o2 sensor 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
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- 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 1785 of 2572
A54404
ECM
E5
21 (PPMP)
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-207
397 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
2 CHECK HARNESS AND CONNECTOR(PUMP MODULE - ECM)
(a) Turn the ignition switch to OFF.
(b) Disconnect the E5 ECM connector.
(c) Measure the resistance between PPMP terminal of the
ECM connector and the body ground.
Result:
Test ResultsSuspected Trouble AreasProceed To
10 W or lessWire harness/connector (ECM - pressure sensor)
Short in pressure sensor circuitA
10 kW or moreWire harness/connector (ECM - pressure sensor)
Short in ECM circuitB
(d) Reconnect the ECM connector.
B Go to step 7
A
Page 1786 of 2572
A85252
A54404 A54404
ECM
E5
21
05-208
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
398 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
3 CHECK HARNESS AND CONNECTOR(PUMP MODULE - ECM)
(a) Remove the exhaust tail pipe.
(b) Remove the heat insulator under the canister.
(c) Disconnect the canister connector.
(d) Disconnect the E5 ECM connector.
(e) Check the resistance between PPMP terminal of the ECM
connector and the body ground.
Result:
Test ResultsSuspected Trouble AreasProceed To
10 kW or moreShort in pressure sensor circuitA
10 W or lessShort in wire harness/connector (ECM - pressure sensor)B
(f) Reconnect the canister connector.
(g) Reconnect the ECM connector.
A Go to step 5
B Go to step 6
Page 1787 of 2572
A85252
A85258
Wire Harness Side
C17
Canister
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-209
399 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
4 CHECK HARNESS AND CONNECTOR(PUMP MODULE - ECM)
(a) Turn the ignition switch to OFF.
(b) Remove the exhaust tail pipe.
(c) Remove the heat insulator under the canister.
(d) Disconnect the canister connector.
(e) Turn the ignition switch to ON.
(f) Measure the voltage and resistance of the C17 connec-
tor.
Standard:
Terminal No.Specified Condition
C17-4 - Body groundBetween 4.5 V and 5.5 V
C17-3 - Body groundBetween 4.5 V and 5.5 V
C17-2 - Body groundBelow 1 W
Result:
Test ResultsSuspected Trouble AreasProceed To
Voltage and resistance within standard rangesOpen in pressure sensor circuitA
Voltage and resistance outside standard rangesOpen in wire harness/connector (ECM - pressure sensor)B
(g) Reconnect the canister connector.
A Go to step 5
B Go to step 6
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 1790 of 2572
A76973
ECM
Fuel Tank
Charcoal
Canister EVAP VSV
Vapor Pressure
Sensor
CCV EVAP Service
PortIntake Air
Throttle
Valve
Fuel Tank Cap
Air Cleaner Case
Charcoal Canister Filter Charcoal Filter
Intake Manifold
Purge Line
Air Inlet Line EVAP Line Purge Line
Diaphragm
(Atmospheric Pressure)
Restrictor
Passage
When VSV for EVAP is opened, partial vacuum is created
When CCV is
opened, air is
drawn or released
Leak Detection Area
Fig. 1
(purge valve) 05-574
- DIAGNOSTICSSFI SYSTEM (3MZ-FE)
764 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
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