A3 L4-2.0L Turbo (CBFA) (2008)
Air Injection Pump Relay: Testing and Inspection
Secondary Air Injection Pump Relay, Checking
Observe all safety precautions.
View clean working conditions.
Use only gold-plated terminals when servicing any component with gold-plated electrical harness connector terminals.
For wiring diagrams, component locations, and connector views, Refer to the applicable wiring diagram.
Special tools, testers and auxiliary items required
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multimeter.
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Wiring diagram.
Test requirements
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Secondary Air Injection (AIR) Pump Relay -J299- fuses OK.
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Motronic Engine Control Module (ECM) Power Supply Relay J271 fuse OK.
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Battery voltage at least 12.5 V.
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All electrical consumers switched off.
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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/Preliminary Check
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 wiring connection from the Secondary Air Injection (AIR) Pump Relay J299 socket 1/30 to the Battery A (+) terminal for an open
circuit or a short circuit to Ground (GND).
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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 Secondary Air Injection (AIR) Pump Relay J299 socket 2/87 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 wiring connection from the Secondary Air Injection (AIR) Pump Relay J299 socket 2/87 to the Secondary Air Injection (AIR) Pump
Motor V101 socket 2 for an open 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:
Checking wiring
If the manufacturers test box is being used, perform the following step.
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Install the test box.
If the manufacturers test box is not being used, perform the following step.
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Remove the Engine Control Module (ECM) J623.
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Using a multimeter, check the Secondary Air Injection (AIR) Pump Relay J299 socket 3/86 to the Engine Control Module (ECM) J623 electrical