Touareg V8-4.2L (AXQ) (2006)
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Start engine, and let run at idle.
Specified value: at least 11.0 V
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Switch ignition off.
If there is no voltage:
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Check voltage supply at 5-pin connector terminal 2 according to wiring diagram:
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Erase DTC memory of Engine Control Module (ECM) , Diagnostic mode 4: Reset/erase diagnostic data.
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Generate readiness code.
If voltage supply and wires are OK:
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Connect multimeter to terminal 4 of connector and engine Ground (GND) for voltage measurement.
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Switch ignition on.
Specified value: at least 4.5 V
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Switch ignition off.
If there is no voltage:
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Check signal and Ground (GND) wires of Mass Air Flow (MAF) sensor.
Checking signal wires and Ground (GND) wires