2003 Volvo XC90 Base, AWDFACTORY OEM SERVICE PROCEDURE

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

Fig 1: Identifying Shiftlock
GLL149402Courtesy 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.

Factory Service Tools

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When to See a Mechanic

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

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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