Q5 Quattro V6-3.2L (CALB) (2009)
‹› The voltage for the Secondary Air Injection Sensor 1 (G609) is supplied by the Motronic Engine Control Module (ECM) Power Supply Relay
(J271) OK.
-
Using a multimeter, check the Secondary Air Injection Sensor 1 (G609) electrical harness connector terminal 1 for voltage.
-
Operate the engine briefly.
Specified value: approx. 5 V.
-
Switch the ignition off.
If the specified value was not obtained:
-
Using a multimeter, check the Secondary Air Injection Sensor 1 (G609) electrical harness connector terminal 1 to the Motronic Engine Control
Module (ECM) (J623)terminal 53 for resistance.
Specified value: 1.5 ohms max
If the specification was not obtained:
-
Check the wiring for a short circuit to Battery positive (+) or an open circuit.
-
Check the electrical harness connector for damage, corrosion, loose or broken terminals.
-
If necessary, repair the faulty wiring connection.