TCM monitors Battery voltage and power circuit usually, in order to maintain optimum condition of each sensors and solenoid-valve.
TCM set this code If battery voltage that supplied to TCM is out of available range.(MIL ON : 2 driving Cycle)
Item
Detecting Condition
Possible Cause
DTC Strategy
Check voltage range
Battery fuse
Open circuit Battery to TCM
Battery
Alternator
Enable
Conditions
CASE 1
Engine speed or Input speed > 1400rpm
Shift position level : N or P
or
Engine speed > 500rpm
CASE 2
CASE 3
Engine speed > 400rpm
Threshold
Value
ATF 70°C : Battery voltage < 7V
ATF 140°C : Battery voltage < 8.4V
Battery voltage < 9V
Battery voltage > 16V
Diagnostic Time
0.05second
2.5second
Fail Safe
High speed : fixed at 5th gear, low speed : fixed at 3rd gear.
Reverse : Shift lock(Push "Unlock button ? possible to shift)
(priority :3)
The function with the higher priority will aiways 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.
Fig 1) Battery voltage in Idle status