| STEP | CHECK TO BE PERFORMED | IF THE CHECK IS NOT OK |
|---|
| 1 | WIRING CONTINUITY CHECK- Connect disconnector AD-456 n° 1806590000 between the cable loom coming from the engine management control unit and the Lambda sensor and check the continuity of the wiring between the sensor and the engine management control unit
| Repair or, if necessary, replace the wiring between the engine management control unit and the Lambda sensor See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT |
| 2 | CHECK ON THE WIRING INSULATION- Check that the wiring is correctly insulated to earth
| Repair or, if necessary, replace the wiring between the engine management control unit and the Lambda sensor See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT |
| 3 | CHECK ON HEATER RESISTANCE POWER SUPPLY- Turn the ignition key to the ON position
- Check that the voltage between pin 4 and the earth is about 12 Volt
| Restore correct power supply See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT |
