P1645

2B99 - P1645

Information saved in
DME

Fault code
2B99 - P1645

Fault text
DME2: Control unit, bank 2, internal fault: RAM backup

Fault description
Control module, internal fault: RAM backup

Condition for fault identification
Test condition:
Attempt to read NVRAM backup to/from flash-
programming module was not successful.
During initialization a byte is transmitted back via the BIOS
function request 'getEeePageStatus(page_index)'.
An alarm-hiding screen is generated from the status
information data PAGE_INI, PAGE_READ and shown with
the return value from the BIOS function
'getEeePageStatus'. If the status information is not equal to
zero, a read error has occurred.
Terminal condition: Terminal 15=TRUE
Voltage condition:
9.5 < U < 17.9

Condition for fault memory entry
none

Action in service
Replace DME

Fault effect and breakdown warning
none

Driver information
Warning light:
none

Service instruction
none