DANA SPICER TM4 SUMO HP HV Powertrain, Troubleshooting Manual

Page: 121 / 192

121
Service Codes
TT29
Description
The Troubleshooting Tree 29 indicates a warning
where the sum of the phase currents of phases trios
1-2-3 and/or 4-5-6 are equal to or higher than the
maximum limit.
This SysFile may be raised by
“Warning - Vaux too
low” under the same « Info - System power up » as
« phase current reached the maximum ».
The MCU itself may be defective.
Note : Note on Vaux level too low.
If the Vaux level is too low, the current sensors used
for the phase current readings could saturate and
falsely interpret the current
Note : Refer to the MCU 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.
System Mode Referred by SysFile ID Condition Possible Causes
Operational
0x3203 0x3207
The phase 1-2-3
and/or 4-5-6, current
sum reached the
maximum limit.
1.
The auxiliary vehicle battery not operating
correctly.
2.
Intermittent or bad Vaux connection at the
MCU.
3.
Vaux Fuse about to open or more
resistive.
4.
Defective MCU.