2001 TOYOTA SEQUOIA fuel

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.

A23544
40 mph (64 km/h)
Idling
IG SW OFF ECT:
75C (167F) or higher
Vehicle Speed
Warming up(5)(6)
10 minutes
or more(7)
10 seconds
or more4 seconds
or moreTime At Least 3 times
(8) (9)
(10) Accelerator Pedal
DepressedAccelerator Pedal
Released (Fuel±cut)
± DIAGNOSTICSENGINE
DI±31
225 Author: Date:
2005 SEQUOIA (RM1146U)
5. AIR±FUEL RATIO (A/F) AND OXYGEN SENSOR (HO2) MONITOR (ACTIVE AIR±FUEL RATIO
CONTROL TYPE)
(a) Preconditions
The monitor will not run unless:

2 minutes or more have elapsed since the engine was started.

The Engine Coolant Temperature (ECT) is 75C (167F) or higher.

Air±fuel ratio feedback control is performed.

Fuel±cut control is performed for 8 seconds or more.
(b) Drive Pattern
(1) Connect the hand±held tester to DLC3.
(2) Turn the ignition switch to ON.
(3) Clear DTCs (see page DI±43).
(4) Start the engine, and warm it up until the ECT reaches 75C (167F) or higher.
(5) Drive the vehicle at 40 mph (64 km/h) or more for at least 10 minutes.
(6) Change the transmission to 2nd gear.
(7) Accelerate the vehicle to 30 mph (48 km/h) or more by depressing the accelerator pedal for at
least 10 seconds.
(8) Soon after performing step (8) above, release the accelerator pedal for at least 4 seconds without
depressing the brake pedal, in order to execute fuel±cut control.
(9) Stop the vehicle and allow the engine to idle for 10 seconds or more.
(10) Allow the vehicle to decelerate until the vehicle speed declines to less than 6 mph (10 km/h).
(11) Repeat steps from (8) through (10) above at least 3 times in one driving cycle.
(c) Monitor Status
(1) Check the Readiness Monitor status displayed on the tester.
(2) If the status does not switch to COMPL (complete), make sure that the preconditions have been
met, and then perform steps from (5) through (11) in Drive Pattern above.

DI3HJ±10
± DIAGNOSTICSENGINE
DI±33
227 Author: Date:
2005 SEQUOIA (RM1146U)
PROBLEM SYMPTOMS TABLE
SymptomSuspect AreaSee page
Engine does not crank (Does not start)
22.Starter
23.Starter relay
24.Park/neutral position switchST±15
ST±17
DI±576
No initial combustion (Does not start)
1. ECM power source circuit
2. Fuel pump control circuit
3. Engine control module (ECM)DI±493
DI±509
IN±35
No complete combustion (Does not start)1. Fuel pump control circuitDI±509
Engine cranks normally but difficult to start
1. Starter signal circuit
2. Fuel pump control circuit
3. CompressionDI±298
DI±509
EM±3
Difficult to start with cold engine1. Starter signal circuit
2. Fuel pump control circuitDI±298
DI±509
Difficult to start with hot engine1. Starter signal circuit
2. Fuel pump control circuitDI±298
DI±509
High engine idle speed (Poor idling)1. A/C switch circuit
2. ECM power source circuit±
DI±493
Low engine idle speed (Poor idling)1. A/C switch circuit
2. Fuel pump control circuit±
DI±509
Rough idling (Poor idling)1. Compression
2. Fuel pump control circuitEM±3
DI±509
Hunting (Poor idling)1. ECM power source circuit
2. Fuel pump control circuitDI±493
DI±509
Hesitation/Poor acceleration (Poor driveability)1. Fuel pump control circuit
2. A/T faultyDI±509
±
Surging (Poor driveability)1. Fuel pump control circuitDI±509
Engine stalls soon after starting1. Fuel pump control circuitDI±509
Engine stalls during A/C operation1. A/C switch circuit
2. Engine control module (ECM)±
IN±35
Unable to refuel/Difficult to refuel1. ORVR system±

A2364720 msec./DIV 20 V/DIV
Ground
DI±36
± DIAGNOSTICSENGINE
230 Author: Date:
2005 SEQUOIA (RM1146U) OX2B (E7±33) ± E2 (E8±28)
R ± G±WIdlingPulse generation
(See waveform 10)
STP (E4 15) E1 (E6 1)GY BRBrake pedal is depressed7.5 to 14 VSTP (E4±15) ± E1 (E6±1)G±Y ± BRBrake pedal is releasedBelow 1.5 V
ST1 (E4 16) E1 (E6 1)LB BRBrake pedal is depressedBelow 1.5 VST1± (E4±16) ± E1 (E6±1)L±B ± BRBrake pedal is released7.5 to 14 V
STA (E6±11) ± E1 (E6±1)B±R ± BRShift lever position P or N, Ignition switch START6.0 V or more
STSW (E6±12) ± E1 (E6±1)B ± BRShift lever position P or N, ignition switch START6.0 V or more
STAR/NSW (E7 8) E1 (E6 1)BBRIG switch ON, Other shift position in P, N9 to 14 VSTAR/NSW (E7±8) ± E1 (E6±1)B ± BRIG switch ON, Shift position in P, N0 to 3.0 V
W (E5 30) E1 (E6 1)VW BRIdling9 to 14 VW (E5±30) ± E1 (E6±1)V±W ± BRIG switch ONBelow 3.0 V
TACH (E5±1) ± E1 (E6±1)Y±G ± BRIdlingPulse generation
(See waveform 11)
ACIS (E8±33) ± E1 (E6±1)B±L ± BRIG switch ON9 to 14 V
VPMP (E4±5) ± E1 (E6±1)P±L ± BRIgnition switch ON9 V to 14 V
MPMP (E4±6) ± E1 (E6±1)V±G ± BR
Vacuum pump OFF

Vacuum pump ON0 V to 3 V
9 V to 14 V
PPMP (E4±22) ± E1 (E6±1)R±G ± BRIgnition switch ON3 V to 3.6 V
AIV1 (E8±27) ± E1 (E6±1)L±B ± BRIgnition switch ON9 to 14 V
AIV2 (E8±26) ± E1 (E6±1)P±L ± BRIgnition switch ON9 to 14 V
AIRV (E4±4) ± E1 (E6±1)R±W ± BRIgnition switch ON9 to 14 V
AIRP (E4±25) ± E1 (E6±1)G±W ± BRIgnition switch ON9 to 14 V
AIP (E8±32) ± E1 (E6±1)B±Y ± BRIgnition switch ON3 V to 3.6 V
*1: The ECM terminal voltage is constant regardless of the output voltage from the sensor.
WAVEFORM 1
Fuel injector
ECM Terminal NamesBetween #10 (to 40) and E01
Tester Ranges20 V/DIV, 20 msec./DIV
ConditionsIdling
HINT:
The wavelength becomes shorter as the engine rpm increases.

A04550
12 345678
11 12 13 14 15 16 910
DLC3
± DIAGNOSTICSENGINE
DI±41
235 Author: Date:
2005 SEQUOIA (RM1146U)

Freeze frame data:
The freeze frame data records the engine conditions (fuel
system, calculated load, engine coolant temperature, fuel
trim, engine speed, vehicle speed, etc.) when a malfunc-
tion is detected. When troubleshooting, freeze frame data
can help determine if the vehicle was running or stopped,
if the engine was warmed up or not, if the air±fuel ratio
was lean or rich, as well as other data from the time when
a malfunction occurred.
Priorities for troubleshooting:
When multiple DTCs occur, find out the order in which the DTCs
should be inspected by checking the component's DTC chart.
If no instructions are written in the DTC chart, check DTCs in the
following order of priority:
(a) DTCs other than fuel trim malfunction DTCs (P0171,
P0172, P0174 and P0175) and misfire DTCs (P0300 to
P0308).
(b) Fuel trim malfunction DTCs (P0171, P0172, P0174 and
P0175).
(c) Misfire DTCs (P0300 to P0308).
4. CHECK DLC3
The vehicle's ECM uses the ISO 9141±2 for communica-
tion protocol. The terminal arrangement of the DLC3 com-
plies with SAE J1962 and matches the ISO 9141±2 for-
mat.
SymbolTerminal DescriptionConditionSpecified Condition
SIL (7) ± SG (5)Bus º+º lineDuring transmissionPulse generation
CG (4) ± Body groundChassis groundAlwaysBelow 1 W
SG (5) ± Body groundSignal groundAlwaysBelow 1 W
BAT (16) ± Body groundBattery positiveAlways11 to 14 V
CANH (6) ± CANL (14)HIGH±level CAN bus lineIgnition switch OFF54 to 69 W
CANH (6) ± Battery positiveHIGH±level CAN bus lineIgnition switch OFF1 MW or higher
CANH (6) ± CG (4)HIGH±level CAN bus lineIgnition switch OFF1 kW or higher
CANL (14) ± Battery positiveLOW±level CAN bus lineIgnition switch OFF1 MW or higher
CANL (6) ± CG (4)LOW±level CAN bus lineIgnition switch OFF1 kW or higher
HINT:
Connect the cable of the hand±held tester to the DLC3, turn the
ignition switch ON and attempt to use the hand±held tester. If
the screen displays UNABLE TO CONNECT TO VEHICLE, a
problem exists in the vehicle side or the tester side.

If the communication is normal when the tool is connected
to another vehicle, inspect the DLC3 on the original ve-
hicle.

DID80±01
DI±46
± DIAGNOSTICSENGINE
240 Author: Date:
2005 SEQUOIA (RM1146U)
FAIL±SAFE CHART
If any of the following code is recorded, the ECM enters fail±safe mode.
DTC No.Fail±Safe OperationFail±Safe Deactivation Conditions
P0031
P0032
P0037
P0038
P0051
P0052
P0057
P0058
The heater circuit in which an abnormality is detected is
turned offIgnition switch OFF
P0100
P0102
P0103Ignition timing is calculated from engine speed and throttle
angleºPassº condition detected
P0110
P0112
P0113
Intake air temperature is fixed at 20°C (68°F)ºPassº condition detected
P0115
P0117
P0118
Engine coolant temperature is fixed at 80°C (176°F)ºPassº condition detected
P0120
P0121
P0122
P0123
P0220
P0222
P0223
P0607
P0657
P2102
P2103
P2111
P2112
P2118
P2119
P2135
If the Electronic Throttle Control System (ETCS) has a mal-
function, the ECM cuts off current to the throttle control
motor. The throttle control valve returns to a predetermined
opening angle (approximately 16
) by the force of the return
spring. The ECM then adjusts the engine output by control-
ling the fuel injection (intermittent fuel±cut) and ignition tim-
ing in accordance with the accelerator pedal opening angle
to enable the vehicle to continue at a minimal speed.
If the accelerator pedal is depressed firmly and slowly, the
vehicle can be driven slowly. If the accelerator pedal is
depressed quickly, the vehicle may speed up and slow
down erratically.
ºPassº condition is detected and then the ignition switch is
turned OFF.
P0325
P0330Max. timing retardationIgnition switch OFF
P0351
P0352
P0353
P0354
P0355
P0356
P0357
P0358
Fuel cutºPassº condition detected

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'