2001 TOYOTA SEQUOIA Service Repair Manual

oil dipstick remote start airbag off warning gas mileage technical data

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Page 473 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual A23508
Wire Harness Side:
Canister Connector
Front View
L5
A23446
L5
± DIAGNOSTICSENGINE
DI±271
465 Author: Date:
2005 SEQUOIA (RM1146U)
4 Measure voltage and resistance of pump module connector

Page 474 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual DI±272
± DIAGNOSTICSENGINE
466 Author: Date:
2005 SEQUOIA (RM1146U)
7 Replace ECM (See page SF±80).
NEXT
8 Check whether DTC output recurs.
PREPARATION:
(a) Connect the hand±held tester to th

Page 475 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual ± DIAGNOSTICSENGINE
DI±273
467 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0455 Evaporative Emission Control System Leak
Detected (Gross Leak)
DTC P0456 Evaporative Emission Control System Leak
De

Page 476 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual B17399
Fuel Tank Canister
Vacuum Pump: OFF Pressure Sensor 0.02 Inch Orifice
Pump Module
Operation A: Atmospheric Pressure Measurement
Vent Valve: OFF (vent)
Operation D: Purge VSV monitor Operation

B17399
Fuel Tank Canister
Vacuum Pump: OFF Pressure Sensor 0.02 Inch Orifice
Pump Module
Operation A: Atmospheric Pressure Measurement
Vent Valve: OFF (vent)
Operation D: Purge VSV monitor Operation B: 0.02 Inch Leak Pressure Measurement
Negative
Pressure Atmospheric
Pressure
Operation C: EVAP Leak Check
Air Filter
Purge VSV: OFFOFF (vent)
ON
OFF
OFF
ON
ON (closed)ON
ON
ON (closed)
DI±274
± DIAGNOSTICSENGINE
468 Author: Date:
2005 SEQUOIA (RM1146U)
MONITOR DESCRIPTION
5 hours* after the ignition switch is turned OFF, the electric vacuum pump creates negative pressure (vacu-
um) in the EVAP (Evaporative Emission) system. The ECM monitors for leaks and actuator malfunctions
based on the EVAP pressure.
HINT:
*: If the engine coolant temperature is not below 35C (95F) 5 hours after the ignition switch is turned off,
the monitor check starts 2 hours later. If it is still not below 35C (95F) 7 hours after the ignition switch is
turned off, the monitor check starts 2.5 hours later.
SequenceOperationsDescriptionsDuration
±ECM activationActivated by soak timer, 5 hours (7 or 9.5 hours) after ignition switch turned to OFF.±
AAtmospheric pressure
measurement
Vent valve turned OFF (vent) and EVAP system pressure measured by ECM in order to
register atmospheric pressure.
If EVAP pressure is not between 70 kPa and 110 kPa (525 mmHg and 825 mmHg), ECM
cancels EVAP system monitor.
10 seconds
B
First 0.02 inch leak
pressure measure-
mentIn order to determine 0.02 inch leak pressure standard, vacuum pump creates negative pres-
sure (vacuum) through 0.02 inch orifice and them ECM checks if vacuum pump and vent
valve operate normally.
60 seconds
CEVAP system pres-
sure measurement
Vent valve turned ON (closed) to shut EVAP system.
Negative pressure (vacuum) created in EVAP system, and EVAP system pressure then
measured.
Write down the measured value as it will be used in the leak check.
If EVAP pressure does not stabilize within 15 minutes, ECM cancels EVAP system monitor.
15 minutes*
DPurge VSV monitorPurge VSV opened and then EVAP system pressure measured by ECM.
Large increase indicates normal.10 seconds
E
Second 0.02 inch leak
pressure measure-
mentLeak check is performed after second 0.02 inch leak pressure standard is measured.
If stabilized system pressure higher than second 0.02 inch leak pressure standard, ECM
determines that EVAP system leaking.
60 seconds
FFinal checkAtmospheric pressure measured and then monitoring result recorded by ECM.±
* If only a small amount of fuel is in the fuel tank, it takes longer for the EVAP pressure to stabilize.

Page 477 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual A23486
Purge VSV
Vent Valve
Vacuum Pump
EVAP Pressure
Positive
Leak Pressure
sec NegativeONON
Sequence
TimeA
10
sec60
Within 15 minutes
sec ON
First 0.02 inch
BCD
P0455
ON: Open
OFF: Closed
OFF: Vent

Page 478 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual DI±276
± DIAGNOSTICSENGINE
470 Author: Date:
2005 SEQUOIA (RM1146U) Atmospheric pressure
525 to 825 mmHg (70 to 110 kPa)
Battery voltage10.5 V±
Vehicle speed±4 km/h (2.5 mph)
Ignition switchOF

Page 479 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual ± DIAGNOSTICSENGINE
DI±277
471 Author: Date:
2005 SEQUOIA (RM1146U) 6. Second reference pressure measure-
ment
±
Next sequence is run if all of following
conditions setCondition 1, 2, 3 and 4
1

Page 480 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual P22487
Vehicle Speed
SensorCombination
MeterECM 4±pulse 4±pulse DI±278
± DIAGNOSTICSENGINE
472 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0500 Vehicle Speed Sensor ºAº
DTC P0503 Vehicle Speed

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