Subaru IMPREZA GD 2007 Series Manual page 1985

asieps_tobira_IM_US.book 194 ページ ２０１２年１月１７日 火曜日 午後３時４８分
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
CR: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 two seconds after starting the engine.
4. DIAGNOSTIC METHOD
Judge as NG when the continuous time until meeting the malfunction criteria below becomes more than 6.5
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: 6.5 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in two continuous driving
cycles.
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
ON
≥ 10.9 V
2 seconds or more
OFF
Threshold Value
HIGH (OFF)
GD(H4DOTC)-194