Jetta L4-1781cc 1.8L SOHC (ACC) Can (1995)
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Oxygen Sensor: Testing and Inspection
Oxygen Sensor Heating Circuit Power Supply, Checking
Heated Oxygen Sensor (HO2S) heating circuit power supply, checking
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Disconnect Heated Oxygen Sensor (HO2S) harness connector at right engine mount.
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Connect VAG 1527B voltage tester to harness connector using cables from VW 1594 adapter kit.
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Start engine and let idle.
^ LED must light up
If NOT:
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Repair short/open circuit using wiring diagram.
