P 502, drum not set

[The_man]

Firstly, suspected pcdu, swapped with working pcdu, still the same. Tried pcdu reset.
Fitted 2 new connetors, as tend to bend when forced.
Suspect bicu now, unless anyone had this.

[luca72]

Firstly, suspected pcdu, swapped with working pcdu, still the same. Tried pcdu reset.
Fitted 2 new connetors, as tend to bend when forced.
Suspect bicu now, unless anyone had this.

it is not to be excluded! but it could be the psu that does not provide the correct outputs, you can do a voltage and continuity test between CN442 (ID_CHIP PCDU) and CN100 (SCB) so you can also see if there is a mechanical problem of the contacts pcdu> mc
also check CN214 and CN215 on psu to verify the presence of voltage outputs (see attachment)

[The_man]

it is not to be excluded! but it could be the psu that does not provide the correct outputs, you can do a voltage and continuity test between CN442 (ID_CHIP PCDU) and CN100 (SCB) so you can also see if there is a mechanical problem of the contacts pcdu> mc
also check CN214 and CN215 on psu to verify the presence of voltage outputs (see attachment)

hi thanks for reply have fitted egb, ctrl and psu still the same, looking like a service swap out.