Workshop Manuals Factory service & repair Aston Martin
01 Introduction and safety02 Electrics03 Body and trim04 Air conditioning05 Diagnostic system (PDU)
Aston Martin DB7 Factory Workshop Manual Volume 2: Electrics, Body and Air Conditioning (1994-1998)05 · Diagnostic system (PDU)
05 · Diagnostics

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
Diagnostic system (PDU)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.

Cable Setup diagram showing Diagnostic Socket, 0756 connector, and 0024 connector

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.

  1. Select Throttle Potentiometer.
  2. Turn the ignition switch to position II but do not start the engine.
  3. Monitor the throttle potentiometer bargraph voltage at fully closed and then at fully open throttle.
  4. The throttle potentiometer voltage specifications are:
  5. Throttle Closed 0.57 - 0.59V

    Throttle Full Open 4.00 +V

Throttle Position Sensor screen showing Value: 0.43V, scale from 570 to 600 mV, and text 'Make adjustments as necessary'

Throttle Potentiometer Voltage

  1. 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.
  2. 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

Links open Amazon search results in a new tab. As an Amazon Associate I earn from qualifying purchases.