Gearbox Modes
- Make
- Aston Martin
- Model
- DB9 Factory Workshop Manual
- Year
- Issue 2, 2005
- Section
- Automatic Control System › Gearbox Modes
Push buttons, mounted on the centre console, are used to select P, R, N and D electrically. The link with the transmission shift console is electric and electronic, via the engine electronics. In addition, gear shifts can be made by using the shift paddles behind the steering wheel ('TouchTronic'). The left paddle is for down-shifts, the right paddle for up-shifts.
Gearbox Modes
Automatic - Button 'D' pressed. Standard drive program (with automatic shifts). Economical use of engine power.
Automatic-Sport - Sport button pressed. Makes full use of the engine power. Moves shifts up to higher engine speeds.
Does not use 6th rear.
TouchTronic - Paddles behind the steering wheel. Manual shifts between all gears (6, 5, 4, 3, 2 and 1). Will auto shift up when engine revs. reach maximum.
TouchTronic-Sport - Manual shifts between all gears with Sport button pressed (6, 5, 4, 3, 2 and 1). Does not auto shift up when engine revs. reach maximum.
Overview of Gearshift Procedures
Park (P)
Select 'P' only with vehicle standing still or moving very slowly (less than 2 km/h). If 'P' is selected without applying the foot brake, the DIM display will read 'PRESS BRAKE PEDAL!'
The 'shift by wire' (SBW) system also includes a mechanical emergency release (Park override) so that the vehicle can be towed away in certain circumstances.
If 'P' is selected from drive position D > 2 km/h, the transmission will read 'CANNOT SELECT PARK AT SPEED'.
Reverse (R)
Select 'R' only when the vehicle is stationary and the engine idling. 'R' can only be engaged if the foot brake has been applied. If 'R' is selected without applying the foot brake, the DIM display will read 'PRESS BRAKE PEDAL!'.
If the vehicle speed is less than approx. 5 km/h (3 mph), 'R' may be selected from 'D', without pressing the brake pedal, to enable a vehicle 'rocking' i.e. to enable vehicle movement out of mud, snow, etc. If 5 km/h (3 mph) is exceeded then the transmission will automatically select 'N'.
Neutral (N)
In neutral, there is no power flow between the engine and the automatic transmission. Apply the handbrake to prevent the vehicle from rolling away when neutral has been selected.
To select 'N' from 'P', the brake pedal must be pressed down, otherwise the DIM display will show 'PRESS BRAKE PEDAL!'. Neutral can be selected from any drive position.
Drive (D)
'D' can only be selected after pressing down the brake pedal. If position 'D' is selected without applying the foot brake, the DIM display will read 'PRESS BRAKE PEDAL!'. From 'D', D-Touch can be selected directly by moving one of the paddles behind the steering wheel.
The standard drive program is in use, with automatic shifts from 1 to 6 and 6 to 1.
The actual gear is added to the 'D' display, for example 'D1' (position D, 1st gear).
If the vehicle speed is less than approx. 5 km/h (3 mph), 'D' may be selected from 'R', without pressing the brake pedal. This enables a vehicle 'rocking' motion, i.e. to enable vehicle movement out of mud, snow, etc.
Drive (D) - Sport
The Sport program is selected at a separate push button on the centre console and must be re-activated each time the engine is started. This is a program that makes full use of the available engine power and moves the shift points farther up the engine-speed scale.
Drive (D) - TouchTronic
Gears are selected by pulling one of the two paddles behind the steering wheel.
Left paddle (-) Right paddle (+)
Down-shift Up-shift
The up and down shift points are protected so that the engine cannot over speed. If the '+' paddle is not operated in time, however, the transmission shifts up to the next higher gear when maximum engine speed is reached.
Pull back simultaneously on both paddles to select Neutral.
Drive (D) - TouchTronic-Sport
In contrast to 'D-TouchTronic', no up-shift takes place in 'D-TouchTronic-Sport' when the maximum engine speed is reached. In this mode (manual program / Sport button operated) no up-shift takes place if the '+' paddle is not operated. Engine over speeding will be prevented only by the governed maximum speed limit.
Parts & tools for this job For 2005 Aston Martin DB9
- TOOLTorque wrenchSearch: 3/8 inch torque wrench
- TOOLSocket setSearch: socket set metric
- BOOKHaynes manualSearch: Haynes manual Aston Martin DB9
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