Brake Fault - Help

[SD1too]

Originally Posted by bearhouse

With regards to the handbrake switch. I'm confused as to how this can cause a 'Brake Fault' to come up in the message display.

I agree Terry and I don't believe it would. Besides, you've tested the handbrake switch and it's working properly.

The red brake warning lamp (LED) is illuminated to indicate:

• ABS and EBD failure
• Handbrake applied
• Low brake fluid

The "Brake fault" display in the message centre is triggered by the instrument pack and we don't know the conditions for this.

Originally Posted by bearhouse

As my ABS pump connector plug is corroded, I'm assuming my fault lies there?

I agree that this is likely given the simultaneous ABS, brake and ETC warning lights. RAVE confirms this combination as indicating an ABS and EBD failure. Can you post a photo (preferably not a thumbnail) to show the extent of the corrosion Terry?

Simon

[bearhouse]

Hi Simon,

I’ve not figured how to post photos yet. Please let me know what to do.

Regards,

Terry.

[SD1too]

Originally Posted by bearhouse

I’ve not figured how to post photos yet. Please let me know what to do.

I know of three ways:

• Choosing a photo directly from those stored on your computer
• Uploading photos from your computer to the forum's library.
• Copying the image address and pasting it into your reply.

For the first option, when typing a reply to a post, amongst the icons at the top of the message pane can you see a paperclip symbol? If so, selecting that enables you to choose a photo from your computer's library. This facility doesn't appear to be available on all equipment though. It might be a Mac thing.

To upload a photo to the forum, click on Image Gallery in the brown menu strip and see how you get on. I think there's a "How to" offering guidance. Once you've successfully stored an image there, you have to highlight and copy the BB Code IMG address and paste it into your reply using the square mountains icon above. It's all a bit clunky!

On my MacBook I can copy most image addresses by using control>click then pasting them into a message but if you're using Windows it's probably different.

I'm not a computer whizz at all so those basic instructions are about as far as I go! I hope they help.

Simon

[suzublu]

On the laptop, I use imgur. On the phone I use Tapatalk, then just upload from your phones gallery

Sent from my SM-A145R using Tapatalk

[Martin Butler]

Because of where the handbrake switch is, it can sometimes develop internal faults, due to build up of debris it might be worth double checking, and cleaning in case the switch isn't fully switching but , as TOAF is reading it as a relay error if you can locate the relay, try cleaning the contacts, and or substituting another relay to see if it clears the problem.

[SD1too]

Originally Posted by Martin Butler

Because of where the handbrake switch is, it can sometimes develop internal faults, due to build up of debris it might be worth double checking, and cleaning in case the switch isn't fully switching but , as TOAF is reading it as a relay error if you can locate the relay, try cleaning the contacts, and or substituting another relay to see if it clears the problem.

Hi Martin,

Thanks for your thoughts on Terry's problem but if only the handbrake switch was faulty, the ABS and ETC warnings wouldn't appear but they do.

Regarding TOAF's diagnosis, I suspect that the term "relay" is inaccurate. The ABS modulator contains solenoid valves which are entirely internal so substitution isn't possible and there are unlikely to be any contacts to clean!
"Relay fault" is likely to mean that a solenoid valve isn't operating which Terry suspects is due to corroded terminals on the modulator's electrical connector.

Simon

[Mike Noc]

Originally Posted by bearhouse

The ABS light is not going out. Yes, the plug on to the traction control unit is in place. I still think it's the connections to the ABS pump. TOAF says there's a relay fault on the pump.

Terry you have a PM.

[bearhouse]

http://

You can see the 'crud' in the ABS plug.



You can see white mould in some solenoids of the old ABS Pump.



With the new ABS Pump, this is the current reported fault.

[Arctic]

Hi Terry.
What did the pins look like, any corrosion on those.
1

2

You may well need a new plug loom looking at that much corrosion.

[SD1too]

Hi Terry,

Thanks very much for the photos.

The important thing is whether the terminals inside the loom connector are affected by the staining visible on its surface. Unfortunately I can't tell by zooming in to the photo because the definition isn't good enough. As Arctic points out, you'll get a clue from looking at the condition of the pins on the original modulator unit.

Once you've reached a judgement on that you can consider whether electrical contact cleaner spray is worth a try. Failing that, seek a length of galvanised wire about the same diameter as the modulator pins and use it as an abrasive tool on any corroded female terminals. (I had something similar recently on my rear lamp cluster connector and I successfully used a thin needle file.)

You really don't want to attempt to solder and insulate 27 wires if you can possibly avoid it.

The TOAF screen isn't very helpful as it doesn't identify the inoperative component.

I don't think that the white deposit on two of the solenoids in your original modulator is anything to worry about. It's interesting to see inside one though so thanks for posting it.

Simon