Description
- Make
- Aston Martin
- Model
- DB9 Factory Workshop Manual
- Year
- Issue 2, 2005
- Section
- Throttle Control › Description
Description
Motorised Throttles
The motorised throttles (x2, one to each inlet manifold) allow accurate control of the inlet air.
A throttle position sensor (TPS) is incorporated into each motorised throttle unit. During normal engine run, TPS signals are used by the PCMs to indicate power demand from the engine. If not already at the desired position, the PCMs will drive the throttle motors to open or close the throttles by the required amount.
At idle, the throttle butterflies are almost closed and idle speed is controlled by small throttle movements.
The throttle butterflies are spring loaded to fail in the idle position. In the event of the throttle butterflies springs failing, air flow will allow the throttle butterflies to fail in the idle position.
No set-up procedure is required.
Specifications
| Torque Figures | ||
|---|---|---|
| Description | Nm. | lb./ft. |
| Throttle body | 8-12 | 6-9 |
Maintenance
Throttle Body
| Repair Operation Time (ROT) | |
|---|---|
| Item | Code |
| Throttle Body Renew | LH 03.04.HB |
| RH 03.04.JB | |
Removal
- Disconnect the air intake pipe.
- Disconnect the wiring harness plug.
- Remove bolts (x4).
- Withdraw throttle body complete with gasket. Discard the 'O' ring.
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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