Subaru IMPREZA GD 2007 Series Manual page 1847

asieps_tobira_IM_US.book 56 ページ ２０１２年１月１７日 火曜日 午後３時４８分
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
Z: DTC P0131 O2 SENSOR CIRCUIT LOW VOLTAGE (BANK 1 SENSOR 1)
1. OUTLINE OF DIAGNOSIS
Detect the open or short circuit of sensor.
Judge as NG when the element applied voltage is out of range, or the element current is out of range.
2. COMPONENT DESCRIPTION
(2)
(4)
(1) Atmosphere
(2) Exhaust gas
(3) ZrO
2
(4) Ceramic heater
3. ENABLE CONDITION
Secondary Parameters
Voltage
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
5. DIAGNOSTIC METHOD
Judge as NG when the continuous time of meeting any malfunction criteria below is 1 second or more.
Judgment Value
Malfunction Criteria
Input voltage
or
Input current
Time Needed for Diagnosis: 1 second
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
6. DTC CLEAR CONDITION
• When the OK idling cycle is completed 40 times in a row
• When "Clear Memory" is performed
(3)
(1)
(2)
(A) Electromotive force
(B) Air fuel ratio
(C) Lean
(D) Rich
Enable Conditions
≥ 10.9 V
Threshold Value
< 1.8 V
< –0.01 A
GD(H4DOTC)-56
(A)
(C) (B) (D)
EN-01693