DTC P0852: Neutral Switch Input Circuit High

• Detect the open/short circuit of neutral switch.
• AT: Judge NG when ECM neutral terminal input is different from reception data from TCM
• MT: Judge NG when the neutral switch does not respond even though shift lever is changed (neutral switch is turned on or off by vehicle and engine speed).

Perform the diagnosis continuously after starting the engine.

• Abnormality Judgement 

  AT: Judge NG when the continuing time of completing the malfunction criteria below reached to 5 seconds.

  Judgment Value 

  JUDGMENT VALUE
  
  

  Malfunction Criteria	Threshold Value
  Switch signal	OFF (High)
  "P" range / "N" range on AT	ON
  Any other switches on AT	OFF

• Normality Judgment 

  AT: Judge OK and clear the NG when the malfunction criteria below are completed.

  Judgment Value 

  JUDGMENT VALUE
  
  

  Malfunction Criteria	Threshold Value
  Switch signal	ON (Low)
  "P" range / "N" range on AT	ON
  Any other switches on AT	OFF

  MT: Judge NG when the number of times until completing the malfunction criteria below continue 3 times in a row, judge OK when turning to OFF or ON.

  Judgment Value 

  JUDGMENT VALUE
  
  

  Malfunction Criteria	Threshold Value
  Neutral switch on MT	Can not detect SW OFF (High)
  Driving condition change Vehicle speed = 0 km/h (0 MPH) & engine speed 600 - 900 rpm Vehicle speed 64 - 106 km/h (40 - 66 MPH) & engine speed 1600 -2550 rpm	Change a) to b)

Time Needed for Diagnosis: 

• 5 seconds on AT
• 3 monitoring on MT

  Malfunction Indicator Light Illumination:  Illuminates when malfunction occurs in 2 continuous driving cycles.

• When the OK idling cycle is completed 40 times in a row
• When "Clear Memory" was performed

• When the OK driving cycle was completed 3 times in a row
• When "Clear Memory" was performed

None

Memorize the freeze frame data. (For test mode $02)