Workshop Repair Manuals

Volkswagen Workshop Manuals

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volkswagen Workshop Repair Guides


Jetta L4-1781cc 1.8L SOHC (ACC) Can (1995)

Sensors and Switches > Sensors and Switches - Powertrain Management > Sensors and Switches - Computers and Control Systems > Oxygen Sensor > Component Information > Testing and Inspection > Heated Oxygen Sensor (HO2S), Checking > Page 809

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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 

Disconnect Heated Oxygen Sensor (HO2S) harness connector at right engine mount.

Connect VAG 1527B voltage tester to harness connector using cables from VW 1594 adapter kit.

Start engine and let idle.
^  LED must light up 

If NOT:

Repair short/open circuit using wiring diagram.

Sensors and Switches > Sensors and Switches - Powertrain Management > Sensors and Switches - Computers and Control Systems > Oxygen Sensor > Component Information > Testing and Inspection > Heated Oxygen Sensor (HO2S), Checking > Page 809

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