Contents: Mono-Jetronic ↓ Examination ↓
Mono-Jetronic
A malfunction in the oxygen sensor adjustment is checked by interrogating the memory device for malfunction codes. Interrogate the memory device.
If the code 2 3 4 2 appears, then after this it is necessary to check whether the sensor has supply voltage.
Examination
Connect a tachometer or ask an assistant to read the readings from the instrument panel.
The original can be seen on the portal: www.VWmanual.ru
Start the engine and let it idle.
Disconnect the plug connector "1" of the oxygen sensor and, using a semiconductor diode lamp, check for the presence of supply voltage on both contacts of the plug (arrow). The LED should light.
Slowly increase the crankshaft speed. Up to a speed of 3700 rpm, the LED should light up, and above about 3700 rpm, it should go out. Otherwise, there is a relay defect in position 3 of the relay board or a wiring defect. Find the fault according to the wiring diagram and fix it.
After troubleshooting, erase the trouble codes from the memory device. Finally, perform a test drive for at least 10 minutes, then repeat the check.
Visitor comments