCV, Canister close valve VSV for canister controlEvaporative emissions canister vent valve
VSV for EVAP, Vacuum switching valve assembly No. 1,
EVAP VSV, Purge VSVEvaporative emissions canister purge valve
VSV for pressure switching valve, Bypass VSVEvaporative emission pressure switching valve
Vapor pressure sensor, EVAP pressure sensor, Evaporative
emission control system pressure sensorFuel tank pressure sensor
Charcoal canisterEvaporative emissions canister
ORVR systemOn±board refueling vapor recovery system
Intake manifold runner controlIntake manifold tuning system
Intake manifold runner valve, IMRV, IACV (runner valve)Intake manifold tuning valve
Intake control VSVIntake manifold tuning solenoid valve
AFSAir fuel ratio sensor
O2 sensorHeater oxygen sensor
Oxygen sensor pumping current circuitOxygen sensor output signal
Oxygen sensor reference ground circuitOxygen sensor signal ground
Accel position sensorAccelerator pedal position sensor
Throttle actuator control motor, Actuator control motor, Elec-
tronic throttle motor, Throttle control motorElectronic throttle actuator
Electronic throttle control system, Throttle actuator control
systemElectronic throttle control system
Throttle/pedal position sensor, Throttle/pedal position switch,
Throttle position sensor/switchThrottle position sensor
Turbo press sensorTurbocharger pressure sensor
Turbo VSVTurbocharger pressure control solenoid valve
P/S pressure switchPower±steering pressure switch
VSV for ACMActive control engine mount

B17430
HA1A
A1A+
A1A±
HA2A
A2A+
A2A±
HT1B
OXIB
HT2B
OX2B
E2
PRG
ACIS
AIV1
AIV2
THA
E2G
VG
E2
THW
PPMP
VPMP
MPMP#10
#20
#30
#40
#50
#60
#70
#80
IGT1
IGT2
IGT3
IGT4
IGT5
IGT6
IGT7
IGT8
IGF1
IGF2 To A/F Relay
A/F Sensor
(Bank 1 Sensor 1)
A/F Sensor
(Bank 2 Sensor 1)
HO2 Sensor
(Bank 1 Sensor 2)
HO2 Sensor
(Bank 2 Sensor 2) To EFI Relay
To EFI No.2
Fuse
VSV (EVAP)
VSV (ACIS)
VSV (AI Control)
VSV (AI Control)
Mass Air Flow
Meter
ETC Sensor
Pump Modul
Pressure
Sensor
Control
Valve To VC
TerminalTo Battery
IGN2
Fuel Injector #1
Fuel Injector #2
Fuel Injector #3
Fuel Injector #4
Fuel Injector #5
Fuel Injector #6
Fuel Injector #7
Fuel Injector #8
Ignition Coil and
Igniter No.1
Ignition Coil and
Igniter No.2
Ignition Coil and
Igniter No.3
Ignition Coil and
Igniter No.4
Ignition Coil and
Igniter No.5
Ignition Coil and
Igniter No.6
Ignition Coil and
Igniter No.7
Ignition Coil and
Igniter No.8
± DIAGNOSTICSENGINE
DI±7
201 Author: Date:
2005 SEQUOIA (RM1146U)

B17431
AIDI
AIRP
AIRV
AIP
GE01
M+
M±
VTA1
VC
VTA2
FC
FPRACCR
ST1±
STP
E01
E02
E04
E05
E1
E03
ME01
EC
EOM
TC
CANL
CANH
IMI
IMODLC3
CG
TC
CANL
CANH ASVAI Driver To EFI Relay
To Battery
To Battery
To Battery To E2
TerminalTo E2
TerminalTo IG SW
Air Pump
Pressure
Sensor
Throttle Body
C/OPN Relay
Fuel Pump Relay
Fuel Pump Resister
Fuel PumpTransponder Key
Computre Stop Light SW
To IGN1 Fuse
To EFI
RelayACC Cut Relay
To Battery DI±8
± DIAGNOSTICSENGINE
202 Author: Date:
2005 SEQUOIA (RM1146U)

± DIAGNOSTICSENGINE
DI±13
207 Author: Date:
2005 SEQUOIA (RM1146U)
4 Check air filter.
PREPARATION:
Remove the air filter.
CHECK:
Visual check that the air filter is not excessively dirty or oily.
NG Repair or replace
air filter.
OK
5 Check idle speed (See page EM±11).
NG Proceed to problem symptoms table on page
DI±33.
OK
6 Check fuel pressure (See page SF±7).
NG Proceed to page SF±7 and continue to trouble-
shoot.
OK
7 Check for spark (See page IG±1).
NG Proceed to page IG±1 and continue to trouble-
shoot.
OK
Proceed to problem symptoms table on page
DI±33.

A18910
Idling
Ignition OFF
Warmed up Soak 15 to 50 min.
(When the readiness code or diagnostic code
is set, this test is completed.) 3,000 rpm
10 sec.
± DIAGNOSTICSENGINE
DI±29
223 Author: Date:
2005 SEQUOIA (RM1146U)
3. EVAP MONITOR (VACUUM PRESSURE MONITOR)
NOTICE:
A cold soak must be performed prior to conducting the drive pattern to complete the Internal Pres-
sure Readiness Monitor.
(a) Cold Soak Preconditions
The monitor will not run unless:

MIL is OFF

Fuel level is approximately 1/2 to 3/4

Altitude is 7,800 feet (2,400 m) or less
(b) Cold Soak Procedure
Let the vehicle cold soak for 8 hours or until the difference between IAT and ECT becomes less than
7°C (13°F)
HINT:
Examples:

Scenario 1
ECT = 24°C (75°F)
IAT = 16°C (60°F)
Difference between ECT and IAT is 8°C (15°F)
" The monitor will not run because difference between ECT and IAT is greater than 7°C (13°F)

Scenario 2
ECT = 21°C (70°F)
IAT = 20°C (68°F)
Difference between ECT and IAT is 1°C (2°F)
" The monitor will run because difference between ECT and IAT is less than 7°C (13°F)
4. EVAP MONITOR (VACUUM PRESSURE MONITOR) (CONTINUED)

DI±30
± DIAGNOSTICSENGINE
224 Author: Date:
2005 SEQUOIA (RM1146U)
(a) Preconditions
The monitor will not run unless:

MIL is OFF

Fuel level is approximately 1/2 to 3/4

Altitude is 7,800 feet (2,400 m) or less

Engine Coolant Temperature (ECT) is between 4.4°C and 35°C (40°F and 95°F)

Intake Air Temperature (IAT) is between 4.4°C and 35°C (40°F and 95°F)

Cold Soak Procedure has been completed

Before starting the engine, the difference between ECT and IAT must be less than 7°C (13°F)
HINT:
Examples:

Scenario 1
ECT = 24°C (75°F)
IAT = 16°C (60°F)
Difference between ECT and IAT is 8°C (15°F)
" The monitor will not run because difference between ECT and IAT is higher than 7°C (13°F)

Scenario 2
ECT = 21°C (70°F)
IAT = 20°C (68°F)
Difference between ECT and IAT is 1°C (2°F)
" The monitor will run because difference between ECT and IAT is less than 7°C (13°F)
The readiness test can be completed in cold ambient conditions (less than 40°F / 4.4°C) and/or at
high altitudes (more than 7,800 feet / 2,400 m) if the drive pattern is repeated a second time after cycl-
ing the ignition off.
(b) Drive Pattern
(1) Connect the OBD II scan tool to DLC3 to check monitor status and preconditions (refer to (a)).
(2) Release pressure in fuel tank by removing the fuel tank cap and then reinstall it.
(3) Start the engine and allow it to idle until ECT becomes 75°C (167°F) or higher.
(4) Run the engine at 3,000 rpm for approximately 10 seconds.
(5) Allow the engine to idle with the A/C ON (to create slight load) for 15 to 50 minutes.
NOTICE:
If the vehicle is not equipped with A/C, put a slight load on the engine by doing the following :

Securely set the parking brake.

Block the drive wheels with wheel chocks.

Allow the vehicle to idle in drive for 15 to 50 minutes.

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'