Rear parking sensors

Ok had no problems with the landie after it’s hic cup ( no power and all instrument lights on ) but way before that rear parking sensors continuous bleep when reverse selected no flashing light on switch. Checked for clicking on sensors all seem ok
I’ve changed ECU still the same anyone got any ideas thanks in advance , also what are the two relays behind ECU photo .going to pull the fuse soon driving me nuts

I'm assuming it's a Freelander 1?
A continuous tone from the PDC suggests a sensor is seeing something, or a ghost signal.

The relays are for the rear window IIRC.

Rear window and rear wiper relays.

Nodge68 said:

I'm assuming it's a Freelander 1?
A continuous tone from the PDC suggests a sensor is seeing something, or a ghost signal.

The relays are for the rear window IIRC.

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Cheers Nodge is it best to change a sensor until I find the bad one or all

DAVETHESLAVE said:

Cheers Nodge is it best to change a sensor until I find the bad one or all

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sorry yes it’s 2004 auto Freelander1 TD4 face lift model

DAVETHESLAVE said:

Cheers Nodge is it best to change a sensor until I find the bad one or all

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A decent diagnostic reader will tell you which sensor has failed, I'm sure my Delphi will pinpoint what sensor is giving trouble, even on the FL1.

DAVETHESLAVE said:

Cheers Nodge is it best to change a sensor until I find the bad one or all

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Not sure but can you unplug 1 sensor at a time to find 'faulty' item ? If you haven't got a reader.

When I do checking on my Freelander 1.
Ignition on no engine on then stick in reverse gear.
If a alarm sensor buzzing I am to near a wall or gate post or someone passing by if not I walk pass each one to test okay.

Andy Warren said:

Not sure but can you unplug 1 sensor at a time to find 'faulty' item ? If you haven't got a reader.

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Will have to take bumper off , unfortunately can’t get my fat hands anywhere near sensors

DAVETHESLAVE said:

Will have to take bumper off , unfortunately can’t get my fat hands anywhere near sensors

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Can you get to end ones by taking the bumper lamps out ?

Andy Warren said:

Can you get to end ones by taking the bumper lamps out ?

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No lamps in the bumper facelift model , someone said only takes 15 minutes to take bumper off might just pull the fuse and reverse properly

DAVETHESLAVE said:

No lamps in the bumper facelift model , someone said only takes 15 minutes to take bumper off might just pull the fuse and reverse properly

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My 04 facelift has the indicator & tail lights in the bumper see pic. (& p. sensor)

Andy Warren said:

My 04 facelift has the indicator & tail lights in the bumper see pic. (& p. sensor) View attachment 241870

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Tonga Green, they look good in Tonga.
From memory, the tail lamps have there own housing in the bumper, so access to the sensors is limited to underneath, or remove the bumper.

Nodge68 said:

Tonga Green, they look good in Tonga.
From memory, the tail lamps have there own housing in the bumper, so access to the sensors is limited to underneath, or remove the bumper.

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The paint code for mine on the n/s B pillar is 734 which I thought was Giverny Green ? Which I read somewhere was supposedly only for RR's of that time.
I did wonder if access to the outer two p. sensors might be a bit tight through the light unit but was worth a mention just in case you could trace it to one of the outer ones w/o having to remove the rear bumper.

Andy Warren said:

My 04 facelift has the indicator & tail lights in the bumper see pic. (& p. sensor) View attachment 241870

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Sorry my mistake didn’t realise they were part of the bumper