When a fault is detected in the Electronic Transmission Range Selector system or the electronic parking brake, the Driver Information Center (DIC) display the message “Service Transmission Now, Unable to Shift Soon” along with a 10 second chime. The driver must acknowledge the message to show other data on the DIC. The frequency that the message and chime occur will increase until a programmed number of trips (50 or 100) are reached with the fault present. At that point, the transmission will not be allowed to shift out of park and the data information center will display the message “Service Transmission, Unable to Shift.” Once the fault is corrected and all related DTCs are cleared, the message will no longer be displayed.

When “Service Shifter See Owner’s Manual” message is shown on the DIC, the shift lever is requiring service. If the vehicle is automatically shifting into P (Park), Inspect the park button for mechanical or electrical faults using the shifter diagnostic procedure. To operate the vehicle, hold the shift lever in the desired gear, R (Reverse) or D (Drive), until vehicle speed exceeds 15 km/h (10 mph), then release the shift lever.