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Passat Sedan V6-3.6L (BLV) (2008)

Powertrain Management > Fuel Delivery and Air Induction > Fuel Injector > Component Information > Testing and Inspection > Fuel Injector, Checking > Page 3505

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Fuel Injector: Testing and Inspection
Recirculation Pump, Voltage Supply, Checking

Diagnostic Procedures

Recirculation Pump, Voltage Supply, checking

The following test procedure is used to diagnose all fuel injectors. 

Special tools, testers and auxiliary items required

‹› Multimeter.

‹› Wiring diagram.

Test requirements

‹›  The Recirculation Pump Relay (J160) fuse OK.

‹› Battery voltage at least 12.5 volts.

‹› All electrical consumers such as, lights and rear window defroster, switched off.

‹› Vehicles with automatic transmission, selector lever in position " P" or "N".

‹› A/C switched off.

‹› Ground connections between engine/transmission/chassis OK.

‹› Ignition switched off.

Start diagnosis

-

Observe safety precautions. Refer to => [ Safety Precautions ] See: Computers and Control Systems/Service Precautions/Safety Precautions

-

Observe Clean Working Conditions. Refer to => [ Clean Working Conditions ] See: Computers and Control Systems/Service Precautions/Clean
Working Conditions

-

Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] See: Computers and Control Systems/Testing
and Inspection/Scan Tool Testing and Procedures/Preliminary Check.

Checking voltage

-

Switch the ignition on.

-

Using a multimeter, check for power at socket 3 (terminal 30) of Recirculation Pump Relay (J160) to chassis ground. 

Specified value: battery voltage.

-

Switch the ignition off.

If the specified value was not obtained:

-

Check the wiring connection from fuse 1 in Fuse Panel A (150 amp) to the Recirculation Pump Relay (J160) socket 3 (terminal 30) for an open
circuit or a short circuit.

-

Check the wiring connections for damage, corrosion, loose or broken terminals.

-

If necessary, repair the faulty wiring connection.

If the specified value was obtained:

-

Switch the ignition on.

-

Using a multimeter, check the Recirculation Pump Relay (J160) socket 1 (terminal 85) to ground.

Powertrain Management > Fuel Delivery and Air Induction > Fuel Injector > Component Information > Testing and Inspection > Fuel Injector, Checking > Page 3505

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