Golf L4-2.0L (ABA) (1996)
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Bridge Test Box socket 49 to Ground using jumper wires from VW 1594 adaptor kit.
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pump motor must run and air must exit the pressure line.
If pump runs, but no air exits hose:
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Check pressure line, if necessary replace pump motor
If pump mot0r does not run:
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Disconnect pump motor harness connector
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Connect VAG 1 527B LED tester to disconnected connector using jumper wires from VW 1594 adaptor kit.
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LED tester must light-up.
If tester lights up (voltage supply OK):
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Replace pump motor
If tester does NOT light up:
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Check wiring between Test Box socket 49 and pump relay using wiring diagram.
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Check activation of relay and wiring to pump motor using wiring diagram
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Reconnect 2-pin harness connector.
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Check DTC memory, then erase.
Secondary Air Injection solenoid valve, Checking
Special Tools, Testers And Auxiliary Items
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WV 1594 adaptor kit
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VAG 1527B LED Tester
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US 8026 Hand vacuum pump
CHecking Requirement
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Vacuum hoses OK.
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Disconnect vacuum hose to solenoid valve at line to brake servo.
See Location Chart.
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Connect hand vacuum pump to vacuum hose.
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Disconnect Pneumatic valve vacuum hose at valve.
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Switch OFF ignition.
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Connect VAG 1598/18 Test Box to ECM wiring harness.
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Switch ON ignition.
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Bridge Test Box sockets 01 + 06 using jumper wires from WV 1594 adaptor kit.
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Operate hand vacuum pump.
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vacuum must build up (valve closed).
If Vacuum Does Not Build-up:
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Replace solenoid valve -2-
If Vacuum Builds Up:
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Connect Test Box socket 50 to Ground using jumper wires from WV 1594 connector test kit.
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valve must open.
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Operate hand vacuum pump.
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vacuum must not build-up (valve open).
If Vacuum Builds-up:
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Disconnect 2 pin harness connector from solenoid valve.
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Connect VAG 1527B LED tester to harness connector using jumper wires from WV 1594 adaptor kit.
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LED tester must light up.