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Diagnostický případ
Opravené vozidlo
AUTOKLINIKA
MIL light On – EGR
25.05.2017
1985x
Informace o vozidle
| VIN: | WVWZZZ6RZCY088071 |
| Výrobce: | Volkswagen |
| Model: | Polo |
| Rok výroby: | 2011 |
| Kód motoru: | 1,2 TDI CR |
| Typ motoru: | CFWA |
| Výkon (kW): | 55 kW |
| Převodovka: | Manuální |
| Palivo: | Diesel |
| Najeto: | 66 000 km |
Jak se závada projevuje
Nefunguje / funguje nesprávně. No fault symptom
Jak často se závada projevuje
- Trvale přítomná závada.
V jakém systému se závada vyskytuje
- Motoru.
- po startu motoru
- [P0405 (15536)] temperature sensor of EGR exhaust gases (G98) – signal too small
- trvalá závada
- sporadická závada
Doposud provedeno bez úspěchu
The following DTC sets into memory:15536 - teperature sensor of EGR exhaust gases (G98) - signal too small. I can't find this sensor anywhere. Unless its incorporated into the actual EGR valve body I would think that it's an incorrect translation.
Log recording was done during the actuator test. I think that the valve is working and the only point that I am not sure about is if the valves operating range is correct.
In the next step I connected an oscilloscope according to the schematic diagram shown in the Vivid Workshop Manual. According to this schematic diagram the motor contacts are on pins 5 (+) and 6 (-).
I dont know if the schematic diagram is incorrect or my judgment by in my opinion the 12 V duty-cycle is on pins 2 and 6.
After recording first log I cleaned the mechanical part with VD40 and with the help of the actuator test I tried to make the valve achieve a larger range of travel.
While recording a second log I noticed that the valve buzzing stops occasionally. This dropout is visible on the recording. I don't know if this could be caused by some sort of oscilloscope incapability.
Can I please have your opinion if the EGR valve is in a condition to be replaced.
