P0705

DTC P0705

Circuit Description
The transmission range (TR) switch is part of the park/neutral position switch assembly and is mounted on the transmission manual shaft. The TR switch is a multi-signal switch. The powertrain control module (PCM) supplies ignition voltage to the TR switch on 7 signal circuits, P, R, N, D, 1, L, and Forward Range. Each gear selector lever position grounds one or more of the signal circuits in a unique pattern. In order to determine the gear range selected by the driver, the PCM compares the voltage combination on the signal circuits to a TR switch combination table stored in memory. When the PCM detects an invalid combination of TR switch signals, DTC P0705 sets. DTC P0705 is a type A DTC.

Conditions for Running the DTC
System voltage is 11 volts or greater.

Conditions for Setting the DTC
- Incorrect combination of 2 or more transmission range switch signals, with the TR SW. Forward Range signal input LOW at the same time, for 1 second or greater.
- The TR SW. Forward Range signal input is LOW when P, R, N or L gear range is selected, for I second or greater.

Action Taken When the DTC Sets
- The PCM illuminates the malfunction indicator lamp (MIL).
- The PCM limits the transmission shift to 2nd and 3rd gears.
- The PCM records the operating conditions when the Conditions for Setting the DTC are met. The PCM stores this information as Freeze Frame and Failure Records.
- The PCM stores DTC P0705 in PCM history.

Conditions for Clearing the MIL/DTC
- The PCM turns OFF the MIL during the third consecutive trip in which the diagnostic test runs and passes.
- A scan tool can clear the MIL/DTC.
- The PCM clears the DTC from PCM history if the vehicle completes 40 warm-up cycles without an emission related diagnostic fault occurring.
- The PCM cancels the DTC; default actions when the ignition switch is OFF long enough in order to power down the PCM.

Diagnostic Aids
- Inspect the connectors at the PCM, the output speed sensor, and all other circuit connecting points for an intermittent condition.
- Inspect the circuit wiring for an intermittent condition.
- Inspect for a shorted TR switch wire.
- Inspect for a faulty TR switch.
- Inspect for an internal fault of the PCM.

Test Description
The numbers below refer to the step numbers on the diagnostic table.
5. By disconnecting the TR switch, the ground path for all TR switch circuits are removed and the PCM should recognize all circuits as open. The scan tool should display HI for all range signals.
6. This step tests the TR switch wiring for an open or lack of signal voltage from the PCM.
7. This step tests the TR switch wiring and the PCM by providing a ground path through a fused jumper wire. When grounded, the scan tool range signal park should change to LOW.
8. This step tests the TR switch wiring and the PCM by providing a ground path through a fused jumper wire. When grounded, the scan tool range signal reverse should change to LOW.
9. This step tests the TR switch wiring and the PCM by providing a ground path through a fused jumper wire. When grounded, the scan tool range signal neutral should change to LOW.
10. This step tests the TR switch wiring and the PCM by providing a ground path through a fused jumper wire. When grounded, the scan tool range signal drive should change to LOW.
11. This step tests the TR switch wiring and the PCM by providing a ground path through a fused jumper wire. When grounded, the scan tool range signal intermediate should change to LOW.
12. This step tests the TR switch wiring and the PCM by providing a ground path through a fused jumper wire. When grounded, the scan tool range signal forward should change to LOW.
13. This step tests the TR switch wiring and the PCM by providing a ground path through a fused jumper wire. When grounded, the scan tool range signal low should change to LOW.

Steps 1 - 6:

Steps 7 - 16:

Steps 17 - 21:

DTC P0705