Subaru IMPREZA GD 2007 Series Manual page 2015

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Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
DQ:DTC P2009 INTAKE MANIFOLD RUNNER CONTROL CIRCUIT LOW (BANK 1)
1. OUTLINE OF DIAGNOSIS
Detect the open or short circuit of tumble generator valve motor.
Judge as NG when the overcurrent signal is sent from IC after tumble generator valve driving IC diagnosis.
2. COMPONENT DESCRIPTION
(1)
(1) Engine control module (ECM)
3. ENABLE CONDITION
Secondary Parameters
Battery voltage
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
5. DIAGNOSTIC METHOD
At the main IC, check the sent signal at each timing which occurs just before the tumble generator output is
set to ON → OFF, and judge overcurrent NG when the overcurrent NG signal is sent for 1 second. Judge as
OK and clear the NG when the OK signal is sent.
Judgment Value
Malfunction Criteria
Open NG signal input
Overcurrent NG signal input
Time Needed for Diagnosis: 1 second
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
6. DTC CLEAR CONDITION
• When the OK idling cycle is completed 40 times in a row
• When "Clear Memory" is performed
7. MALFUNCTION INDICATOR LIGHT CLEAR CONDITIONS
• When the OK driving cycle is completed three times in a row
• When "Clear Memory" is performed
(2) Tumble generator valve
Enable Conditions
≥ 10.9 V
Threshold Value
High
Low
GD(H4DOTC)-224
(3)
M
(2)
E
E
(3) Battery
EN-01789