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protective cover and disconnect downstream HO2S (G130) harness connector (brown 4-pin), see Fig. 19 . 6. Turn ignition off. Connect DVOM between terminals No. 3 and 4 of downstream HO2S harness connector, see Fig. 23 . Start engine, check ECM supplied basic voltage. Turn ignition off. Voltage 7. Turn ignition off. Disconnect ECM harness connector, leave ECM disconnected from test box. Connect Test Box (VAG 1598/31) to ECM harness connector. See CONNECTING VAG TEST BOX . Using z Downstream HO2S connector terminal No. 3 and test box socket No. 68. z Downstream HO2S connector terminal No. 4 and test box socket No. 69. 8. Resistance should be a maximum of 1.5 ohms for each reading. Check wiring in downstream HO2S 4-pin harness connector for short circuits to one another. If resistance measurements are okay and no short
2003 Volkswagen New Beetle GLS 2002-2003 ENGINE PERFORMANCE Self-Diagnostics - 1.8L Turbo
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