Q7 Quattro V6-3.6L (BHK) (2007)
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Auxiliary Water Pump Relay: Locations
Recirculation Pump Relay J160, Checking
Special tools, testers and auxiliary items required
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Multimeter.
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Wiring diagram.
Test requirements
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The Recirculation Pump Relay J160 fuse OK.
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Battery voltage at least 12.5 volts.
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All electrical consumers such as, lights and rear window defroster, switched off.
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Vehicles with automatic transmission, selector lever in position "P" or "N".
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A/C switched off.
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Ground (GND) connections between engine/transmission/chassis OK.
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Ignition switched off.
Test sequence
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Remove the Recirculation Pump Relay J160.
Checking voltage
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Switch the ignition on.
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Using a Multimeter, check the Recirculation Pump Relay J160 socket 1/86 to Ground (GND).
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 Motronic Engine Control Module (ECM) Power Supply Relay J271 socket 2/87 to the Recirculation Pump
Relay J160 socket 1/86 for an open circuit or a short circuit.
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Check the wiring connections for damage, corrosion, lose 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 Recirculation Pump Relay J160 socket 5/87 to Ground (GND).
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 Motronic Engine Control Module (ECM) Power Supply Relay J271 socket 2/87 to the Recirculation Pump
Relay J160 socket 5/87 for an open circuit or a short circuit.
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Check the wiring connections for damage, corrosion, lose or broken terminals.
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If necessary, repair the faulty wiring connection.
If the specified value was obtained:
Checking activation
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Switch the ignition on.
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Using a Multimeter, check the Recirculation Pump Relay J160 socket 2/85 to the Engine Control Module (ECM) J623 electrical harness connector
T94 terminal 33 for voltage.
Recirculation Pump Relay
Engine Control Module (ECM)
J160 socket terminal
J623 Electrical harness connector T94 terminal or test box socket
4/85
33
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Switch the ignition off.
Specified value: battery voltage.
If the specified value was not obtained:
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Replace the Recirculation Pump Relay J160.
If the specified value was obtained:
