Touareg V6-3.2L (BMX) (2005)
If the 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 current consumption of fuel pumps --> [ Current Consumption, Checking ].
Current Consumption, Checking
Check the Left Fuel Pump Current Consumption
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Reconnect all disconnected fuel lines.
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Connect the multi meter (V.A.G 1715) current clamp to the 4-pin connector contact wire - 1 - - arrow - on the wiring harness to the left fuel
delivery unit.
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Start the engine and run at idle speed.
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Measure current draw of fuel pump. Specified value: max. 11 amps.
‹› If malfunction in fuel system is sporadic, test can also be performed during a road test, but a second person is required.
If the current draw is exceeded:
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Left Fuel Pump (FP) malfunctioning, replace fuel pump unit--> [ Fuel Delivery Unit, Fuel Level Sensor and Suction Jet Pumps ] See: Service and
Repair.
Check the Right Fuel Pump Current Consumption
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Connect current clamp of multi meter (V.A.G 1715) to the wire of the 4-pin connector contact - 1 - - arrow - from wiring harness to right fuel
delivery unit.