Subaru 2009 IMPREZA Service Manual page 1663

Diagnostic Trouble Code (DTC) Detecting Criteria
AO:DTC P0230 FUEL PUMP PRIMARY CIRCUIT
1. OUTLINE OF DIAGNOSIS
Detect the malfunction of fuel pump control unit.
Judge as NG when the NG signal is sent through a diagnostic line coming from the fuel pump control unit.
Fuel pump control unit detects the open or short circuit malfunction for each line, and then sends NG signals
if one of them is found NG.
2. COMPONENT DESCRIPTION
(1)
(1) Engine control module (ECM)
(2) Fuel pump control unit
3. ENABLE CONDITIONS
Secondary Parameters
None
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
+B
FP+
FPC
(2)
DI
FP-
E
(3) Fuel pump
Enable Conditions
GD(H4DOTC)-75
GENERAL DESCRIPTION
(3)
(4) Battery
(4)
E
EN-01771