Transmission Control Module (TCM) (TF-80SC; 2007-2014): Design: SHIFTLOCK

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Fig 1: Identifying Shiftlock

Courtesy of VOLVO CARS CORPORATION

To prevent the gear selector from being unintentionally shifted out of, 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 to another gear position when the ignition is on and the brake pedal is depressed. The central electronic module detects the brake pedal position via a direct connection to the brake pedal sensor. It then sends a signal to the gear selector module 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.