P0605 Internal Control Module Read Only Memory (ROM) Error: DTC Detecting Condition

P0605 INTERNAL CONTROL MODULE READ ONLY MEMORY (ROM) ERROR

Item	Detecting Condition	Possible Cause
DTC Strategy	Check SUM	Mechatronics (Valve-body + T-CM)
Enable Conditions	"IG KEY" ON
Threshold Value	Different value of RAM calculated with EEPROM
Diagnostic Time	Immediately
Fail Safe	High speed : fixed at 5th gear, low speed : fixed at 3rd gear (priority :3)

CAUTION:

The function with the higher priority will always take precedence. However, a low-priority is not overruled by a higher priority function.
Functions from different priority categories can also run in parallel. It is important to note which function will take precedence in this case.
In such an event it is possible for a substitute function with low priority not be carried out if a second, higher-priority function is present. This has been taken into account when compiling the priority list and is international.
The mechanical emergency run function must always have the highest priority, since from the electrical standpoint it is the only safe condition.