Subaru LEGACY 2006 Manual page 451

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Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
E: DTC P0032 HO2S HEATER CONTROL CIRCUIT HIGH (BANK 1 SENSOR 1)
1. OUTLINE OF DIAGNOSIS
Detect the open or short circuit of heater.
The heater performs duty control, and the output terminal voltage at ON is 0 V and the output terminal voltage
at OFF is the battery voltage.
Judge as NG when the terminal voltage remains High.
2. COMPONENT DESCRIPTION
(A)
(B)
0V
(A) Battery voltage
(B) Front oxygen (A/F) sensor heater
output voltage
3. ENABLE CONDITION
Secondary Parameters
Battery voltage
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
(D) OFF
ON
(C)
(C) 128 milliseconds
Enable Conditions
≥ 10.9 V
GD(H4SO)-14
EN-01793
(D) High malfunction