DANA SPICER TM4 SUMO HP HV Powertrain, Troubleshooting Manual

Page: 37 / 192

37
Service Codes
TT02
Description
The Troubleshooting Tree 02 indicates that a MCU
EEPROM memory section corruption is detected
when MCU is started up. This is discovered through
the verification known as Cyclic Redundancy Check
(CRC), which detects whether a MCU EEPROM
memory section is corrupted.
These SysFile IDs indicate a minor issue if other
subsequent System power-up are shown in the
SysFile history.
It may also be caused by a MCU that was switched
OFF on a previous power up before the
“ReadyToPowerOff” CAN status on a shutdown
sequence.
Note :
•
Vaux must be permanent through a fuse for a
successful shutdown sequence.
•
Corruption of EEPROM section may occur upon
writing while power (Vaux) is removed.
Note
: Refer to the TM4 Product installation guide for
more details on installation and deinstallation
procedure including safety warning considerations.
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.
Related Process
The TT02 call the following process:
•
Appendix 3: Save EEPROM Sections .
System Mode Referred by SysFile
ID Condition Possible Causes
At start up 0x000A 0x1300 0x4209
MCU memory section
corruption detected.
1. Wrong previous shutdown sequence.
Auxiliary vehicle battery (Vaux 12V or 24V)
powered OFF before the MCU
“ReadyToPowerOff” CAN status on a
shutdown sequence.
2. Defective MCU.