Operating principles of the gear shift indicator (Freelander 2)

The gear shift indicator communicates with the fully tuned engine to continuously calculate engine operating parameters and decide whether upshifting will help improve fuel economy. The ECM (Engine Control Module) determines the current gear based on the analysis of signals from the following EEC (Electronic Engine Control) components:

• Engine load; signal from the MAF (mass air flow) sensor.
• Accelerator pedal position and corresponding request; signal from the APP sensor (accelerator pedal position).
• Engine temperature; signal from the coolant temperature sensor.
• Engine speed; signal from the CKP (crankshaft position) sensor.
• Speed of movement; signal from the engine control unit based on signals from the ABS (anti-lock braking system) module via a high-speed CAN bus (data transfer protocol).

Using these signals, the engine control unit applies a special algorithm to monitor the torque and power requests from the driver in the current gear to determine whether this torque and power can be achieved in the next gear in order to reduce fuel consumption without placing unnecessary load on the engine.

The signal from the steering wheel angle sensor is used to block the gear shift indicator from turning on when the vehicle is turning.

Linear Clutch Sensor:



The linear clutch sensor is part of the Stop/Start system and is used to reset the indicator each time a gear is changed. For more information, refer to the chapter: Starting System (303-06C Starting System - 2.2L Duratorq - Td4, Vehicles built from 03/2009, Description and Function).



The two existing clutch position sensors, located on the clutch pedal housing and transmitting signals to various vehicle systems, are also used by the gear shift indicator to check the reliability of the signals.

NOTE: The gear shift indicator does not operate if there is a malfunction in the Stop/Start system.

For further information, please refer to the chapter: Starting system (303-06C Starting system - 2.2L Duratorq - Td4, Vehicles manufactured from 03/2009, Description and operation).