DANA TM4 SUMO MD MV, Troubleshooting Manual

Page: 107 / 182

107
Service Codes
TT21: Temperature Sensor reading over the limit
Description
The Troubleshooting Tree 21 indicates an error where
one of the temperature sensors had a reading where
the temperature was higher than the maximum limit
and causes MCU defective state.
Listed below are the possible artifacts of this error, in
order of likelihood:
1. The loss of the cooling circuit integrity. Refer
to the Sub Troubleshooting Tree STT02
Verify Coolant integrity of the motor and MCU
cooling circuit.
2. Connect TM4 ODIN to check if these SysFile
IDs occur again. If this is the case, the MCU
is defective. Turn Ignition OFF and all high
voltage electrical sources before replacing
MCU.
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 be turned 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.
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
Defective
0x310F 0x3110
One of the internal
temperature sensors
went over the limit and
caused the system to go
in a failure 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.
Defective MCU.