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scotty57

Member

• Jun 11, 2015

• #1

The HDC warning light on my 55 plate has come on. On ignition it comes on with all the other warning lights and when the engine is started it goes off. Once I start to move, forward or reverse, it comes on. Sometimes after 50 yards, sometimes after half a mile - then stays on.

I've searched the archive to see what other folk have done. My brake lights work perfectly and the TC & ABS warnings do not come on. I changed the brake switch for a new one from a local LR independent as for £10 it could have been a cheap fix.

What else could it be & how do I check the HDC switch is not faulty ?

 

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td4van

Well-Known Member

• Jun 11, 2015

• #2

What engine?

If it's a petrol then check throttle pedal setting

 

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scotty57

Member

• Jun 11, 2015

• #3

1.8 petrol

 

Nodge68

Well-Known Member

• Jun 11, 2015

• #4

scotty57 said:

1.8 petrol

Click to expand...

Throttle cable free play not correct or throttle pot not working correctly. Throttle cable free play should be around 10mm.

 

Alibro

Well-Known Member

• Jun 11, 2015

• #5

Had the same problem after tightening the free play at the throttle body. Slackened it again and problem cured.

 

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scotty57

Member

• Jun 12, 2015

• #6

Am I right in thinking the pot is by the pedal and on a 55 plate and cannot be replaced - it comes complete with the pedal assembly ?
Is there any way to test the pot ?

I'll try the throttle adjustment first in the engine bay.

thanks for the advice chaps

 

Alibro

Well-Known Member

• Jun 12, 2015

• #7

scotty57 said:

Am I right in thinking the pot is by the pedal and on a 55 plate and cannot be replaced - it comes complete with the pedal assembly ?
Is there any way to test the pot ?

I'll try the throttle adjustment first in the engine bay.

thanks for the advice chaps

Click to expand...

As far as I know the pot on all K series is on the throttle body

 

Nodge68

Well-Known Member

• Jun 12, 2015

• #8

Alibro said:

As far as I know the pot on all K series is on the throttle body

Click to expand...

Yep
Throttle pot is indeed on the throttle body, on the opposite side to throttle cam.

 

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scotty57

Member

• Jun 24, 2015

• #9

Throttle cable adjustment and new pot fitted (best price was Rimmers by the way) but light is still on. The odd thing is if I start the car with the brake pedal held down the light does not come on straight away when setting off but does after about 500 yards. Any other ideas ?

 

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td4van

Well-Known Member

• Jun 24, 2015

• #10

Think you need to get codes read to determine what the car thinks is wrong

 

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scotty57

Member

• Jun 25, 2015

• #11

I think you are right td4van. Long shot - has anyone got a code reader in the Chesterfield area ?

 

Alibro

Well-Known Member

• Jun 25, 2015

• #12

Loosen the throttle cable a bit more at the TB. It needs to be stupidly loose.

 

B34R

Active Member

• Jun 26, 2015

• #13

So does it come on if you start the car without touching the pedals immediately?

Also, have you set the sensor up correctly on the pedal? (I assume that's the bit you changed?)

 

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scotty57

Member

• Jun 26, 2015

• #14

Good call Alibro. Loosened the cable 4 turns on the nut and hey presto the light has gone out. Thanks all.

 

Alibro

Well-Known Member

• Jun 27, 2015

• #15

scotty57 said:

Good call Alibro. Loosened the cable 4 turns on the nut and hey presto the light has gone out. Thanks all.

Click to expand...

Glad I could help. Not often I'm right about anything so gonna sit here in a glow of smug self satisfaction.

 

Last edited: Jun 27, 2015