Throttle Sensor Adjustment - 95 MY
- Make
- Aston Martin
- Model
- DB7 Factory Workshop Manual Volume 2: Electrics, Body and Air Conditioning
- Year
- 1994–1998
- Section
- Operating instructions › Throttle Sensor Adjustment - 95 MY
Two adjustments may be set with the aid of the PDU on 95 MY vehicles.
- Throttle Potentiometer
- Idle Fuelling Trim
From the 95 MY Main Menu, make and confirm the following sequence of selections:
Diagnostics
Manual or Auto Transmission
Engine
Engine Setup
The following connection diagram will then be displayed.
Engine Setup Connections
Throttle Sensor Adjustment - 95 MY
Note: The throttle stop and throttle cable adjustments must be correct before setting the throttle potentiometer.
On completion of the engine setup connections the test selection screen will be displayed.
- Select Throttle Potentiometer.
- Turn the ignition switch to position II but do not start the engine.
- Monitor the throttle potentiometer bargraph voltage at fully closed and then at fully open throttle.
- The throttle potentiometer voltage specifications are:
Throttle Closed 0.57 - 0.59V
Throttle Full Open 4.00 +V
Throttle Potentiometer Voltage
- If both voltages are either high or low, loosen the two throttle pot screws and adjust the potentiometer until the specified voltages are achieved. Carefully tighten both screws ensuring that the potentiometer does not move during tightening.
- If either voltage is unstable or if the specified voltages cannot be achieved, investigate the cause. If the potentiometer is replaced, set the new pot using steps 3 - 5 above.
Note: On automatic vehicles, the kickdown switch adjustment check follows the throttle pot adjustment.
Parts & tools for this job For 1994 Aston Martin DB7
- TOOLOBD2 scannerSearch: OBD2 scanner
- TOOLDigital multimeterSearch: automotive digital multimeter
- TOOLBack-probe test leadsSearch: back probe test leads
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