Touareg 2 V6-3.6L (BHK) (2008)
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Compare quantity of fuel delivered with minimum delivery rate in diagram (cm3/15s).
‹› Voltage at fuel pump with engine stopped and pump running is approx. 2 volts less than battery voltage.
If minimum delivery rate is not attained:
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Check fuel lines for possible restrictions (kinks) or blockages.
If lines are OK:
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Replace fuel filter.
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Repeat test.
If specified value is again not obtained:
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Fuel Pump (FP) faulty, replace fuel delivery unit.
If delivery rate has been attained but nevertheless you suspect a fuel supply system malfunction (e.g. intermittent failure of fuel supply system):
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Check Fuel Pump (FP) current draw --> [ Delivery Rate, Checking ].
Delivery Rate, Checking
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Check current draw of fuel pump as follows:
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Reconnect all disconnected fuel lines.
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Connect a multimeter with electrical current probe to wire of 4-pin connector terminal - 1 - - arrow - from wiring harness to Fuel Pump (FP) unit,
right.