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Code
Alarm
220
KEY OFF
SHORTED
ACQUIRE JOY1
MOTOR
LOCKED
221
FLASH
CHECKSUM
MICRO
SLAVE #4
222
SMART DRIVER
KO
Pump
EPS
Traction
(P)
(E)
(T)
Description
Cause :
This fault is displayed when the controller detects a low
logic level of Key-Off signal during Start-Up diagnosis.
Troubleshooting :
It is very likely the fault is due to an under voltage, so it is
suggested to check :
A)
Key input signal down-going pulses (below under
voltage threshold) due to external loads, like DC/DC
converters starting-up, relays or contactor switching,
solenoids energizing / de-energizing.
B)
Check the connection of power cables to the battery
terminal, positive and negative, to MC and to
controller +Batt and .Batt, which must be screwed
with a torque comprised in the range 5,6Nm÷8,4Nm.
C)
If no voltage transient is detected on the supply line
and the alarm is present every time the key is
switched ON, the failure is probably in the controller
hardware, so it is necessary to replace the logic
board.
Not managed by this software.
This alarm occurs if the current in the steering motor
stays higher than 90% of the maximum current longer
than 1 sec. Search for a mechanical problem locking the
motor. To make easier the fault catching, set DEBUG
OUTPUT to level 11.
Cause :
The software was not correctly written into the flash
memory or the flash memory is damaged.
Troubleshooting :
This type of fault is not related to external components,
replace the controller.
It occurs in one of the following conditions : If the slave
uC detects the stator voltage phasor rotates in the
opposite direction respect to the sign of the stepper
motor speed, this alarm occurs. (i.e. slave uC detects the
actual sign of the frequency in the motor opposes the
sign that the frequency should have according the
command). It is necessary to replace the controller.
Cause :
The built in smart driver is open, not able to provide the
electro mechanic brake positive.
Troubleshooting :
A)
It is suggested to check the harness, in order to verify
if the Smart driver output CNA#2 is shorted to -Batt.
B)
If, even disconnecting the wire from the connector pin,
the output stays at low value, the problem is inside the
controller and the Smart Driver is probably damaged.
7-85
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