TT Quattro Roadster L4-1.8L Turbo (AMU) (2002)
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Check resistance of individual fuel injectors.
Specification: 12 to 13 ohms (at room temperature)
If specified value is not obtained:
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Replace fuel injector.
If specified value is obtained:
Checking voltage supply
Test requirements
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Fuel Pump (FP) OK, checking. See: Computers and Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Fuel
Pump (Fp) Relay -J17-, Testing and Activating
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Fuse for fuel injectors OK
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Disconnect harness connector at the fuel injector to be tested.
NOTE: In order to prevent a mix-up of the harness connectors at the fuel injectors, each group of two connectors are connected with a plastic track.
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Connect VAG1527B voltage tester as follows:
Harness connector
Measure to
Terminal
1
Engine Ground (GND)
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Operate starter briefly (engine can also start).
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LED must light up.
If LED does not light up:
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Check wire connection between terminal 1 and fuse for fuel injector for open circuit.
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Repair open circuit if necessary.
If LED lights up:
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Check activation of fuel injectors.
Checking activation of fuel injectors