Subaru LEGACY 2006 Manual page 620

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Diagnostic Trouble Code (DTC) Detecting Criteria
CK:DTC P0852 PARK/NEUTRAL SWITCH INPUT CIRCUIT HIGH (AT MODEL)
1. OUTLINE OF DIAGNOSIS
Judge the open or short circuit of the neutral SW.
Judge as NG when the ECM neutral terminal input differs from the reception data from TCM.
2. ENABLE CONDITION
Secondary Parameters
Ignition switch
Battery voltage
After engine starting
Starter switch
3. GENERAL DRIVING CYCLE
Perform the diagnosis continuously in 2 seconds after starting the engine.
4. DIAGNOSTIC METHOD
Judge as NG when the continuous time until meeting the malfunction criteria below becomes more than 2.56
seconds. Judge as OK and clear the NG when the malfunction criteria below are not met.
Judgment Value
Malfunction Criteria
Neutral switch signal when park/neutral
= "ON" and any other switches = "OFF"
on AT
Time Needed for Diagnosis: 2.56 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cy-
cles.
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 CONDITION
• When the OK driving cycle is completed 3 times in a row
• When "Clear Memory" is performed
7. FAIL SAFE
Control of cruise control: Control prohibited
8. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)
Enable Conditions
ON
≥ 10.9 V
2 seconds or more
OFF
Threshold Value
HIGH (OFF)
GD(H4SO)-183
GENERAL DESCRIPTION