DTC P0032 HO2S HEATER CONTROL CIRCUIT HIGH (BANK 1 SENSOR 1)
|
|
DTC P0032 HO2S HEATER CONTROL CIRCUIT HIGH
(BANK 1 SENSOR 1)
|
Detect the open or short circuit of front
oxygen (A/F) sensor heater. Diagnosis is performed using
front oxygen (A/F) sensor IC, and communication is established
between front oxygen (A/F) sensor IC and main IC. Front
oxygen (A/F) sensor IC judges NG when the data of voltage
and current is abnormal with heater turned on or off.
(1)
|
Protection
tube
|
(2)
|
Gasket
|
(3)
|
Sensor
housing
|
(4)
|
Ceramic
heater
|
|
Secondary
Parameters
|
Enable
Conditions
|
None
|
|
Always perform diagnosis continuously.
Front oxygen (A/F) sensor IC judges
NG when the continuous time until completing one of the malfunction criteria
below becomes more than the time needed for diagnosis (4.5 seconds).
Front oxygen (A/F) sensor IC judges OK and clear NG when
any of the malfunction criteria below are not completed.
Judgment
Value
|
Malfunction
Criteria
|
Threshold
Value
|
Heater
circuit
|
OFF
|
|
> 5
V
|
|
> 1.5
A
|
|
≥ 23
A
|
Time Needed for Diagnosis:
4.5
seconds
Malfunction Indicator
Light Illumination:
Illuminates as soon as the malfunction
occurs.
|
•
|
When the OK idling cycle was completed 40 times
in a row
|
|
•
|
When “Clear Memory” was
performed
|
|
MALFUNCTION
INDICATOR LIGHT CLEAR CONDITION
|
|
•
|
When the OK driving cycle was completed 3 times
in a row
|
|
•
|
When “Clear Memory” was
performed
|
|
•
|
Front oxygen (A/F) sensor main learning
correction: Not allowed to calculate
|
|
•
|
Correction when re-starting at high
temperature: Normally minimum value 0.3 → 0
|
|
•
|
GST communication: Mode$01 “Failure” is
indicated in A/F feedback control condition
|
|
•
|
Purge control: Not allowed to purge
|
|
ECM OPERATING
AT DTC SETTING
|
Memorize the freeze frame data. (For test
mode $02)
