DTC P0852
DTC P0852: Neutral Position Sensor A Circuit High Voltage
General Description
Table A: Neutral position sensor output voltage
| NSS1 voltage | NSS2 voltage | |
|---|---|---|
| Neutral | 2.7 - 3.0 V | 1.35 - 1.5 V |
Neutral position sensor A and neutral position sensor B are semiconductor type that output different voltage characteristics. Each neutral position sensor output voltage which depends on the condition is shown in Table A. The powertrain control module (PCM) judges whether it is in neutral or not from the neutral position sensor output voltage, and uses the information for auto idle stop system control and other controls. Neutral position sensor A is for judging the neutral, and the sensors compare their output voltage to each other for malfunction detection. When the neutral position sensor A output voltage is a specified voltage for a set time, the PCM detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
| Duration | 2.0 seconds or more |
| DTC Type | One drive cycle, MIL off |
Enable Conditions
| Condition | Minimum | Maximum |
|---|---|---|
| 12 volt battery voltage [BATTERY] | 10.0 V | - |
| Vehicle | ON mode | |
[ ]: HDS Parameter
Malfunction Threshold
The neutral position sensor A output voltage [NEUTRAL POSITION SENSOR 1] is 3.5 V or more for at least 2.0 seconds.
Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
- Neutral position sensor A SG line open
- Neutral position sensor A NSS1 line short to power
- Neutral position sensor A failure
- PCM internal circuit failure
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, a Pending DTC, a Confirmed DTC, and the freeze data are stored in the PCM memory. The MIL does not come on.
Conditions for clearing the DTC
The Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command.