TT Quattro Coupe V6-3.2L (BHE) (2005)
Air Injection Pump Relay: Testing and Inspection
Secondary Air Injection Pump Relay, 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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FuseS131 OK.
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Fuse S234 OK.
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Fuel Pump (FP) Relay J17 OK.
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Battery voltage at least 12.5 V.
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All electrical consumers switched off (radiator fan must NOT run during test).
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A/C switched off.
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The ignition switched off.
Test procedure
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Perform a preliminary check to verify the customers complaint. See: Computers and Control Systems/Testing and Inspection/Scan Tool Testing
and Procedures/General Diagnosis
Start diagnosis
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Remove the Secondary Air Injection (AIR) Pump Relay J299.
Checking voltage
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Using a Multimeter, check the Secondary Air Injection (AIR) Pump Relay J299 socket 1/30 to Ground (GND).
Specified value: battery voltage.
If the specified value was not obtained:
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Check the Secondary Air Injection (AIR) Pump Relay J299 socket 1/30 to Battery A (+) for an open circuit or a short circuit.
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Check the electrical harness connector 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 Secondary Air Injection (AIR) Pump Relay J299 socket 3/85 to Ground (GND) for voltage.
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 Secondary Air Injection (AIR) Pump Relay J299 socket 4/86 to the Fuel Pump (FP) Relay J17 socket 19/86 for an open circuit or a
short circuit.
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Check the electrical harness connector for damage, corrosion, loose or broken terminals.
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If necessary, repair the faulty wiring connection.
If the specified value was obtained:
Checking wiring
If the manufacturers test box is being used. Perform the following step.
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Install the test box VAG1598/31.
If the manufacturers test box is not being used. Perform the following step.
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Remove the Motronic Engine Control Module (ECM) J220.
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Using a Multimeter, check the Secondary Air Injection (AIR) Pump Relay J299 socket 3/85 to the Motronic Engine Control Module (ECM) J220
electrical harness connector terminal 46 for resistance.
Secondary Air Injection (AIR)
Motronic Engine Control Module (ECM) J220
Pump Relay J299 socket
electrical connector terminal
terminal
or test box socket
3/85
46