144 | © Danfoss | August 2018 AQ00000211
Category SPN Signal Name Failure mode
Severity
CAN messages 520228 WAS CAN sensor
never received (boot-up
timeout)
- Message missing Severe
WAS CAN Bus not connected
3. Incorrect parameter setting of WAS source address or PGN
message lost (timeout)
- Abnormal update rate Severe
1. WAS lost CAN bus or power connection
2. Wrong message timing
invalid CRC or message
sequence
19 - Received network data in
error
Severe
1. CAN bus disturbance
2. Incorrect WAS message implementation
invalid position value
2 - Data erratic, intermittent or
incorrect
Severe
WAS data out of range
Signal exceeded calibration
limit
- Out of calibration Severe
1. Wheel angle sensors are not calibrated properly.
2.
Vehicle geometry has changed and it is now possible to steer the wheels
further than the calibrated max points.
3. Mechanical link integrity lost
Safety
Functions
520203
Vehicle speed triggered EH-
steering shut-off (Safety
Vehicle speed too high
- Condition exists Severe
Vehicle speed is higher than the specified threshold specified by P3253
Safety
Functions
520204 EH-main spool monitoring
EH spool position greater
than set-point
7 - Mechanical system not
responding or out of adjustment
Severe
1. EH-Spool out of control
EH spool moved without
steering input
- Unintended Steering Severe
1. SASA disconnected from OSPCX in EHPS system
Not in neutral at startup
- Not in neutral at Power-up Severe
EH-Spool not in neutral at startup
Safety
Functions
520205
Fault Detection Algorithm
Monitoring
Unintended steering
- Unintended Steering Severe
1. Improper sensor parameter setup
2.
Chock valves have been open
Wheel angle sensor detached
SASAIID sensor detached from steering column
Improper calibration of wheel angles
6. Change in spool calibration values
Safety
Functions
520206 Safe ON-Road Monitoring
Switch stuck closed
- Stuck Closed Severe
1. Road switch relay failure (relay is not able to disconnect load)
Switch state undefined
2 - Data erratic, intermittent or
incorrect
Severe
1. AD3 Road switch signal in undefined range
Switch state missing
- Message missing Severe
AD3 Road switch signal not able to stabilize within valid range during
Switch state crosscheck
failed
- Signal crosscheck failed Severe
Internal failure
If P3072 = 0 & P3242 = 255:
Mismatch in Road switch states between DOUT resistance and AD3
Safety
Functions
520207
Road switch resistance
monitoring
Switch state undefined
- Data erratic, intermittent or
Severe
DOUT Resistance in invalid range
Switch state missing
- Message missing Severe
1. DOUT Resistance not able to stabilize within valid range during
initialization
Switch state crosscheck
failed
- Signal crosscheck failed Severe
1. Mismatch in Road switch states between DOUT resistance and AD3
voltage signal
Safety
Functions
520208 Demanded safe state externally triggered safe state
- Condition exists Severe
1. Controller forced to safe state by peer controller via SPI. This happens for
example when one of the controllers detects a failure, which the other
controller is not capable of detecting
Diagnostic
functions
520210 Cut-off solenoid
unable to supply pilot flow to
PVED
- Stuck Closed Severe
1. No/insufficient Pump pressure
unable to cut pilot flow to
- Stuck Open Severe
Internal hydraulic failure in OSPE/EHi
Synchronization failed
19 - Received network data in
error
Severe
Diagnostic
functions
299023 Coils Supply Switch
Self-test failed
12 - Bad intelligent device or
component
Severe
Safety switch state not in
sync with operation
2 - Data erratic, intermittent or
incorrect
Severe
Synchronization failed
19 - Received network data in
error
Severe
Diagnostic
functions
520211 Overvoltage supervisor
Self-test failed
12 - Bad intelligent device or
component
Severe
Synchronization failed
19 - Received network data in
error
Severe
520582 +5V +5V signal out of range
2 - Data erratic, intermittent or
incorrect
Severe
Internal
Hardware
298967 CAN bus
CAN bus off and recovered
- Received network data in
Severe
1. CAN bus disturbance
2.
No/insufficient termination on the CAN bus network
3. Shortcut or wire breakage on CAN bus wire
Address arbitration lost
- Unknown root-cause Severe
Address conflict on the CAN bus
Internal CAN Rx buffer
overflow
12 - Bad intelligent device or
component
Severe
Excessive number of messages intended for PVED CLS
Internal CAN Tx buffer
overflow for CAN priority 3
(safety related messages)
0 - Data valid, but above normal
operational range
- Most severe
Severe
Excessive number of Priority 3 messages
overflow for CAN priority 6
15 - Data valid, but above normal
operating range
- Least severe
INFO
Excessive number of Priority 6 messages
299029 EEPROM
Verified write fails on
- Bad intelligent device or
Severe
Internal
Hardware
520212 LVDT sinus signal
LVDT sinus frequency out of
range
- Abnormal frequency or pulse
period
Severe
520585 Vref generation Vref signal out of range
2 - Data erratic, intermittent or
incorrect
Severe
520586 GND level GND level above upper limit
3 - Voltage above normal or short-
circuit to high source
Severe
520588 LVDT demod A
LVDT demo A signal out of
range
2 - Data erratic, intermittent or
incorrect
Severe
520589 LVDT demod B
LVDT demo B signal out of
range
2 - Data erratic, intermittent or
incorrect
Severe