Transmission Control Module (TCM) (TF-80SC AWD; 2006-2007): Design: Shiftlock

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2007 Volvo V70, 2006 Volvo V70, 2005 Volvo V70, 2004 Volvo V70, and 2003 Volvo V70. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Shiftlock

Courtesy of VOLVO CARS OF NORTH AMERICA.

To prevent the gear selector from being unintentionally shifted out of position, the vehicle is equipped with an electronic shiftlock. This blocks the gear selector lever's retaining pin in the lock segment, holding the gear selector in the position. The gear selector can only be moved from one to another gear position when the ignition is on (key position II) and the brake pedal is depressed (brake light switch actuated). The central electronic module (CEM) detects the brake pedal position via a direct connection to the brake pedal sensor. It then sends a signal to the gear selector module (GSM) to deactivate the electromagnetic solenoid in the gear selector assembly. The solenoid lock pin is pulled in and it is possible to depress the catch in the gear selector lever to select another gear. If the ignition key is in "0", the solenoid is deactivated. In this position, the gear selector is manually locked via the keylock function.