Don Quixote project well under way, but....

[Pierre]

Hi, RRS users/lovers/haters. Nice winter in Victoria ATM.

Now, I have put a replacement engine in after body off. Reinstalled everything, runs like a clock.

The ECU installation behind the battery had been partly dismantled before I got the car for its resurrection cycle. So I don't have any obvious clues about any smaller cable connections/colour-tracer/important stuff to make canbus work correctly, I suspect.

The problem I have encountered is that the EPB does not work and nor does the suspension. The faults are U0128 BUS signal/message failure (Lost comms with parking brake module) and C1131 (component failure - performance or incorrect operation).

Does anyone have any clues about my next diagnostic step? The wiring diagrams 204-05 Air suspension, pages 1 and 2 will be adequate, I think. 418-00 Comms Network will also help me troubleshoot the system. Location of air suspension control module? Any links in the passenger side wiring harness space? Would anyone have a picture of the links/connections (other than the ecu plugs - they are ok, I believe).

A big ask, I know, but any clues would be a bonus.

Cheers all.

Pete

[loanrangie]

Check the big plug pack that sits on the chassis rail behind the left rear wheel (assuming same location as D3) as this is a main canbus harness and is known to cause issues.

[Pierre]

Just about to hit the hoist. We'll soon see. Cheers for the hint.

Pete

[Pierre]

Well, not that anything untoward was seen there at the rear lh wheel well.

Would there be about the place a Connector quick reference guide for 2008 build RRS? Or even a place where one could be found or even shared?

Pete

[Graeme]

The suspension control module is high up on the driver's A-pillar.

The transfer case module is a gateway for the lesser important ecus such as suspension and EPB. IIRC the D3/early L320's TCCM is located behind the battery so its connections may have been disturbed. It is also unsealed, open at the bottom and the contacts can become corroded.

[Pierre]

Graeme, thanks for that heads-up. I have removed and uncovered that TCM, deployed the circuit board cleaner and revarnished it.

I will reinstall and test tomorrow. Hopefully that will at least let me in. 5 of the faults are U0128 - Lost comms with xxxx. Does this indicate what I think you are suggesting, that gateway entry will reinstate CAN comms?

Cheers

Pete

[Graeme]

Yes. It used to be a common fault when D3s went for a bit of a swim, sometimes requiring a replacement module. Ensure that the terminals in the connector shells are in good condition too if the pcb contacts weren't so good.

[Pierre]

raeme, after your advice and action I have recovered a small amount of suspension information, but the canbus fault is still logged. I am thinking that the EPB module may have gone to God.

Thanks for the help.

Pete

[Graeme]

EPB modules aren't known to give canbus faults, only jamming and destroying gears.

What faults now and what do you mean regarding the suspension?

Is your vehicle a D3 or an RRS?

[Pierre]

EPB modules aren't known to give canbus faults, only jamming and destroying gears.

What faults now and what do you mean regarding the suspension?

Is your vehicle a D3 or an RRS?

Graeme, I'll print the faults and send them to you as they are displayed. There are a couple that are obviously associated with the body off period, but the others are mainly associated with U0128. I have a set of gears set to go for the EPB module, and a replacement RHS cable that had been somehow chewed, I think by the retention loop on the lower arm. PO reckoned that everything worked when he parked it up 2 years ago.

The vehicle we are working on is 2008 RRS, SALLSAA139Axxxxxx. 2.7l diesel auto.