A20806
Rich
Lean
0.45
Oxygen
sensor output voltage (V)
0.50
FAIL
FAIL
Pass / Fail definition of voltage malfunction
Time
PASS
FAIL
0.40
DI
−
412
−
DIAGNOSTICS
ENGINE (2ZZ
−
GE)
2005 CELICA (RM1131U)
HINT:
S
Sensor 1 is the sensor closer to the engine body.
S
The output voltage of the heated oxygen sensor and the short−term fuel trim value can be read using
the OBD II scan tool or the hand−held tester.
MONITOR DESCRIPTION
The ECM uses the heated oxygen sensor information to regulate the air
−
fuel ratio near to the stoichiometric
air
−
fuel ratio. The sensor detects oxygen levels in the exhaust gas and sends this signal to the ECM. This
maximizes the catalytic converter’s ability to purify the exhaust gas.
The heated oxygen sensor element consists of the platinum coated zirconia and heating element. The inner
surface of sensor element is exposed to the outside air, and the outer surface of sensor element is exposed
to the exhaust gas. The sensor generates between 0 V and 1 V of the voltage output in response to the oxy-
gen concentration in the exhaust gas. The sensor’s output voltage varies suddenly in the vicinity of the stoi-
chiometric air
−
fuel ratio.
Under a normal condition, the output voltage from the heated oxygen sensor alternates between RICH and
LEAN sides periodically. When it is 0.4 V or less, the air
−
fuel ratio is judged as LEAN.
If the heated oxygen sensor outputs RICH signal (or LEAN signal) constantly, or if the heated oxygen sensor
cannot output enough voltage to reach the minimum specification, the ECM interprets this as a malfunction
in the heated oxygen sensor and sets a DTC.
MONITOR STRATEGY
Related DTCs
P0130
Front heated oxygen sensor voltage is constant
P2195
Front heated oxygen sensor voltage is constant
at lean side
P2196
Front heated oxygen sensor voltage is constant
at rich side
Required sensors/components
Main sensors/components
Front heated oxygen senor
Related sensors/components
Crank position sensor, Vehicle speed sensor
Frequency of operation
Once per driving cycle
Duration
20 to 36 sec. x (3 time)
MIL operation
2 driving cycles
Sequence of operation
None
610
Содержание Celica 2005
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Страница 115: ...PP3Y3 02 PP 64 PREPARATION BRAKE 2005 CELICA RM1131U RECOMMENDED TOOLS 09082 00040 TOYOTA Electrical Tester 114 ...
Страница 134: ...PP0MW 04 PREPARATION BODY PP 83 2005 CELICA RM1131U LUBRICANT Item Capacity Classification MP grease 133 ...
Страница 219: ...A21571 DI 20 DIAGNOSTICS ENGINE 1ZZ FE 2005 CELICA RM1131U 218 ...
Страница 260: ... DIAGNOSTICS ENGINE 1ZZ FE DI 61 2005 CELICA RM1131U MEMO 259 ...
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Страница 512: ...A21571 DIAGNOSTICS ENGINE 2ZZ GE DI 313 2005 CELICA RM1131U 511 ...
Страница 699: ...DI 500 DIAGNOSTICS ENGINE 2ZZ GE 2005 CELICA RM1131U MEMO 698 ...
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Страница 1599: ...SF0OF 13 B07709 ECM Cover ECM SF 78 SFI ENGINE CONTROL MODULE ECM 2005 CELICA RM1131U ENGINE CONTROL MODULE ECM COMPONENTS 1598 ...
Страница 2219: ...I13605 Door Courtesy Switches Fuel Sender Gauge BE 44 BODY ELECTRICAL COMBINATION METER 2005 CELICA RM1131U 2218 ...
Страница 2220: ...I11735 Connector A Connector B BODY ELECTRICAL COMBINATION METER BE 45 2005 CELICA RM1131U 2219 ...
Страница 2299: ...BE1DE 09 I25302 Antenna Assembly Audio Assembly BE 124 BODY ELECTRICAL ANTENNA 2005 CELICA RM1131U ANTENNA LOCATION 2298 ...
Страница 2308: ...V00012 Shape Example Removal Installation Removal Installation Removal Installation BO 2 BODY CLIP 2005 CELICA RM1131U 2307 ...
Страница 2314: ...BO2ND 07 BO 8 BODY HEADLIGHT 2005 CELICA RM1131U INSTALLATION Installation is in the reverse order of removal See page BO 6 2313 ...
Страница 2348: ...BO2NO 02 H12580 Roof Side Moulding BO 42 BODY ROOF SIDE MOULDING 2005 CELICA RM1131U ROOF SIDE MOULDING COMPONENTS 2347 ...
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