DTC P0030 HO2S HEATER CONTROL CIRCUIT (BANK 1 SENSOR 1)
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DTC P0030 HO2S HEATER CONTROL CIRCUIT (BANK
1 SENSOR 1)
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Detect the malfunction of front oxygen (A/F)
sensor heater.
Judge NG when impedance of front oxygen (A/F)
sensor is larger than the standard value by referring to the engine
condition such as fuel shut-off in deceleration, etc.
(1)
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Protection
tube
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(2)
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Gasket
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(3)
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Sensor
housing
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(4)
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Ceramic
heater
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Secondary
Parameters
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Enable
Conditions
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Time
needed for all secondary parameters to be in enable conditions
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60
seconds or more
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Heater
continuity
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In
operation
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Battery
voltage
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> 10.9
V
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After fuel
shut-off
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20 seconds
or more
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Perform diagnosis continuously in 60 seconds
after starting 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 continuous
time of not completing the malfunction criteria below becomes more
than the time needed for diagnosis (10 seconds).
Judgment
Value
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Malfunction
Criteria
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Threshold
Value
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Impedance
of front oxygen (A/F) sensor
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> 52 Ω
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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 OPERATING
AT DTC SETTING
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Memorize the freeze frame data. (For test
mode $02)
