Subaru 2009 IMPREZA Service Manual page 1687

Diagnostic Trouble Code (DTC) Detecting Criteria
4. DIAGNOSTIC METHOD
Measure secondary air delivery pipe pressure, pulse of secondary air delivery pipe pressure and secondary
air pipe airflow amount.
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(1) IG
(2) Ne
(3) Secondary air pump operating
status
(4) E-COMB valve (right hand) status
(5) E-COMB valve (left hand) status
(6) Secondary air delivery pipe pres-
sure (psi)
ON
OFF
ON
OFF
OPEN
CLOSE
OPEN
CLOSE
(11)
(10)
(7) Diagnosis enable condition
(8) Pump supply pressure check
(judgement)
(9) Flow amount check (judgement)
(10) Barometric pressure (Pas) mea-
surement before secondary air
control
GD(H4DOTC)-99
(12)
(13)
(11)
(12)
(13)
GENERAL DESCRIPTION
EN-05591
Right bank all closed pressure
(P0R) measurement
Both banks all closed pressure
(P0RL) measurement
Left bank all closed pressure
(P0L) measurement