P0705

DTC P0705












Circuit Description with 4L30-E Automatic Transmission
The AT manual shaft shift position switch is attached externally to the left side of the 4L30-E transmission. The AT manual shaft shift position switch informs the Transmission Control Module (TCM) and the console gear position indicator which gear the driver selects.
Ignition voltage is supplied to the switch on terminal D. Depending on the selector lever position, the ignition voltage connects to various combinations of terminals A, B. C, and G of the AT manual shaft shift position switch. The TCM decodes these combinations in order to determine gear selector lever position. Refer to the Automatic Transmission Manual Shaft Shift Position Switch Logic Table. When the TCM detects an electrical fault or an invalid state, DTC P0705 will set. DTC P0705 is a type B DTC.

Condition for Running the DTC
The ignition is ON.

Condition for Setting the DTC
The switch indicates an undefined or illegal gear position for 20 seconds.

Action Taken When the DTC Sets
^ The TCM flashes the sport mode lamp and sends a MIL request to the ECM on the second consecutive drive trip that the diagnostic runs and fails. The ECM then illuminates the MIL.
^ The ECM records the operating conditions in the Freeze Frame at the time of the MIL request from the TCM.
^ The transmission operates in the default mode (maximum line pressure, command 4th gear, inhibit TCC, freeze shift adapts).

Conditions For Clearing the MIL/DTC
^ The ECM turns off the MIL after three consecutive drive trips during which the TCM sends no MIL request.
^ A History DTC clears after forty consecutive warm-up cycles, if no failures are present by this diagnostic or any other emission related diagnostic.
^ The scan tool clears the MIL/DTC.
^ The TCM cancels the DTC default mode actions when the ignition switch is Off long enough in order to power down the TCM.

Diagnostic Aids
Refer to the Automatic Transmission Manual Shaft Shift Position Switch Logic Table.

Test Description
The numbers below refer to the step numbers on the Diagnostic Table.
2. The Scan Tool display should match the selector lever position at each detent. If the lever has to be moved slightly within a position to get the right indication on the Scan Tool, the AT manual shaft shift position switch adjustment should be checked.
4. Terminal D on the transmission harness side can be used as the power source.