PAS alarm method

Obstacle are detected by PAS, It alarms driver through the hearing and visual device. But, PAS ECU transmits alarm data to CLUSTER by LIN communication and cluster starts to show visual alarm through alarm data.

PAS alarm sound specification.
In the state of IGN ON, and PAS or RPAS turn active, System will do work as below.

Fig 1: PAS Alarm Signal Waveform
Courtesy of KIA MOTORS AMERICA, INC.

If Front system and Rear system has common operational condition (3.1 reference), MICOM checks every sensor and if it finds no fault, after 500ms sends the initial starting Sound for 300mS (But, initial starting sound works not PPS but only under the RPAS system But, if it finds any defect, it sends fault sound and show fault sensor through INDICATOR.
- In Front system, initial starting sound doesn't work but in case PAS sensors have any fault sends fault sound and shows through INDICATOR under the PAS ON condition.
- Acceptable wave error range ±10%
Alarm sound output spec by the distance
Rear buzzer alarm sound

Fig 2: Rear Buzzer Alarm Sound Signal Waveform
Courtesy of KIA MOTORS AMERICA, INC.

Front buzzer alarm sound

Fig 3: Front Buzzer Alarm Sound Signal Waveform
Courtesy of KIA MOTORS AMERICA, INC.
NOTE:
1. Acceptable wave error range: ±10%
2. Under 30Cmm area, alarm sound could not work.
3. By the Vehicle moving and target shape, distance alarms could not be in order.
4. Alarm sound comes from CLUSTER and period and alarm lasting time of alarm could be changed.

INDICATOR display method.

When the System starts, CLUSTER controls INDICATOR according to alarm data like below. If it finds any obstacle, lights immediately, and doesn't find anything, Front System do nothing but Rear System lights INDICATOR as a nothing alarm for 2 seconds after 'R' gear and turns off (If it senses obstacle and then has no obstacle, it lights INDICATOR as a nothing alarm and turns off)

PAS(FRONT, REAR ALARM SYSTEM) INDICATOR DISPLAY

Alarm Step	Nothing alarm	1 alarm(lighting) (61Cm ~ 100Cm)	2 alarm(lighting) (31Cm ~ 60Cm)	3 alarm(lighting) (under 30Cm)
INDICATOR display

RPAS(Rear Parking Alarm System) INDICATOR Display

Alarm Step	Nothing alarm	1 alarm(lighting) (61Cm ~ 100Cm)	2 alarm(lighting) (31Cm ~ 60Cm)	3 alarm(lighting) (under 30Cm)
INDICATOR display

NOTE: It displays the position of detected obstacle. Front sensor has no 1 step alarm display(sensing area under 60Cm)Front system has no alarm sound but only display in 2 step alarm. 3 step alarm turns on/off 1 sec cycle(0.5sec ON, 0.5sec OFF)If Front system and Rear system release the operational condition, cluster stops the INDICATOR display and alarm sound immediately. (within 230ms)

INDICATOR LIGHT CONTROL

	Front PAS SYSTEM	Rear Front PAS SYSTEM
System starting(no obstacle)	NO INDICATOR	Display nothing alarm for 2 seconds
System starting (obstacle)	Turn INDICATOR on immediately by the distance	Turn INDICATOR on immediately by the distance
Alarm released	Display nothing alarm for 2 seconds	Display nothing alarm for 2 seconds
System operational released	Released immediately	Released immediately

When alarm is working on and released, or nothing alarm, if system operational condition released, display and alarm sound stop immediately.
In releasing alarm condition, INDICATOR lights turns off within 230ms.

PAS ECU and CLUSTER alarm data process.

Cluster response the alarm data from PAS ECU and lights INDICATOR. If it needs alarm delay or INDICATOR light delay, it controls the alarm data as below.

Alarm data status	Data control	remark
1, 2, 3 level alarm data send	PAS ECU	Cluster response 1, 2, 3 level alarm data immediately from PAS ECU
After 'R'Gear, no alarm and after 1, 2, 3 level alarm, no alarm	CLUSTER	Cluster display nothing alarm for 2 seconds after sending 1, 2, 3 level alarm sound, if cluster get no alarm data from PAS ECU.
In obstacle gets far, alarm data delay	PAS ECU	PAS ECU has 1sec alarm delay when the obstacle gets far or alarm is released after entering the alarm process.

But recognize R Gear starting point from the initial sound data that comes from PAS ECU.

Self diagnosis and fault alarm specification.
System starts to fault alarm when it finds PAS sensor fault.

PAS Sensor fault type is as below.
1. Sensors fault.
2. Sensor signal line OPEN of SHORT to GROUND Error diagnosis is performed by the error time and error type.
Error diagnosis is performed by the error time and error type.
1. Fault diagnosis by the fault time.
  1. On System starting → Display the INDICATOR after inform the fault sensor through the alarm sound(sensor circuto open or GROUND SHORT).
  2. On the normal operation, fault occurs (including the fault releasing and normal operation) → No fault alarm, just INDICATOR show the fault sensor.
2. Fault diagnosis by Fault type.
  1. Sensor fault (sensor circuit fault or sensor cell breakdown)→ INDICATOR displays that fault.
  2. Sensor WIRE fault (OPEN or GROUND SHORT)→ INDICATOR displays that fault.
  3. Sensor drive device of ECU fault→ INDICATOR display as if the sensor has a fault.
Sensor fault alarm sound output specification.
In system initial starting, if it has fault sensor, it sounds as below.

Fig 4: Sensor Fault Alarm Sound Output Signal Waveform
Courtesy of KIA MOTORS AMERICA, INC.
- Acceptable wave error range: ±10%
- After sensor fault alarm sound are sent, the other sensors work normally.
- There is no fault alarm when the fault occurs during working normally.
- Alarm sound comes from CLUSTER and period and alarm lasting time of alarm could be changed (If it has any changes, cluster firm must notify Body Control Design team and Chassis Safety control team and MOBIS of changes)

Sensor fault display method.

Alarm level	0.5sec lighting	0.5sec off
INDICATOR display

Indicator lights only Fault sensor and when the sensor fault is released, faulty display will be disappeared. But, it is supposed to display the fault when it occurs on the work.