DANA TM4 SUMO MD MV, Руководство по устранению неисправностей

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109
Service Codes
TT22: EMI Temperature measurement over limit
Description
The Troubleshooting Tree 22 indicates an error where
an internal temperature sensor had a reading which
was greater than the limit, and causes MCU defective
state.
Listed below are the possible artifacts of this SysFile
ID, 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. There are signs of burnt spots on the MCU
contacts and on the phase cables. Or, the
wrong torque was used on one or more of the
phase lugs, and / or, the wrong phase cable
crimping on one or more of the phase lugs.
3. 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 turn Ignition
off and the coolant mixture must be replaced. Refer to
the cooling system Service Manual.
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
Defective
0x3112
The internal EMI section
temperature
measurement 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.
Wrong torque applied to one or both DC
lugs.
6.
Wrong DC cable crimping.
7.
Defective MCU.