DANA TM4 SUMO MD MV, Troubleshooting Manual

Page: 59 / 182

59
Service Codes
TT07: Phase Current Sensor Deactivated
Description
Troubleshooting Tree 07 indicates that one phase
currents sensor(s) over three related phases are
deactivated, or are faulty.
The occurrence of the SysFile ID 0x0313 at the same
time of these SysFile IDs means it has to refer to the
Troubleshooting Tree TT03.
The low voltage due to DCDC or the auxiliary batteries
may raise to this SysFile ID.
The MCU itself may be defective.
Note: These warning indicates a fault with a particular
internal phase current sensor. An internal software
mechanism is put in place to ignore the reading of a
particular defective phase current sensor by
simulating its value according to the 2 other working
phase current sensors of the same 3 phase systems
keeping the system in operation.
If ever a fault occurs on another internal phase current
sensor, the system will go into fault reporting other
error types.
Note: Refer to the TT03 (SysFile ID 0x0313) entry for
the “Vaux too low” Event for Vaux Verification and
corrective actions (refer to steps in that TT03 tree that
comes after voltage measurement).
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
0x031A 0x031B
0x031C Phase current sensor
deactivated.
1.
If the 0x0313 SysFile occurred the same
time this can be the main cause.
2.
Defective DCDC system.
3.
Defective auxiliary batteries.
4.
Defective MCU.