Transmission Switches

Transmission Switches

Performance Mode Push-button





The performance mode push-button:
- Is mounted on the 'J' gate surround.
- This 'push-on push-off' switch selects Normal or Sport mode ( push-on for Sport)
- Is illuminated when Sport mode is selected.
- Is hard-wired to the transmission control module.

With 'Normal' selected the transmission will start off in 2nd gear with kickdown to 1st being available.

'Sport' mode allows 1st gear engagement from rest and modifies values in the TCM shift point calculations to provide higher upshift speeds and enhanced availability of downshifts.

Kickdown Switch





The kickdown switch:
Is floor mounted under the accelerator pedal.
Is operated by pressing the pedal beyond the full throttle position.
Provides maximum acceleration on driver demand, by signaling the TCM to select the lowest gear to give maximum wheel torque.

Gear selector interlock solenoid:
Prevents the gear selector lever from being moved from P, unless the ignition switch is in position 11, and the brake pedal is depressed.
Is controlled by an output from the BPM

Park position switch:
Is hard-wired to the BPM
Detects when the gear selector lever is moved to the Park position

Dual-Linear Switch (DLS)
The TCM detects gear selection by means of a switch fitted to the 'J' gate, the DLS contains two multi-track slider switches, of which the upper controls P R N D and the lower 4 3 2.
Output from the DLS is changed as the selector lever is moved, thus indicating selected gear position. The parallel signal is input to the TCM by 4 discrete logic wires W0, W1, W2 and W3. The particular sequence or gray code, will indicate which shift position is selected, as shown in the following table where 0 = low and 1 = high:





Gray code






Transmission Unit Gear Selector
The gear selector at the transmission unit:
Is connected to the operators selector module by cable
Operates the selector valve, at the electro-hydraulic control unit