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Fig 1: Identifying Shiftlock

Courtesy of VOLVO CARS OF NORTH AMERICA.

To prevent the gear selector from being unintentionally shifted out of P , 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 P position. The gear selector can only be moved from P 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.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

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

Use the Manual With the Right Hardware

When to See a Mechanic