A4 Cabriolet L4-1.8L Turbo (AMB) (2005)
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Remove Secondary Air Injection (AIR) pump relay -2-.
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Connect multimeter for voltage measurement as follows.
Relay carrier in E-box,
Measure to
plenum chamber,
position 2
Terminal
8
Engine Ground (GND)
Specified value: approx. battery voltage
If specified value is not obtained:
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Check wire connection from B+ (terminal 30) via Fuse for secondary air pump -S130- to Secondary Air Injection (AIR) Pump Relay -J299- (in
relay and fuse carrier in E-Box, plenum chamber, position 3) for open circuit according to wiring diagram.
Specified value: Wire resistance max 1.5 Ohms
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Connect multimeter for voltage measurement as follows.
Relay carrier in E-box,
Measure to
plenum chamber,
position 2
Terminal
4
Engine Ground (GND)