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

Datalogger Example (page 3 of 3)

Make
Aston Martin
Model
DB7 Factory Workshop Manual Volume 2: Electrics, Body and Air Conditioning
Year
1994–1998
Section
Operating instructions
Diagnostic system (PDU)Datalogger Example · page 3 of 3

The ‘tick’ icon was selected to return to the trigger screen which will then be as shown below.

Trigger screen showing ABSWL, Trigger, and 6V with icons for S.I., i, and *

The Trigger Set-Up Screen

The ‘tick’ icon was then selected to return to the parameter customisation screen. The screen should now look similar to that below.

Parameter Customisation screen showing Signals: ABSWL, RLW<133, RRW<133, BAT+P20, BAT+P3, FLS2, FLW<133 with units V and KPH, and icons for S.I., ↓, i, and *

Parameter Customisation - Final Setup

The ‘tick’ icon was pressed to access the waveform display.

The PDU was now ready to start recording data.

The ‘record’ icon was selected to start recording data.

When the fault occurred, the ABS warning lamp automatically triggered the PDU. This will place a fixed cursor on the screen and set the time base to zero. The PDU will stop recording after the preset record time. If no record time has been entered, the PDU will use its default record time of 16minutes and 40 seconds. 8m20s pre-trigger and 8m20s post trigger.

The following figure indicates the typical waveform display for the wheel speed sensor fault. The dotted vertical line represents the trigger point.

Wheel Speed Sensor Display showing waveforms for 16V, ABSWL, 0V, 240KPH, RLW<133, 0KPH, 240KPH, RRW<133, 0KPH with values 13.2V and 7KPH, and time markers -55.4s, 7.29s, 39.6s, 39.6s

Wheel Speed Sensor Display

Parts & tools for this job For 1994 Aston Martin DB7

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