Subaru IMPREZA GD 2007 Series Manual page 1862

asieps_tobira_IM_US.book 71 ページ ２０１２年１月１７日 火曜日 午後３時４８分
Diagnostic Trouble Code (DTC) Detecting Criteria
11.GENERAL DRIVING CYCLE
Perform the diagnosis only once when deceleration fuel cut occurs after rapid acceleration. (Pay attention to
the oxygen sensor voltage for the timing of the deceleration.)
12.DIAGNOSTIC METHOD
Calculate the minimum value of 0.3 V to 0.5 V output change response time as judgment value, when the ox-
ygen sensor output voltage changes from 0.25 V (lean) to 0.55 V (rich).
Diagnosis execution
condition
0.55V
0.5V
Rear O sensor (V)
2
0.3V
0.25V
0V
Fuel cut on deceleration
Measure the response time
(diagnostic value).
>= 6s
Execute the malfunction judgement 2 seconds
after the recovery of fuel cut on deceleration.
GD(H4DOTC)-71
GENERAL DESCRIPTION
Judge as NG when the voltage
of rear oxgen sensor is 0.25 V
or less for 120 seconds or more
after recovery of fuel cut on
deceleration.
>= 120s
WI-02210