DTC P171E
DTC P171E : Park Pawl System Malfunction of learning mode
General Description
The park pawl actuator driver unit controls shifting/releasing of the park pawl actuator to/from the P position. The park pawl actuator driver unit performs the initial learning according to the command from the powertrain control module (PCM). If the initial learning of the park pawl actuator driver unit does not complete for a specified length of time or more after an initial learning command is output from the PCM, the PCM receives malfunction from the park pawl actuator driver unit, and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | - |
| Sequence | None |
| Duration | 2.3 seconds or more |
| DTC Type | One drive cycle, MIL off, shift position indicator blinks |
Enable Conditions
| Condition | Minimum | Maximum |
|---|---|---|
| 12 volt battery voltage [Battery Voltage] | 10.5 V | - |
| Vehicle | ON mode | |
Malfunction Threshold
The initial learning for the park pawl actuator driver unit has not been completed for at least 2.3 seconds after the initial learning command is output from the PCM.
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.
- Park pawl actuator failure
- Park mechanism failure
Confirmation Procedure
Operating Condition
Turn the vehicle to the ON mode, and wait for at least 10 seconds.
With the HDS
None.
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, the shift position indicator blinks and 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 shift position indicator comes off by turning the vehicle to the OFF (LOCK) mode. The Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the 12 volt battery.