DTC Advanced Diagnostics: P0705
DTC P0705 : Transmission Range Switch Circuit Short
General Description
Transmission range switch contact point input matrix:
| Shift position/mode | Input per switch | ||||||
|---|---|---|---|---|---|---|---|
| ATP-P | ATP-R | ATP-RVS | ATP-N | ATP-D | ATP-S | ATP-FWD | |
| P | O | X | X | X | X | X | X |
| R | X | O | O | X | X | X | X |
| N | X | X | X | O | X | X | X |
| D | X | X | X | X | O | X | O |
| S | X | X | X | X | X | O | O |
O: Closed X: Open
The transmission range switch is attached to a control shaft. Shifting the transmission to each position/mode makes the control shaft rotate via the shift cable. The shift position indicator shows which position is selected according to the Low/High signal combinations, which vary based on the control shaft rotational angle. The control shaft changes the position of the transmission range switch, activates the manual valve, and switches hydraulic pressure to shift the transmission through forward/neutral/reverse. The transmission range switch signal is used to determine the shift schedule. The voltage is high (5 V or 12 V) at the transmission control module (TCM) input terminal when each transmission range switch position is open, and it is low (0 V) when each switch is closed. If the TCM detects multiple switch inputs instead of the correct switch input for the selected range at that time, it detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
| Duration | 1 second or more |
| DTC Type | One drive cycle, MIL on, Shift position indicator blinks |
Enable Conditions
| Condition | Minimum | Maximum |
|---|---|---|
| 12 volt battery voltage [Battery Voltage] | 10.0 V | - |
[ ]: HDS Parameter
Malfunction Threshold
One of these conditions occurs.
- The TCM detects the selected range switch input and another range switch input (except FWD switch input [Forward Switch]) simultaneously for at least 1 second.
- The TCM detects the P, R, or N range switch input [A/T P, R, or N Switch] and the FWD switch input [Forward Switch] simultaneously for at least 1 second.
Possible Cause
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 line short to ground
- Transmission range switch failure
- TCM internal circuit failure
Confirmation Procedure
Operating Condition
- Start the engine.
- With the brake pedal pressed, shift the transmission to each position/mode for at least 1 second.
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, the MIL comes on, the shift position indicator blinks, and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the TCM memory.
Conditions for clearing the DTC
The shift position indicator comes off by turning the vehicle to the OFF (LOCK) mode. The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool clear command.