Passat L4-1.8L Turbo (AWM) (2004)
Air Injection Pump: Testing and Inspection
With Generic Scan Tool
Secondary Air Injection (AIR) Pump Motor, Checking
Recommended special tools and equipment
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V.A.G 1526 portable multimeter or V.A.G 1715 multimeter
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V.A.G 1594 connector test kit
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Wiring diagram
Test requirements
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The respective fuses of Secondary Air Injection (AIR) Pump Motor -V101- must be OK
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Fuel Pump (FP) Relay -J17- must be OK, check
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Secondary Air Injection (AIR) Pump Relay -J299- must be OK, check:
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Battery voltage must be at least 11.5 volts.
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All electrical consumers such as, lights and rear window heating must be switched off.
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Ignition switched off.
Test sequence
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Remove front noise insulation.
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Disconnect 2-pin connector from Secondary Air Injection (AIR) Pump Motor -V101-.
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Disconnect pressure hose (arrow) between Secondary Air Injection (AIR) Pump Motor and connecting line.
NOTE: To disengage, compress the buttons at the hose coupling.
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Connect Secondary Air Injection (AIR) Pump Motor to the B+ and Ground (GND) terminals of the battery using the respective adapter cables.
The Secondary Air Injection (AIR) Pump Motor must start up and air must escape at compressed-air connection (arrow).
If the motor does not start up, or no air or only very little air escapes:
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Disconnect connection between Secondary Air Injection (AIR) Pump Motor and battery.
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Replace Secondary Air Injection (AIR) Pump Motor -V101-
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Erase DTC memory of Engine Control Module (ECM). Diagnostic mode 4: Reset/erase diagnostic data. See: Computers and Control
Systems/Testing and Inspection/Scan Tool Testing and Procedures/With Generic Scan Tool/Diagnostic Mode 4: Reset/Erase Diagnostic Data
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Generate readiness code. See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes