DANA SPICER TM4 SUMO HP HV Powertrain, Troubleshooting Manual

Page: 104 / 192

104
Service Codes
TT21
Description
The Troubleshooting Tree 21 indicates an error where
one of the temperature sensors had a reading where
the temperature was higher than the allowed
maximum temperature and causes MCU defective
state.
Note : Refer to the MCU installation guide for more
details on installation and deinstallation procedure
including safety warning considerations.
Note
: There is air in the cooling circuit.
The air must be let out of the cooling
circuit.
Note : The flow of the cooling liquid is too
low to cool the motor. Refer to the cooling
system troubleshooting Guide.
Note : The temperature of the liquid
temperature is too high to cool the motor.
The system must turn Ignition off and the
coolant mixture must be replaced.
Note : The mixture of the cooling liquid
was done badly, which does not let the
coolant cool the motor. Replace the
mixture of cooling liquid. Refer to the
cooling system Service Manual.
Note : The wrong phase cable crimping on one or
more of the phase lugs. Replace the cable.
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
0x310D 0x310E
One of the
temperature sensors
of the IGBT went
over the limit and
caused the system to
go in a fault state.
1.
Air in the cooling circuit.
2.
Cooling liquid flow too low or nil
(cooling pump issue).
3.
Cooling liquid temperature too high
4.
Wrong cooling agent mixture used
–
(can create dust/rust in the cooling
circuit.
5.
Phase or DC loose contact point(s)
connection(s) on MCU.
6.
Wrong DC or phase cable crimping.
7.
Defective MCU.