Jetta SportWagen L5-2.5L (CBUA) (2009)
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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
‹› Secondary Air Injection (AIR) Pump Relay (-J299-)fuses OK.
‹› Motronic Engine Control Module (ECM) Power Supply Relay (J271) fuse OK..
‹› Battery voltage at least 12.5 V.
‹› All electrical consumers switched off.
‹› A/C switched off.
‹› The ignition switched off.
Test procedure
-
Perform a preliminary check to verify the customers complaint. Refer to --> [ Preliminary Check ] 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 (relay terminal 30) to Ground (GND).
Specified value: battery voltage.
If the specified value was not obtained:
-
Check the wiring connection from the Secondary Air Injection (AIR) Pump Relay (J299) socket 1 (relay terminal 30) to the Battery (A) (+)
terminal for an open circuit or a short circuit to Ground (GND).
-
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:
-
Switch the ignition on.
-
Using a multimeter, check the Secondary Air Injection (AIR) Pump Relay (J299) socket 2 (relay terminal 87) to ground.
Specified value: battery voltage.
-
Switch the ignition off.
If the specified value was not obtained:
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Check the circuit from the Secondary Air Injection (AIR) Pump Relay (J299) socket 2 (relay terminal 87) through fuse 27 in Fuse Box B, out to
the Secondary Air Injection (AIR) Pump Motor (V101) connector, terminal 2 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.
