S4 V8-4.2L (BHF) (2004)
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Secondary Air Injection (AIR) Pump Relay at position 2 (in 3-pin relay carrier, E-box plenum chamber) must engage and Secondary Air
Injection (AIR) Pump Motor -V101- must run
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Switch ignition off.
A. Secondary Air Injection (AIR) Pump Motor runs.
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Check voltage supply of the Secondary Air Injection (AIR) pump relay
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Check activation of the Secondary Air Injection (AIR) pump relay
B. Secondary Air Injection (AIR) Pump Motor does not run.
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Check voltage supply of the Secondary Air Injection (AIR) pump motor
Checking voltage supply of Secondary Air Injection (AIR) pump relay
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Remove Secondary Air Injection (AIR) pump relay from position 2 in 3-pin relay carrier, E-box, plenum chamber.
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Connect multimeter for voltage measurement as follows.
3-pin relay carrier, E-box plenum chamber, position 2 Terminal
Measure to
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
3-pin relay carrier, E-Box, plenum chamber, position 2) for open circuit according to wiring diagram.
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Specified value: Wire resistance max 1.5 Ohms