A3 Mk1
Servicing Simos injection system
Testing fuel pump relay and activation
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Note: → The fuel pump relay is located in the central electrics in the left hand footwell, relay position 4. A - Testing fuel pump relay -J17
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=> Current Flow Diagrams, Electrical Fault Finding and Fitting Locations
The fuel pump relay should pick up (can be felt and heard) and the diode test lamp should light up.
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=> Current Flow Diagrams, Electrical Fault Finding and Fitting Locations
B - Testing power supply and activation of fuel pump relay Note: Activation of the fuel pump relay can also be tested using the final control diagnosis. =>Page01-52.
Testing power supply
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Specification: approx. battery voltage in each case
=> Current Flow Diagrams, Electrical Fault Finding and Fitting Locations |
Testing activation
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Diode test lamps with a low current draw do not go out completely but continue to glow faintly until the starter is operated.
If the diode test lamp does not light up, test the wiring as follows:
=> Current Flow Diagrams, Electrical Fault Finding and Fitting Locations
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