2007 TOYOTA SIENNA Service Repair Manual

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Page 497 of 3000

TOYOTA SIENNA 2007 Service Repair Manual 2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–191
ES
NOTICE:
The Air-Fuel Ratio (A/F) sensor has an output delay of a few seconds and the Heated Oxygen
(HO2) sensor has a maximum output delay of

Page 498 of 3000

TOYOTA SIENNA 2007 Service Repair Manual ES–1922GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
– Following the A/F CONTROL procedure enables technicians to check and graph the voltage outputs
of both the A/F and HO2 sensors.
– To dis

Page 499 of 3000

TOYOTA SIENNA 2007 Service Repair Manual 2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–193
ES
OK
(a) Connect the intelligent tester to the DLC3.
(b) Start the engine and turn the tester on.
(c) Warm up the engine at an engine speed of 25

Page 500 of 3000

TOYOTA SIENNA 2007 Service Repair Manual ES–1942GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
Lean: During A/F CONTROL, the A/F sensor output
voltage (AFS) is consistently more than 3.35 V, and the
HO2 sensor output voltage (O2S) is co

Page 501 of 3000

TOYOTA SIENNA 2007 Service Repair Manual 2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–195
ES
Between 7.4 g/s and 18.9 g/s (shift position: N, A/
C: OFF).
NG
OK
(a) Check the fuel pressure (See page FU-7).
NG
OK
OK:
No gas leakage.
NG
OK

Page 502 of 3000

TOYOTA SIENNA 2007 Service Repair Manual ES–1962GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
(a) Disconnect the A5 or A6 A/F sensor connectors.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistanc

Page 503 of 3000

TOYOTA SIENNA 2007 Service Repair Manual 2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–197
ES
(a) Disconnect the A5 or A6 A/F sensor connectors.
(b) Turn the ignition switch to the ON position.
(c) Measure the voltage according to the va

Page 504 of 3000

TOYOTA SIENNA 2007 Service Repair Manual ES–1982GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
NG
OK
(a) Replace the air fuel ratio sensor (for 2WD model (See
page EC-19) or 4WD model (See page EC-26)).
NEXT
(a) Connect the intelligent t

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