2007 TOYOTA SIENNA Service Repair Manual

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Page 321 of 3000

TOYOTA SIENNA 2007 Service Repair Manual 2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–253
ES
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
All:
Exhaust Camshaft Sensor Range Check / Rationality (While starting engine):
Exhaust Camshaft S

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–253
ES
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
All:
Exhaust Camshaft Sensor Range Check / Rationality (While starting engine):
Exhaust Camshaft Sensor Range Check / Rationality (After starting engine):
Exhaust Camshaft Sensor Range Check (Chattering, Low voltage, High voltage):
TYPICAL MALFUNCTION THRESHOLDS
Exhaust Camshaft Sensor Range Check / Rationality (While starting engine):
Exhaust Camshaft Sensor Range Check / Rationality (After starting engine):
Exhaust Camshaft Sensor Range Check (Chattering):
Related DTCsP0365: Exhaust camshaft sensor (Bank 1) range check / rationality (while starting
engine)
P0365: Exhaust camshaft sensor (Bank 1) range check / rationality (after starting
engine)
P0365: Exhaust camshaft sensor (Bank 1) range check (chattering)
P0367: Exhaust camshaft sensor (Bank 1) range check (low voltage)
P0368: Exhaust camshaft sensor (Bank 1) range check (high voltage)
P0390: Exhaust camshaft sensor (Bank 2) range check / rationality (while starting
engine)
P0390: Exhaust camshaft sensor (Bank 2) range check / rationality (after starting
engine)
P0390: Exhaust camshaft sensor (Bank 2) range check (chattering)
P0392: Exhaust camshaft sensor (Bank 2) range check (low voltage)
P0393: Exhaust camshaft sensor (Bank 2) range check (high voltage)
Required Sensors / Components (Main) Exhaust camshaft sensor (Bank 1 and 2)
Required Sensors / Components (Related) Exhaust camshaft sensor
Frequency of Operation Continuous
Duration5 seconds: Exhaust camshaft sensor range check / rationality (After starting engine)
4 seconds: Others
MIL Operation2 driving cycles: Exhaust camshaft sensor range check / rationality (After starting
engine)
Immediate: Others
Sequence of Operation None
The monitor will run whenever these DTCs are not
presentNone
Sta r t e r ON
Battery voltage while starter is ON at least once Less than 11 V
Engine RPM 600 rpm or more
Sta r t e r OF F
Battery voltage 8 V or more
Ignition Switch ON
Sta r t e r OF F
Ignition Switch ON and time after ignition switch is OFF
to ON2 seconds or more
Battery voltage 8 V or more
Exhaust camshaft sensor signal No signal
Exhaust camshaft sensor signal No signal
Exhaust camshaft sensor signal Less than 0.3 V, or more than 4.7 V

Page 322 of 3000

TOYOTA SIENNA 2007 Service Repair Manual ES–2542GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
Exhaust Camshaft Sensor Range Check (Low voltage):
Exhaust Camshaft Sensor Range Check (High voltage):
WIRING DIAGRAM
Refer to DTC P0335 (See p

Page 323 of 3000

TOYOTA SIENNA 2007 Service Repair Manual 2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–255
ES
(a) Disconnect the C21 or C20 VVT sensor for exhaust
camshaft connector.
(b) Disconnect the E11 ECM connector.
(c) Measure the resistance betw

Page 324 of 3000

TOYOTA SIENNA 2007 Service Repair Manual ES–2562GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
(a) Replace the VVT sensor (See page ES-509).
NEXT
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON posit

Page 325 of 3000

TOYOTA SIENNA 2007 Service Repair Manual 2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–257
ES
(a) Disconnect the C18 or C19 VVT sensor connector.
(b) Disconnect the E9 ECM connector.
(c) Measure the resistance according to the value(s) i

Page 326 of 3000

TOYOTA SIENNA 2007 Service Repair Manual ES–2582GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
MONITOR DESCRIPTION
The ECM uses the sensors mounted in front of and behind the three-way catalyst (TWC) to monitor its
efficiency. The first

ES–2582GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
MONITOR DESCRIPTION
The ECM uses the sensors mounted in front of and behind the three-way catalyst (TWC) to monitor its
efficiency. The first sensor, an Air Fuel ratio (A/F) sensor, sends pre-catalyst A/F ratio information to the
ECM. The second sensor, a heated oxygen sensor (O2S), sends post-catalyst information to the ECM.
The ECM compares these 2 signals to judge the efficiency of the catalyst and the catalyst's ability to store
oxygen. During normal operation, the TWC stores and releases oxygen as needed. The capacity to store
oxygen results in a low variation in the post-TWC exhaust stream.
If the catalyst is functioning normally, the waveform of the heated oxygen sensor slowly switches between
RICH and LEAN. If the catalyst is deteriorated, the waveform will alternate frequently between RICH and
LEAN. As the catalyst efficiency degrades, its ability to store oxygen is reduced and the catalyst output
becomes more variable. When running the monitor, the ECM compares sensor 1 signals (A/F sensor)
over a specific amount of time to determine catalyst efficiency. The ECM begins by calculating the signal
length for both sensors (for the rear oxygen sensor, the ECM uses the output voltage signal length). If the
oxygen sensor output voltage signal length is greater than the threshold (threshold is calculated based on
the A/F sensor signal length), the ECM concludes that the catalyst is malfunctioning. The ECM will turn on
the MIL and a DTC will be set.
HINT:
• Bank 1 refers to the bank that includes cylinder No. 1.
• Bank 2 refers to the bank that does not include cylinder No. 1.
• Sensor 1 refers to the sensor closest to the engine assembly.
• Sensor 2 refers to the sensor farthest away from the engine assembly.
MONITOR STRATEGY
DTC P0420Catalyst System Efficiency Below Threshold
(Bank 1)
DTC P0430Catalyst System Efficiency Below Threshold
(Bank 2)
DTC No. DTC Detection Condition Trouble Area
P0420Oxygen Storage Capacity (OSC) value is smaller than
standard value under active air-fuel ratio control (2 trip
detection logic)• Gas leakage from exhaust system
• A/F sensor (bank 1 sensor 1)
• HO2 sensor (bank 1 sensor 2)
• Exhaust manifold (TWC)
P0430OSC value is smaller than standard value under active
air-fuel ratio control (2 trip detection logic)• Gas leakage from exhaust system
• A/F sensor (bank 2 sensor 1)
• HO2 sensor (bank 2 sensor 2)
• Exhaust manifold (TWC)
Related DTCsP0420: Catalyst Deterioration
P0430: Catalyst Deterioration
Required Sensors / Components (Main) TWC
Required Sensors / Components (Related)A/F sensor, heated oxygen sensor, intake air temperature sensor, mass air flow
meter, crankshaft position sensor and engine coolant temperature sensor
Frequency of Operation Once per driving cycle
Duration Approximately 30 seconds
MIL Operation 2 driving cycles
Sequence of Operation None

Page 327 of 3000

TOYOTA SIENNA 2007 Service Repair Manual 2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–259
ES
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
MONITOR RESULT
Refer to CHECKING MONITOR STATUS (See page ES-19).
CONDITIONING FOR S

Page 328 of 3000

TOYOTA SIENNA 2007 Service Repair Manual ES–2602GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
1. Connect the intelligent tester to the DLC3 (Procedure "A").
2. Start the engine and warm it up with all the accessories switched off

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