Engine Intervention
- Make
- Aston Martin
- Model
- DB9 Factory Workshop Manual
- Year
- Issue 2, 2005
- Section
- Anti-lock Braking System (ABS) › Engine Intervention
Engine Intervention
In the event of wheel-slip the ABS / DSC module calculates the torque, which should be applied by the engine to reduce the wheel-slip (this torque does not exceed driver demand). Engine torque reduction is then requested from the PCM via the CAN bus. The PCM, in response to these signals, reduces engine torque by controlling the ignition and fuelling. A traction control gearshift pattern is automatically selected within the automatic transmission software whenever traction control is active.
Brake Intervention
This function operates by increasing the pressure in the brake caliper of the slipping wheel, by closing the separation valve and the inlet valve of the non-slipping wheel and running the modulator pump. This takes fluid from the fluid reservoir via the non-actuated master cylinder and pressurizes the brake caliper. The pressure is modulated at the caliper via the inlet and outlet valves to achieve the desired wheel-slip target to maximize traction.
ABS / DSC Circuit
Specifications
Oils/Greases
Brake Fluid Castrol Response Super Dot 4
Torque Figures
| Description | Nm. | lb./ ft. |
|---|---|---|
| Modulator to Bracket | 5 | 4 |
| Modulator / Bracket to body | 9 | 7 |
| Brake hose unions | 17 | 13 |
| 14 | 10.5 |
Parts & tools for this job For 2005 Aston Martin DB9
- PARTEngine gasket setSearch: Aston Martin DB9 2005 engine gasket set
- TOOLTorque wrenchSearch: 3/8 inch torque wrench
- TOOLFeeler gauge setSearch: feeler gauge set
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