DTC P1152 O2 SENSOR CIRCUIT RANGE/PERFORMANCE (LOW) (BANK1 SENSOR1)
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DTC P1152 O
2
SENSOR CIRCUIT RANGE/PERFORMANCE
(LOW) (BANK1 SENSOR1)
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Detect that lambda value remains Low.
Judge NG when lambda value is abnormal in
accordance with lambda value of front oxygen (A/F) sensor
and running condition that is vehicle speed, amount of intake air
engine coolant temperature, sub feedback control, etc.
Lambda
value = Actual air fuel ratio/Theoretical air
fuel ratio
(1)
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Atmosphere
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(A)
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Electromotive
force
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(2)
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Exhaust
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(B)
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Air fuel
ratio
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(3)
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ZrO
2
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(C)
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Lean
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(4)
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Ceramic
heater
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(D)
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Rich
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Secondary
Parameters
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Enable
Conditions
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All
secondary parameters to be in enable conditions
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4
seconds or more
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Battery
voltage
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> 10.9
V
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Atmospheric
pressure
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> 75.1
kPa (563 mmHg, 22.2 inHg)
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Rear oxygen
sensor sub feedback
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Operating
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Rear
oxygen sensor output voltage − feedback target voltage
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−0.2
V ←→ 0.1 V
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or
rear oxygen sensor sub feedback compensation coefficient
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On
Min.
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or rear
oxygen sensor sub feedback compensation coefficient
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On Max.
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After
engine starting
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60
seconds or more
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Engine
coolant temperature
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≥ 75°C
(167°F)
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Vehicle
speed
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≥ 20
km/h (12 MPH)
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Amount
of intake air
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≥ 6
g/s
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Load
change during 0.5 engine rev.
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≤ 0.01
g/rev
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Impedance
of front oxygen (A/F) sensor
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0 ←→ 52 Ω
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Learning
value of evaporation gas density
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≤ 0.2
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Total time
of operating canister purge
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20 seconds
or more
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Perform diagnosis continuously at a constant
speed of 20 km/h (12 MPH) or more since 60 seconds after starting
the engine.
Judge NG when the continuous time of completing
the malfunction criteria below becomes more than the time needed
for diagnosis (10 seconds). Judge OK and clear NG when the malfunction
criteria below are not completed.
Judgment
Value
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Malfunction
Criteria
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Threshold
Value
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Output
lambda when rear oxygen sensor sub feedback compensation coefficient being
at not high limit
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≤ 0.85
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Time Needed for Diagnosis:
10
seconds
Malfunction Indicator
Light Illumination:
Illuminates when malfunction occurs in
2 continuous driving cycles.
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•
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When the OK idling cycle was completed 40 times
in a row
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•
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When “Clear Memory” was
performed
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MALFUNCTION
INDICATOR LIGHT CLEAR CONDITION
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•
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When the OK driving cycle was completed 3 times
in a row
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•
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When “Clear Memory” was
performed
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•
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Front oxygen (A/F) sensor main learning
correction: Not allowed to calculate
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•
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Correction when re-starting at high
temperature: Normally minimum value 0.3 → 0
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•
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Purge control: Not allowed to purge
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ECM OPERATION
AT DTC SETTING
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Memorize the freeze frame data. (For test
mode $02)
