A3 Mk1
Servicing Simos injection system
Testing injectors
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A - Electrical testing of injectors
Specification: approx. 14.5 ω. When the engine is at operating temperature the resistance is increased by approx. 4...6 ω.
B - Testing power supply |
Test conditions
=> Current Flow Diagrams, Electrical Fault Finding and Fitting Locations
=> Current Flow Diagrams, Electrical Fault Finding and Fitting Locations |
C - Testing activation of injectors
Specification: The diode test lamp should flash. Note: Diode test lamps with a low current draw continue to glow faintly between impulses from the engine control unit (rather than going out completely) and become much brighter when receiving an impulse. |
If the diode test lamp does not flash:
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