DANA TM4 SUMO MD MV, Руководство по устранению неисправностей

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Service Codes
TT01: SysFile Cleared
MCU power off
The
MCU shall indicate the status
“ReadyToPowerOff” before disconnecting power from
the Auxiliary vehicle battery (Vaux) via the CAN bus.
If the power is switched off before this status this
SysFile ID is raised. The SysFile will be cleared. The
result is loss of all the SysFile IDs recorded in the
MCU.
This SysFile ID means that the event log has been
cleared.
Description
This SysFile ID is raised if the MCU is switch off
before the “ReadyToPowerOff” state displayed.
It may be caused by a unit shut down where the MCU
did not go into the “READYTOPOWEROFF” state.
It might also occur when the MCU is defective.
If SysFile section was corrupted, the SysFile is
cleared. In this case, a followed warning (SysFile ID
0x000A) will indicate more detail upon nature of the
clearance of the SysFile. See Subtree TT02.
Note: A manual SysFile reset by an advance user can
also cause the SysFile to be cleared.
Note : On MCU shutdown sequence
The SysFile gets written in the unit EEPROM memory
upon a shutdown sequence. If the Vaux power (12 V
or 24 V) is removed before the MCU is in
« ReadyToPowerOff » state via CAN, the SysFile
section could possibly get corrupted and will be
cleared on the next power ON.
Note : Refer to the Dana TM4 Product installation
guide for more details on installation and
deinstallation procedure including safety warning
considerations.
Note : Refer to the TM4 CAN protocol document for
correct MCU shutdown sequence.
To correctly diagnose the faulty system, connect the
Diagnostic Tool (see «Diagnostics» section for test
equipment and descriptions) and follow the
troubleshooting tree procedure below.
See “Safety Warnings” and “Troubleshooting Tips”
sections for general guidelines on system diagnostics.
System Mode Referred by
SysFile ID Condition Possible Causes
ReadyToPowerOff 0x0000
Indicates that the event list
has been automatically
cleared.
Power off the Auxiliary
vehicle battery without a
“Ready to Power off CAN
state” of the Motor Control
Unit.
1. Wrong shutdown sequence. Auxiliary
vehicle battery (Vaux) (12V or 24V)
powered OFF before the MCU “Ready To
Power OFF” CAN status on a shutdown
sequence.
2. Defective MCU.