- Secondary air pump relay -J299 activates secondary air pump motor -V101 which runs at intervals until the final control diagnosis is terminated by pressing the⇒key.
If secondary air pump motor -V101 does not run at intervals:
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‒ Pull 2-pin connector off secondary air pump motor and connect diode test lamp V.A.G 1527 to disconnected connector using auxiliary cables from V.A.G 1594.
If the diode test lamp now flashes during final control diagnosis:
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‒ Renew secondary air pump motor -V101.
=> Repair group 26; Secondary air system; Removing and installing parts of secondary air system
Note:
The secondary air pump relay is located in the electronics box in the plenum chamber.
If diode test lamp does not flash and secondary air pump relay does not click, test activation of secondary air pump relay
.
If diode test lamp does not flash but secondary air pump relay clicks, test voltage supply for secondary air pump relay.
Testing voltage supply for secondary air pump relay
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‒ Check fuse for secondary air pump relay -J299.
=> Current flow diagrams, Electrical fault finding and fitting locations binder
If the fuse is not faulty:
Note:
The secondary air pump relay is located in the electronics box in the plenum chamber.
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‒ Remove secondary air pump relay from relay carrier.
=> Current flow diagrams, Electrical fault finding and fitting locations binder
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‒ Test voltage supply (positive 30) for relay.
=> Current flow diagrams, Electrical fault finding and fitting locations binder
If no faults are found in the voltage supply for the relay, fit a new secondary air pump relay -J299.
Testing activation of secondary air pump relay
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