Driver Shift Control (Tap Shift) Operataion - keywords dic display ipc mode prndl shifter transmission

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Some customers may comment the Driver Shift Control (DSC) display in the Driver Information Center (DIC) operates differently than it did before, or that it operates differently than another vehicle they have driven.

The DSC or "Tap Shift Mode" configuration displayed on the DIC was changed on 2007 STS vehicles with V6 engines, effective December 13, 2006.

Cars built before VIN 1G6DW677770153753, are displayed in Driver Shift Control (DSC) configuration, where the DIC displays the current transmission gear position. While in Tap mode, when a gear is selected the cluster will display that gear number in the DIC (e.g. M5 at the correct speed), when vehicle comes to a stop, the DIC will display the current transmission shift status (e.g. M1). The gear display on the DIC represents the current transmission position.

Cars built after VIN 1G6DW677770153753, are displayed in Electronic Range Select (ERS) configuration, where the DIC displays only the driver selected shifter position. While in Tap mode, when a gear is selected the cluster will display that gear number in the DIC (e.g. M5 at the correct speed), when vehicle comes to a stop, the DIC will keep the same gear number (i.e. M5 in this example) even though the vehicle came to a complete stop.

In 2005 and 06, STS V6 vehicles were built in the ERS configuration. All STS V8 models are in the DSC configuration.

Either Tap Mode display configuration is acceptable, and the change does not represent a problem with the vehicle. It is possible to reconfigure the IPC display from DSC to ERS using TIS2000 or TIS2Web, but it is not possible to change back the other way. Once the IPC is updated, it cannot be changed back.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.