Touareg V6-3.2L (BMX) (2005)
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Start engine and let run at idle.
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Turn valve at T-piece of adapter (VAG1318/20) clockwise into bleeder valve to stop.
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Open shut-off valve of pressure gauge briefly and close again to bleed the line to the pressure gauge.
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Measure fuel pressure.
Specified value: approx. 4.0 bar positive pressure
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Switch ignition off.
If specified value is not obtained:
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Check flow quantity of Fuel Pumps (FP) , Fuel Pumps (FP).
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Replace fuel pressure regulator if necessary.
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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 specified value is obtained:
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Check for proper seal and residual pressure. Observe pressure drop on pressure gauge for this. After 10 minutes at least 3.0 bar positive pressure
should still be present.
If residual pressure falls below 3 bar positive pressure:
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Check pressure gauge for proper seal.
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Test check-valves of Fuel Pumps (FP) , Fuel Pumps (FP), checking.
When removing pressure gauge after completed test:
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Remove fuses - 13 - and - 14 - for activation of Fuel Pump (FP) Relay (J17) and Fuel Pump (FP) 2 Relay (J49) from fuse holder.