S4 V8-4.2L (BHF) (2004)
Cylinder bank 2 (left)
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Remove bolt from coolant reservoir - arrow -.
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Disconnect electrical wiring from Engine Coolant Level (ECL) Warning Switch -F66- and set aside coolant reservoir with coolant hoses - 1 - and -
2 - connected.
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Disconnect electrical harness connector - 2 - to Valve 2 for camshaft adjustment -N208-.
Checking internal resistance
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Connect multimeter to valve for resistance measurement.
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Specified value: 8 to 13.
If specified value is not obtained:
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Replace valve.
If specified value is obtained:
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Check voltage supply.
Checking voltage supply
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Fuse for valve for camshaft adjustment is OK Electrical Wiring Diagrams, Troubleshooting Component Locations.
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Motronic Engine Control Module (ECM) Power Supply Relay -J271- OK.
Note: Voltage for camshaft adjustment valves is supplied via Motronic Engine Control Module (ECM) Power Supply Relay - J271-.