ABS fault code 4080

J

JimP 126

New Member

Posts

6

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Flen

• Apr 6, 2023

• #1

Hi, on my D2 face lift 2003 LHD, td5, auto, rear spiral. I have a 4 Amigo fault.

When the WABCO D is read with a Lynx ABS reader I get a fault code,

4080 Pump Relay (Power Amp. with short to U vent) current

This is new to me any hints about problem?

Regards JimP

 

Keith_L

Well-Known Member

Posts

398

Location

Worcestershire, UK

• Apr 6, 2023

• #2

Welcome to the Forum. Do you mean 4-Amigos or 3? If 4, then what is the 4th light - TC + ABS + HDC + ??

 

sierrafery

Well-Known Member

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17,846

Location

Arad/Romania

• Apr 6, 2023

• #3

Hi, the "4 amigos"(ABS/HDC/TC + Brake/Handbrake light) is normal for a short circuit code on that path as you can see in the picture below, it can be the relay itself or if you are unlucky enough a ECU fault or a wiring issue on that circuit, swap relay R10(ABS pump) with R8(heated screen) and see what happens, if te fault goes away put a new relay if still the same we'll speak then

 

J

JimP 126

New Member

Posts

6

Location

Flen

• Apr 6, 2023

• #4

Moved the relays 8 and 10 tried to wipe the fault code but it stayed "current"

ps. thanks for a very quick reply I was shocked

 

sierrafery

Well-Known Member

Posts

17,846

Location

Arad/Romania

• Apr 6, 2023

• #5

Bad luck then cos the ECU becomes suspect, remove the relay, go for a short drive then read the code again, if you get the same code not and open circuit too it can be a short on the wiring between the ECU and fusebox, within the fusebox or ECU fault... troublesghooting is needed based on the circuit diagrams on that circuit

 

J

JimP 126

New Member

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6

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Flen

• Apr 6, 2023

• #6

Thanks for the information will check that out.

 

J

JimP 126

New Member

Posts

6

Location

Flen

• Apr 29, 2023

• #7

Just an update, could not find any information on Lynx fault code 4080 Pump Relay (power Amp with Short to U vent).

So I changed the original SLABS box (SRD 000150) with another older version (SRD 000050) and the fault was gone. Replaced with the original and the fault was back. So now I can drive with the exchange box while I save up to buy an SRD 500070. The black box exchange was a little fiddly but now I am an expert.

All the best JimP