A3 Quattro V6-3.2L (BUB) (2008)
Air Injection Pump Relay: Testing and Inspection
Secondary Air Injection Pump Relay, Checking
Special tools, testers and auxiliary items required
-
Multimeter.
-
Wiring diagram.
Test requirements
-
The Secondary Air Injection (AIR) Pump Relay -J299- fuses OK.
-
The Motronic Engine Control Module (ECM) Power Supply Relay J271 fuse OK.
-
Battery voltage at least 12.5 V.
-
All electrical consumers switched off (radiator fan must NOT run during test).
-
A/C switched off.
-
The ignition switched off.
Test procedure
-
Perform a preliminary check to verify the customers complaint. See: Computers and Control Systems/Testing and Inspection/Initial Inspection
and Diagnostic Overview/General Diagnosis
Start diagnosis
-
Remove the Secondary Air Injection (AIR) Pump Relay -J299-.
Checking voltage
-
Using a Multimeter, check the Secondary Air Injection (AIR) Pump Relay -J299- socket 3/27 to Ground (GND).
Specified value: battery voltage.
If the specified value was not obtained:
-
Check the wiring connections from the Battery to the Secondary Air Injection (AIR) Pump Relay -J299- socket 3/27 for an open circuit or a short
circuit.
-
Check the wiring connections for damage, corrosion, lose 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 Motronic Engine Control Module (ECM) Power Supply Relay J271 socket 2/87 to the Secondary Air Injection
(AIR) Pump Relay -J299- socket 1/25 for voltage.
Specified value: battery voltage.
-
Switch the ignition off.
If the specified value was not obtained:
-
Check the wiring connections from the Motronic Engine Control Module (ECM) Power Supply Relay J271 socket 2/87 to the Secondary Air
Injection (AIR) Pump Relay -J299- socket 1/25 for an open circuit or a short circuit.
-
Check the wiring connections for damage, corrosion, lose or broken terminals.
-
If necessary, repair the faulty wiring connection.
If the specified value was obtained:
Checking activation
-
Install the Secondary Air Injection (AIR) Pump Relay -J299-.
-
Switch the ignition on.
-
Using a Multimeter, check the Secondary Air Injection (AIR) Pump Relay -J299- socket 2/24 to Ground (GND)
-
Switch the ignition off.
Specified value: battery voltage.
If the specified value was not obtained:
-
Check or replace the Secondary Air Injection (AIR) Pump Relay -J299-.
-
Check the wiring connections for damage, corrosion, lose or broken terminals.
-
If necessary, repair the faulty wiring connection.
If the specified value was obtained: