DTC P2801: Transmission Range Switch ATPFWD2 Switch (Open) (DCT)
General Description
Transmission range switch contact point input matrix
| Shift lever position | Input per switch | |||||||
|---|---|---|---|---|---|---|---|---|
| ATP-P | ATP-R | ATP-RVS1 | ATP-RVS2 | ATP-N | ATP-D | ATP-FWD1 | ATP-FWD2 | |
| P | O | X | X | X | X | X | X | X |
| R | X | O | O | O | X | X | X | X |
| N | X | X | X | X | O | X | X | X |
| D | X | X | X | X | X | O | O | O |
O: Closed X: Open
The transmission range switch is attached to a control shaft. Operating the shift lever makes the control shaft rotate via the shift cable. The A/T gear position indicator shows which position is selected according to the Low/High signal combinations, which vary based on the control shaft rotational angle. Signals from the transmission range switch are used to determine forward/neutral/reverse. The voltage is high (5 V or 12 V) at the powertrain control module (PCM) input terminal when each transmission range switch position is open, and it is low (0 V) when each switch is closed. If the FWD2 switch is open while the shift lever position is in D position/mode, the PCM detects a malfunction in the transmission range switch (open) and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type, OBD Status
| Execution | Continuous |
| Sequence | None |
| Duration | 2.0 seconds or more |
| DTC Type | Two drive cycles, MIL off, A/T gear position indicator blinks |
| OBD Status | PASSED/FAILED/NOT COMPLETED (STILL TESTING) |
Enable Conditions
| Condition | Minimum | Maximum |
|---|---|---|
| 12 volt battery voltage [Battery Voltage] | 11 V | - |
| No active DTCs set (prevents monitor from running) | P0705, P0706 | |
[ ]: HDS Parameter
Malfunction Threshold
No FWD2 position signal [Forward Switch2 (ATPFWD)] for at least 2.0 seconds while the shift lever position is in D position/mode.
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.
- Transmission range switch ATP-FWD2 line open (includes connector loose connection or disconnection)
- Transmission range switch failure
- PCM internal circuit failure
Confirmation Procedure
Operating Condition
- 1.
Start the engine.
- 2.
With the brake pedal pressed, place the shift lever in D position/mode for at least 2 seconds.
With the HDS
None.
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, the A/T gear position indicator blinks and a Confirmed DTC and the freeze data are stored. The MIL does not come on.
Conditions for clearing the DTC
The A/T gear 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.