Subaru LEGACY 2006 Manual page 638

asieps_tobira.book 201 ページ ２００９年１０月２６日 月曜日 午前９時１６分
Diagnostic Trouble Code (DTC) Detecting Criteria
CT:DTC P1492 EGR SOLENOID VALVE SIGNAL #1 CIRCUIT MALFUNCTION
(LOW INPUT)
1. OUTLINE OF DIAGNOSIS
• Detects open or short circuit of EGR.
• Judge as NG when the ECM output level differs from the actual terminal level.
2. COMPONENT DESCRIPTION
(1)
(2)
(1) Engine control module (ECM)
(2) Computer unit (CPU)
3. ENABLE CONDITION
Secondary Parameters
EGR valve target position
Battery voltage
4. GENERAL DRIVING CYCLE
Perform diagnosis continuously during EGR operation.
(3)
(4)
(3) Detecting circuit
(4) Switch circuit
Enable Conditions
> 0 step
> 10.9 V
GD(H4SO)-201
GENERAL DESCRIPTION
(5)
(6)
EN-02051
(5) Battery voltage
(6) Main relay