Subaru IMPREZA GD 2007 Series Manual page 2004

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Diagnostic Trouble Code (DTC) Detecting Criteria
DC:DTC P1518 STARTER SWITCH CIRCUIT LOW INPUT
1. OUTLINE OF DIAGNOSIS
Detect the open or short circuit of starter SW.
Judge as OFF NG when the engine starts without the starter SW signal entering.
2. ENABLE CONDITION
Secondary Parameters
None
3. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
4. DIAGNOSTIC METHOD
Abnormality Judgment
Judge as OFF NG when the malfunction criteria below are met.
Judgment Value
Malfunction Criteria
Vehicle speed
Starter ON signal
Engine speed after engine speed of less
than 500 rpm continues for 0.8 seconds
or more.
Time Needed for Diagnosis: 800 milliseconds
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in two continuous driving
cycles.
Normality Judgment
Judge as OFF OK and clear the NG when the malfunction criteria below are met.
Judgment Value
Malfunction Criteria
Starter ON
Starter ON diagnosis
Battery voltage
5. DTC CLEAR CONDITION
• When the OK idling cycle is completed 40 times in a row
• When "Clear Memory" is performed
6. MALFUNCTION INDICATOR LIGHT CLEAR CONDITIONS
• When the OK driving cycle is completed three times in a row
• When "Clear Memory" is performed
7. FAIL SAFE
None
8. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)
Enable Conditions
Threshold Value
< 1 km/h (1 MPH)
Not detected
≥ 500 rpm
Threshold Value
Experienced
No diagnosis experi-
enced
> 8 V
GD(H4DOTC)-213
GENERAL DESCRIPTION