New Beetle L5-2.5L (BPR) (2007)
Air Injection Control Valve: Testing and Inspection
Generic Scan Tool
Diagnostic Procedures
Secondary Air Injection Solenoid Valve, Checking
Special tools, testers and auxiliary items required
‹› Multimeter.
‹› Wiring diagram.
Test requirements
‹› The Secondary Air Injection (SAI) Solenoid Valve ( -N112-) fuse 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. Refer to => [ Preliminary Check ] See: Computers and Control Systems/Testing
and Inspection/Scan Tool Testing and Procedures/Preliminary Check.
Start diagnosis
‹› Voltage is supplied to the Secondary Air Injection (SAI) Solenoid Valve (-N112-) from the Motronic Engine Control Module (ECM) Power
Supply Relay (J271).
Procedure
-
Disconnect the Secondary Air Injection (SAI) Solenoid Valve (-N112-) electrical harness connector.
Checking internal resistance
-
Using a multimeter, check the Secondary Air Injection (SAI) Solenoid Valve (-N112-) terminals 1 to 2 for resistance.
Specified value: 3.5 - 8.5ohms (at approx. 20 °C)
If the specified value was Not obtained:
-
Replace the Secondary Air Injection (SAI) Solenoid Valve (-N112-).
If the specified value was obtained:
Checking voltage supply
Switch the ignition ON.
-
Using a multimeter, check the Secondary Air Injection (SAI) Solenoid Valve (-N112-) electrical connector terminal 1 to ground for voltage.
Specified value: Battery voltage.
Switch the ignition OFF.
If the specified value was Not obtained: