Touareg 2 V6-3.6L (BHK) (2008)
After-Run Coolant Pump: Testing and Inspection
Recirculation Pump, Voltage Supply, Checking
The voltage supply for the Recirculation Pump (V55) may be supplied by either the Recirculation Pump Relay (J160) or the Residual Heat Relay
(J708)
Special tools, testers and auxiliary items required
‹› Multimeter.
‹› Wiring diagram.
Test requirements
‹› The Residual Heat Relay (J708) 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 (GND) connections between engine/transmission/chassis OK.
‹› Ignition switched off.
Test procedure
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Perform a preliminary check to verify the customers complaint. Refer to --> [ Preliminary Check ] See: Powertrain Management/Computers and
Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Preliminary Check
Start diagnosis
Checking voltage
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Switch the ignition on.
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Using a Multimeter, check for power at Pin 1 of V55 and chassis ground.
Specified value: battery voltage.
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Switch the ignition off.
If the specified value was not obtained:
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Check the wiring connection from the Plus 30 Terminal Connection (SB2 Fuse Panel B) to the Residual Heat Relay socket 3/30 for an open circuit
or a short circuit.
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Check the wiring connections for damage, corrosion, loose or broken terminals.
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If necessary, repair the faulty wiring connection.
If the specified value was obtained:
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Switch the ignition on.
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Using a Multimeter, check the Residual Heat Relay socket 1/86 to Ground (GND).
Specified value: battery voltage.
-
Switch the ignition off.