P0A3B

278C - P0A3B

Information saved in
DME

Fault code
278C - P0A3B

Fault text
Alternator

Fault description
Generator Over Temperature

Condition for fault identification
Test condition:
B_genfht transmitted by alternator or B_genhtkrit or
B_tdiodekrit set by model PGENTRED
Terminal condition: TERM87
Voltage condition:
none

Condition for fault memory entry
25000 ms

Action in service
1. Check alterantor to ensure unobstructed air flow
2. Carry out alternator diagnosis
3. Replace alternator

Fault effect and breakdown warning
Driver does not notice.

Driver information
Warning light:
none

Service instruction
none