P0705

Schematic:

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 on the gear selector shaft. The AT manual shaft shift position switch informs the TCM and the console gear position indicator which gear the driver selects.

The ignition voltage is supplied to the switch on terminal D. Depending on the selector lever position, this ignition voltage connects to the 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 position When the TCM detects an electrical fault or an invalid state, then DTC P0705 will set. DTC P0705 is a type B DTC.

The title of this DTC contains a generic part name.
The specific 4L30-E part the title refers to is named the Manual Shaft Shift Position Switch.

CONDITION FOR RUNNING THE DTC
The ignition switch is in the RUN position.

CONDITION FOR SETTING THE DTC
The switch indicates an undefined or illegal gear position for longer than 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
Use the J 35616-A connector test adapter kit for any test that requires probing the TCM harness connector or the trans range switch harness connector. Using this kit will prevent damage to the harness connector terminals. Do not use the test adapter kit for testing on the Automatic Transmission Control Indicator Connector. This will re-size the female terminals.

Check for the following conditions:
^ Poor connections at the TCM or at the component. Inspect the harness connectors for any backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal to wire connection.
Refer to General Electrical Diagnosis Procedures in Diagrams for proper procedure.
^ Damaged harness. Inspect the wiring harness for damage. If the harness appears to be OK, observe the scan tool while moving any related connectors and any wiring harnesses. A change in the display may help to locate the fault.
^ Refer to Automatic Transmission Manual Shaft Shift Position Switch Logic Table.

TEST DESCRIPTION

Steps 1 - 5:

Steps 6 - 13:

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. Refer to Manual Shaft Shift Position Switch Replacement.
4. Terminal D in the mating connector (harness side) can be used as the power source.