TT Quattro Roadster L4-1.8L Turbo (AMU) (2002)
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Secondary Air Injection (AIR) pump relay -1- (under cover, left at bulkhead) must trigger and the Secondary Air Injection (AIR) pump motor
-V101- must run in intervals. The relay -2- need not be observed in this context (it is involved supplying voltage for the Motronic ECM power
supply relay -J271-)
A -
If relay does not trigger:
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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 -
If relay triggers, but Secondary Air Injection (AIR) pump 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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Switch ignition off.
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Remove Secondary Air Injection (AIR) pump relay -1-.
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Connect multimeter for voltage measurement as follows (left relay carrier):
Relay carrier below left cover,
Measure to
at bulkhead
Terminal
1
Engine Ground (GND)
NOTE: Socket allocation of the relay carrier is printed on the relay carrier itself.
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Specification: approx. battery voltage
If specified value is not obtained:
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Perform the following tests marked with dots: