engine TOYOTA HIGHLANDER 2001 Service Repair Manual
[x] Cancel search | Manufacturer: TOYOTA, Model Year: 2001, Model line: HIGHLANDER, Model: TOYOTA HIGHLANDER 2001Pages: 2572, PDF Size: 34.8 MB
Page 1782 of 2572
05-204
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
394 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
OBD II MONITOR SPECIFICATIONS
Monitor Strategy
Required Sensors/ComponentsPump module
Frequency of OperationOnce per driving cycle: P0451 FTP sensor output ºStuckº
Continuous: P0451 FTP sensor ºNoiseº, P0450, P0452 and P0453
Duration0.5 sec.: P0450, P0452 and P0453
10 sec.: P0451
MIL OperationImmediate: P0450, P0452 and P0453
2 driving cycles: P0451
Sequence of OperationNone
Typical Enabling Conditions
P0451: FTP sensor ºNoiseº
Monitor runs whenever these DTCs are not presentSee page 05-16
Atmospheric pressure (absolute pressure)70 kPa (525 mmHg) or more, less than 110 kPa (825 mmHg)
Battery voltage10.5 V or more
Intake air temperature4.4 to 35C (40 to 95F)
FTP sensor malfunction (P0450, P0452, P0453)Not detected
Either of following conditions is met:Condition 1 or 2
1. EngineRunning
2. Time after engine stopped5 hours
Example of re-start time
First time7 hours
Second time9 hours and 30 min.
P0451: FTP sensor output ºStuckº
Monitor runs whenever these DTCs are not presentSee page 05-16
Battery voltage10.5 V or more
Intake air temperature4.4 to 35C (40 to 95F)
FTP sensor malfunction (P0450, P0452, P0453)Not detected
Atmospheric pressure (absolute pressure)Less than 70 kPa (525 mmHg), or 110 kPa (825 mmHg) or more
Time after engine stopped5 hours
Example of re-start time
First time7 hours
Second time9 hours and 30 min.
P0450, P0452 and P0453:
Monitor runs whenever these DTCs are not presentSee page 05-16
Ignition switchON
Battery voltage8 V or more
StarterOFF
Typical Malfunction Thresholds
P0450: Pressure sensor chattering
Pressure sensor voltageLess than 0.45 V, or more than 4.9 V
P0451: FTP sensor ºNoiseº
Frequency that FTP change is 2.25 mmHg (0.3 kPa) or
more10 times or more in 10 sec.
P0451: FTP sensor output ºStuckº
FTP change for 10 sec. during EVAP monitor (Reference
pressure)Less than 4.88 mmHg (0.65 kPa)
P0452: Pressure sensor low voltage
Pressure sensor voltageLess than 0.45 V
Page 1783 of 2572
A85256
C17
Pump Module
BJ1 IO1 IM1E7
E5
E7
E5
E5
E7
E5 18
21
28
4
27
34
8VC
PPMP
E2
MPMP
VPMP
PRG
MRELECM
5V
Pressure Sensor
BJ1 IO1 IM1
BJ1 IO1 IM1
BJ1 IO1 IM1 BJ1 IO1 BJ1 IO1
EB1 16 7 13
12 3
17 15 12
14 5 14
18 16 513 4
1S28
S295 5
LG
BJ1 15
J19
J/C
BFBatteryEH
J2
J/C A AFL MAIN
W
W-B W-B
W-B
2
2I1
2F4EFI No. 2
EFI No. 1EFI Relay
2 53
113
IK3 P-L B
2B2D3
52
Y Engine Room J/BB-R
B-R
Vacuum Pump
Vent Valve
4
3
2
1
8
9Y
YY LLP
L
BRBRBR
WW
BR
RVSB
GRY-G BRBR
B-R
G 12
V4
Purge VSV 6
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-205
395 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
P0453: Pressure sensor high voltage
Pressure sensor voltageMore than 4.9 V
WIRING DIAGRAM
Page 1784 of 2572
05-206
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
396 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
NOTICE:
When a vehicle is brought into the workshop, leave it as it is. Do not change the vehicle condi-
tion. For example, do not tighten the fuel tank cap.
Do not disassemble the pump module.
A hand-held tester is required to conduct the following diagnostic troubleshooting procedure.
1 CONFIRM DTC AND EVAP PRESSURE
(a) Connect a hand-held tester to the DLC3.
(b) Turn the ignition switch to ON (do not start the engine).
(c) Turn the tester ON.
(d) Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
(e) Read DTCs.
(f) Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / VAPOR
PRESS.
(g) Read the EVAP (Evaporative Emission) pressure displayed on the tester.
Result:
Display (DTC Output)Test ResultsSuspected Trouble AreasProceed To
P0451'Pressure sensorC
P0452Less than 45 kpa (430 mmHg)
Wire harness/connector (ECM - pressure
sensor)
Pressure sensor
Short in ECM circuit
A
P0453More than 120 kPa (900 mmHg)
Wire harness/connector (ECM - pressure
sensor)
Pressure sensor
Open in ECM circuit
B
B Go to step 4
C Go to EVAP INSPECTION PROCEDURE
(See page 05-317)
A
Page 1789 of 2572
- DIAGNOSTICSSFI SYSTEM (3MZ-FE)
05-573
763 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC P0451 EVAPORATIVE EMISSION CONTROL
SYSTEM PRESSURE SENSOR
RANGE/PERFORMANCE
DTC P0452 EVAPORATIVE EMISSION CONTROL
SYSTEM PRESSURE SENSOR/SWITCH
LOW INPUT
DTC P0453 EVAPORATIVE EMISSION CONTROL
SYSTEM PRESSURE SENSOR/SWITCH
HIGH INPUT
MONITOR DESCRIPTION
DTC ºP0451, P0452 or P0453º is recorded by the ECM when the vapor pressure sensor malfunctions.
P0451
The ECM monitors the vapor pressure sensor in two ways. One method examines the fluctuation of the elec-
trical signal while the engine is idling. If the pressure signal varies beyond the specified range more than 7
times, the ECM interprets this as a fault in the vapor pressure sensor. The ECM also verifies that the pressure
signal changes within the specified range. If the output of the sensor does not vary for 5 minutes while the
intake air amount has been changing, the ECM interprets this as a fault in the vapor pressure sensor. DTC
P0451 will be set when either of the faults occurs and the ECM will turn on the MIL.
P0452 and P0453
When pressure indicated by the vapor pressure sensor deviates below -3.999 kPa (-30 mmHg) or above
1.999 kPa (15 mmHg), the ECM interprets this as a malfunction in the vapor pressure sensor. The ECM will
turn on the MIL and a DTC will be set.
05EXW-05
Page 1791 of 2572
- DIAGNOSTICSSFI SYSTEM (3MZ-FE)
05-575
765 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)DTC No.
DTC Detection ConditionTrouble Area
P0451
Vapor pressure sensor output changes extremely under these
conditions:
Vapor pressure sensor output changes often while vehicle
speed is 0 km/h (0 mph) and the engine is idling 5 to 10 se-
conds (2 trip detection logic)
Vapor pressure sensor output is stuck 5 minutes (2 trip detec-
tion logic)
Open or short in vapor pressure sensor circuit
Vapor pressure sensor
ECM
P0452Vapor pressure sensor output remains less than -30 mmHg
(2 trip detection logic)Open or short in vapor pressure sensor circuit
Vapor pressure sensor
ECM
P0453Vapor pressure sensor output remains more than 15 mmHg
(2 trip detection logic)Open or short in vapor pressure sensor circuit
Vapor pressure sensor
ECM
MONITOR STRATEGY
Related DTCs
P0451: FTP Sensor Noise
P0451: FTP Sensor Stuck
P0452: FTP Sensor Range Check (Low voltage)
P0453: FTP Sensor Range Check (High voltage)
Required sensors / components (Main)FTP sensor
Required sensors / components (Related)ECT sensor, IAT sensor
Frequency of operationOnce per driving cycle
Duration
7 seconds: FTP Sensor Range Check
45 seconds: FTP Sensor Noise
5 minutes: FTP Sensor Stuck
MIL operation2 driving cycles
Sequence operationNone
TYPICAL ENABLING CONDITIONS
All:
The monitor will run whenever these DTCs are not presentSee page 05-377
FTP Sensor Noise P0451:
Altitude7,870 ft. (2,400 m) or less
Battery voltage11 V or more
Throttle position learningCompleted
FTP sensor malfunction (P0452, P0453)Not detected
IAT at engine start - ECT at engine start-7 to 11.1C (-12.6 to 20F)
EVAP VSV, CCVNot operated by scan tool
ECT at engine start4.4 to 35C (40 to 95F)
IAT at engine start4.4 to 35C (40 to 95F)
FTP Sensor Stuck P0451:
Altitude7,870 ft. (2,400 m) or less
Battery voltage11 V or more
Throttle position learningCompleted
FTP sensor malfunction (P0452, P0453)Not detected
IAT at engine start - ECT at engine start-7 to 11.1C (-12.6 to 20F)
EVAP VSV, CCVNot operated by scan tool
ECT at engine start4.4 to 35C (40 to 95F)
IAT at engine start4.4 to 35C (40 to 95F)
Time after engine start5 seconds or more
0.04 inch leakNot detected
0.02 inch leakNot detected
CCV malfunctionNot detected
Page 1792 of 2572
A76903
E2 (-) VC (+)E7
ECM
05-576
- DIAGNOSTICSSFI SYSTEM (3MZ-FE)
766 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
FTP Sensor Range Check P0452,P0453:
ECT at engine start10 to 35C (50 to 95F)
IAT at engine start10 to 35C (50 to 95F)
IAT at engine start - ECT at engine startLess than 12C (21.6F)
Engine conditionRunning
TYPICAL MALFUNCTION THRESHOLDS
FTP Sensor Noise P0451:
Frequency that FTP change6 times or more
FTP Sensor Stuck P0451:
FTP changeNo change for 5 minutes
FTP Sensor Range Check (Low voltage) P0452:
FTPLess than -30 mmHg (-3.999 kPa)
FTP Sensor Range Check (High voltage) P0453:
FTP15 mmHg (1.999 kPa) or more
COMPONENT OPERATING RANGE
FTP-26 to 11 mmHg (-3.5 to 1.5 kPa) or more [734 to 771 mmHg]
WIRING DIAGRAM
Refer to the EVAP INSPECTION PROCEDURE (see page 05-679).
INSPECTION PROCEDURE
HINT:
If DTCs related to different system that have terminal E2 as the ground terminal are output simulta-
neously, terminal E2 may have an open circuit.
Always troubleshoot DTCs P0441 (purge flow), P0446 (VSV for CCV), P0451, P0452 and P0453
(evaporative pressure sensor) before troubleshooting DTCs P0442, P0455 or P0456.
Read freeze frame data using the hand-held tester or the OBD II scan tool. Freeze frame data records
the engine conditions when a malfunction is detected. When troubleshooting, it is useful for determin-
ing whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio
was lean or rich, etc. at the time the malfunction occured.
When the ENGINE RUN TIME in the freeze frame data is less than 200 seconds, carefully check the
vapor pressure sensor.
1 INSPECT ECM (VC VOLTAGE)
(a) Turn the ignition switch ON.
(b) Check the voltage of the ECM connector.
Standard:
Tester ConnectionSpecified Condition
E7-18 (VC) - E7-28 (E2)4.5 to 5.5 V
NG REPLACE ECM (See page 10-24)
OK
Page 1795 of 2572
A96746
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, E: 0.02 Inch Leak Pressure Measurement
Negative
Pressure Atmospheric
Pressure Air Filter
Purge VSV: OFFOFF (vent)
ON
OFF
OFF
ON
ON (closed)ON
ON
ON (closed)
Operation C: EVAP System Pressure Measurement 05-212
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
402 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
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 1796 of 2572
G38299
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 ON: Closed
10
Standard
sec60
E
P0456
OK
EVAP Pressure when EVAP system Leaks:
Leak PressureSecond 0.02 inch
Standard x 0.2
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-213
403 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
(a) P0455: EVAP (Evaporative Emission) gross leak
In operation C, the vacuum pump creates negative pressure (vacuum) in the EVAP system and the EVAP
system pressure is measured. If the stabilized system pressure is higher than [second 0.02 inch leak pres-
sure standard x 0.2] (near atmospheric pressure), the ECM determines that the EVAP system has a large
leakage, illuminates the MIL and sets the DTC (2 trip detection logic).
(b) P0456: EVAP very small leak
In operation C, the vacuum pump creates negative pressure (vacuum) in the EVAP system and the EVAP
system pressure is measured. If the stabilized system pressure is higher than second 0.02 inch leak pres-
sure standard, the ECM determines that the EVAP system has a small leakage, illuminates the MIL and sets
the DTC (2 trip detection logic).
OBD II MONITOR SPECIFICATIONS
Monitor Strategy
Required Sensors/ComponentsPurge VSV and pump module
Frequency of OperationOnce per driving cycle
DurationWithin 15 minutes (varies with amount of fuel in tank)
MIL Operation2 driving cycles
Sequence of OperationNone
Typical Enabling Conditions
The monitor will run whenever these DTCs are not presentSee page 05-16
EVAP key-off monitor runs when all of the following condi-
tions met-
Atomspheric pressure525 to 825 mmHg (70 to 110 kPa)
Battery voltage10.5 V or more
Vehicle speedBelow 4 km/h (2.5 mph)
Ignition switchOFF
Engine conditionNot running
Time after engine stopped5 hours
FTP sensor malfunction (P0450, P0452, P0453)Not detected
Purge VSVNot operated by scan tool
Vent valveNot operated by scan tool
Page 1800 of 2572
A85370
C12
Combination Meter
13WCenter J/B
17
E65 V
SPDECM
9
3J1
3B
1
E9
E1 BR J7
J/C
A
A
BRY
IL29
Y
EE
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-217
407 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
TYPICAL ENABLING CONDITIONS
The monitor will run whenever these DTCs are not presentSee page 05-16
Transmission counter gear speed300 rpm or more
Engine conditionRunning
Ignition switchON
Battery voltage8 V or more
StarterOFF
Either of the following conditions is met:Condition 1 and 2
Condition 1:-
Time after PNP switch turns from ON to OFF2 sec. or more
ECT and ECT sensorECT is 20C (68F) or more and ECT sensor dose not malfunction (P0115 or
P0116)
Condition 2:-
Time after PNP switch turns from ON to OFF30 sec. or more
ECT and ECT sensorECT is less than 20C (68F) or ECT sensor fail is detected (P0115 or P0116)
TYPICAL MALFUNCTION THRESHOLDS
Sensor signalNo pulse input
WIRING DIAGRAM
Page 1801 of 2572
A67446
A62954A85537
4.5
to 5.5 V
0 V
Turn Wheel SPD (+) E1 (-)
E9
ECM
E6
ECM
05-218
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
408 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the hand-held tester or the OBD II scan tool. Freeze frame data records the
engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help deter-
mine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was lean
or rich, and other data from the time the malfunction occurred.
1 CHECK OPERATION OF SPEEDOMETER
(a) Drive the vehicle and check if operation of the speedometer in the combination meter is normal.
HINT:
The vehicle speed sensor is operating normally if the speedometer display is normal.
NG CHECK SPEEDOMETER CIRCUIT
(See page 05-1885)
OK
2 INSPECT ECM (SPD VOLTAGE)
(a) Shift the lever to the neutral position.
(b) Jack up the vehicle.
(c) Turn the ignition switch ON.
(d) Measure the voltage of the ECM connectors as the wheel
is turned slowly.
Standard:
Tester ConnectionSpecified Condition
E6-17 (SPD) - E9-1 (E1)Generated intermittently
HINT:
The output voltage should fluctuate up and down similarly to the
diagram on the left when the wheel is turned slowly.
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
REPLACE ECM (See page 10-9)