TROUBLESHOOTING
False beeps or constant tone
If the system after installation has any kind of false beeps you need to go through the following check list.
Important:
make sure no objects are within a 2.5 meter range of the sensors and the vehicle is on a level surface
before doing the following tests.
Before doing the following check list check the High/Low adjustment if fitted on your CPU: Turn the High/Low
adjustment fully anticlockwise and see if the beeps stop, also try fully clockwise. The home position is in the centre.
1) Power feed: Check the power feed is stable and at the correct voltage. Taking power off CAN circuits can cause
an issue in parking sensor stability. Check for a good earth.
2) Sensor head orientation: Check the sensor heads are in the correct orientation and in the up position. (There
is an up indicator mark on the back of the sensor) and fitted in the required level position, neither pointing up or
down.
3) Sensor head fit: Check they are not fitted too tightly in the hole or being squashed and the cable has a clean exit
from the back of the sensor and is not pressing against metal or plastic and are not fitted on metal (Unless using
rubber sensor).
4) Cables. Check cables are secure and not crushed or have a tight turn/kink.
5) Connections. Try removing the plugs and re-inserting. Check all connections are pushed in firmly.
6) Control Box. Make sure control box is seated firmly and not damp or wet.
7) Paint: Make sure there is not too much paint on the sensor if self painted.
8) Water / Debris: Make sure there is no water or debris trapped in the sensor ring. clean with small brush and use
silicon spray and wipe off excess to help repel water.
9) Wiring: Check that the sensor cables are wired correctly. A/B/C/D, If not using display you can also try swapping
sensors round ABCD - DCBA at the control box.
10) Dip switch: Make sure the dip switches have been selected correctly.
Switch 1, Anti-hook function. For using when vehicle has rear mounted spare wheel or tow hitch.
Switch 2, A/D sensor range. Reduces detection range of outer two sensors C/D.
If the above fails try the following:
1) CPU: Replace CPU.
2) Sensor heads: Replace sensor heads 1 by 1 and test on each change.
3) Power feed: Isolate power feed using relay or ideal CAN power device. Some vehicles do not like devices directly
connected to the lighting circuit. Alternatively you can use our PSPK4 CAN interface that provides a 12v live on
reverse to isolate the sensors from the lighting circuit.
System is not working.
Check power feed at both ends of the power cable.
Check fuse for circuit the control unit is connected to.
Check if sensors are working (See page 8).
Power up beeps.
If you get the standard power up beep and then a further beep or beeps this may be referring to an issue with a
sensor.
I.E
BEEP, BEEP then BEEEEEP This would refer to sensor 1 having a possible fault
BEEP, BEEP then BEEEEEP BEEEEEP This would refer to sensor 2 having a possible
fault.
Page 7
Summary of Contents for PS440
Page 4: ...WIRING Page 2...
