199002997 - 1080BI UPSTREAM LAMBDA SENSOR HEATER OPERATION CHECK
| CHECK TO BE PERFORMED | RESOLUTION IF THE CHECK IS NOT OK | |
|---|---|---|
| 1 | Turn the ignition key OFF.Disconnect the cable loom from the lambda sensor on the preconverterIn the engine bay junction unit, remove relay T6 (it is the first at the bottom in the middle row).Connect a shunt cable with a fuse between across pin 87 of the base unit for relay T6 and the battery positive.Measure the voltage between Pin 4 of the sensor and Earth, ensuring it is greater than 11 V. See K040 LAMBDA SENSORMove on to Step 3 | Move on to Step 2 |
| 2 | If faults are present, repair or if necessary replace the wiring between the junction unit and the lambda sensor See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT The test can be considered over | Replace the junction unit Op. 5505A13 ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R. |
| 3 | Disconnect the shunt connection.Disconnect the cable loom connector from the engine management control unit connector A.Turn the ignition key ON.Measure the voltage between Pin 3 (wiring side) of the sensor and earth is less than 0.3 V. See K040 LAMBDA SENSOR | Repair or if necessary replace the electrical wiring between the engine management control unit and the lambda sensor. See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT |
| 4 | Turn the ignition key OFF.Check that the resistance between Pin 3 (wiring side) of the sensor and earth is greater than 500 kOhms See K040 LAMBDA SENSOR | Repair or if necessary replace the electrical wiring between the engine management control unit and the lambda sensor. See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT |
| 5 | Measure the resistance between Pin 3 (wiring side) of the sensor and Pin 51 (wiring side) of the control unit is less than 5 Ohms See K040 LAMBDA SENSOR See M010 ENGINE MANAGEMENT ECU | Repair or if necessary replace the electrical wiring between the engine management control unit and the lambda sensor. See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT |
| 6 | Turn the ignition key OFF.Check that the resistance between Pins 3 and 4 (wiring side) of the sensor are between 1 and 20 Ohms See K040 LAMBDA SENSOR | Replace the Lambda sensor Op. 1080B90 LAMBDA SENSOR - R.R. |
| 7 | Replace the engine management control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R |