Parking Sensor

[stanstag]

Hi again. So I exchanged my parking sensor module and now the thing makes no noise at all! With the old module in the light on the switch flashed and it bleeped for a few seconds. With the replacement module in there is no light and no noise. Any ideas what the problem could be? Could it be anything other than the module?

[chrispb123456]

You really need to scan with vagcom as this will pinpoint the problem, was this a new module or a secondhand one.

My guess is you got a secondhand one that is U/S.

The flashing light is telling you there's a fault on the parking sensor circuit which could be a simple wiring fault at one of the bumper sensors or one or more faulty bumper sensors.

[stanstag]

Yeah it was a working second hand module. Why would it not work on another vehicle? What's U/S by the way?

[chrispb123456]

Had you actually seen this module working yourself? reason I ask is they are prone to getting wet under the seat when the rear washer pipe comes apart and floods the module.

U/S is short for unserviceable, which could also be said to be knackered, broken, or f******.

[stanstag]

No I hadn't seen it working. Got it from used parts place who told me it was working. It worth plumping for a new one then you think? Non of the sensors are working, front or back so I can't see it being them that are dodgy. Where is this washer pipe? I can't see it in the well under the seat?

[Mr Tele-Com]

Hi Stan Stag

 

i am new to working on cars in any way but recently pciked up a 2002 Galaxy 2.3 with similar issues

 

When in reverse the Parking light falshes and you hear a sounder from the back of the car for around 2-4secs

BUT when revesing or moving forward none of the sensors seem to work and there isnt any notification we are getting close to a wall etc

 

under the passenger seat if the control box which i undernd are prone to water leak from ford place a joint to the back washer in the same area

not only that the screw the circuit board to the floor when you have loads of room

 

i took out the circuit boards, looks clean, plugged everything together but spaced it so it was around 3 inches off the base so its less chance of getting wet if there is a leak

 

with the engine running i can hear all 4 of my sensors clicking at the front but only 2 of the 4 at the back are clicking

i also understand by readinging round it could be the following

 

1 - Faulty Buzzer

2 - Faulty Sensors

3 - Faulty Wiring to the sensors maybe on the back of the bumper

4 - OR faulty circuit board

 

im going to check the wiring on the back on the sensors tomorrow when its dry

not sure if this helps

[glyndwr]

hi Mr Tele-Com iv got the same problem as you i was told that their is a plastic arm coming of the clutch and that could be broken

[MadBaz]

When the button is pressed/reverse selected, a flashing light and the rear speaker sounding for 3 seconds indicates a fault. It only takes one sensor or any of the sounders to be faulty for the whole system to be put into a fault state. The easiest way to diagnose is with VCDS Lite (Vagcom). There is no signal from the clutch switch to the parking module.