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ABS Failure- Brake Distribution Failure


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I have a 2003 C2 Cab. No Mods. 40,000 miles.

I started getting warning lights just driving along at any speed. The lights say "Break Distribution Failure" and "ABS Failure" they blink for a second then go off. There is no noticeable change in the breaking. I had new break pads, discs and sensors in the garage ready to put on- so I did that all they way around just in the slim chance it might be a sensor. That didn't help. I have the durametric code reader. Any ideas of what this might be or should I go to a dealer

I have searched around for hours- sorry if this topic is fully covered somewhere I missed! Any help is appreciated!

Thanks!

Darin

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I will check the durametric as soon as I get a chance. The break lights work- I also noticed two other warning lights at lunch, the check engine and a message that said system failure- or something like that (it only flashed for a second). These don't stay on the just beep and flash for a moment. The MAF could be the problem as I have occasional super jerky early morning starts in first gear...

Thanks Loren!

Edited by drhollings
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I haven't had a chance to attach the Durametric yet but I have new info

While working on an unrelated roof rattle and roof hook refusing to latch issue. (sigh). The failure lights began to flash. While this was happening the car was cycling the rear wing! Any ideas?

I will attach the Durametric when I get the power suppy for my pc found!

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Here are the codes out of the Durametric. It is only the second time I used it- but I think I got them all. I would really appreciate any help in making heads or tails of this!

9X6 ABS 5.7 Selected

About to get fault codes

moduleType = MotronicDME78

DTC Count = 1

Fault Number:P1601

Description:Porsche fault code 660 - CAN timeout - instrument cluster

Displaying infomation about Motronic 7.8

Porsche part number 99661866015

Supplier part number 0261206579

Software version number: 004161004620

Data Version 0041610046203613

Number of ignitions range 1 1274 / 1178h

Number of ignitions range 2 70 / 661h

Operating hours counter 1358

VIN: WP0CA29993S65XXXX

Type ID DME control unit __996US03

Order type 996310

Country code C02

Engine type 9603

Engine number 66302206

Transmission type G9601

Transmission number 1266290432

Radio code 0

Body color/convertible top color 92U tb

Interior equipment AA

Motronic 7.8

Current Fault Codes

--------------------------------------------------------------------------------

P1601

Porsche fault code 660 - CAN timeout - instrument cluster

ABS/PSM 5.7

--------------------------------------------------------------------------------

Block 80 7F 1A 12

Block 9F 5A 9F 07

Block 91 5A 91 09 96 35 57 55 05 09 96 61 81 15 00

Instrument Cluster

Current Fault Codes

--------------------------------------------------------------------------------

9110

DME control unit

Status: not present

--------------------------------------------------------------------------------

9111

PSM/ABS control unit

Status: not present

Alarm

Current Fault Codes

--------------------------------------------------------------------------------

33

Interior sensor faulty

Status: not present

Frequency counter: 1

--------------------------------------------------------------------------------

60

Central locking limit position

Lock not reached

Status: not present

Frequency counter: 2

--------------------------------------------------------------------------------

54

Radio receiver defective

Status: not present

Frequency counter: 8

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Oh Renntech joy!

The cluster had not been out ever but I went ahead and reset all the connectors and cleared all the faults and all is as it should be. Took a spin around the neighborhood with a great feeling having conquered a problem with the help of friends that would have cost me a grand at the dealer.

Thanks Loren and Wvicary!

post-21040-070788000 1278040609_thumb.jp

Edited by drhollings
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Epic Fail- the warning lights are back. (uhg) (ABS failure- break distribution failure- check engine light) What is the next thing to try?

Thanks!

About to get fault codes

moduleType = MotronicDME78

DTC Count = 1

Fault Number:P1601

Description:Porsche fault code 660 - CAN timeout - instrument cluster

Application closing at user request

About to get fault codes

moduleType = MotronicDME78

DTC Count = 1

Fault Number:P1601

Description:Porsche fault code 660 - CAN timeout - instrument cluster

Displaying infomation about Motronic 7.8

Porsche part number 99661866015

Supplier part number 0261206579

Software version number: 004161004620

Data Version 0041610046203613

Number of ignitions range 1 1274 / 1178h

Number of ignitions range 2 70 / 661h

Operating hours counter 1359

VIN: WP0CA29993S65xxxx

Type ID DME control unit __996US03

Order type 996310

Country code C02

Engine type 9603

Engine number 66302206

Transmission type G9601

Transmission number 1266290432

Radio code 0

Body color/convertible top color 92U tb

Interior equipment AA

Application closing at user request

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  • Admin

Sorry to hear that.

P1601 CAN timeout instrument cluster - signal implausible

P1601 CAN timeout instrument cluster - open circuit

Possible fault causes:

- Wiring harness faulty

- Plug on instrument cluster not connected

- Instrument cluster faulty

Note:

- If all CAN bus faults are stored, there must be a short circuit in the CAN bus wiring.

- If one CAN bus fault is stored, the cruise control system is out of order.

- CAN bus faults may be caused by a control module reset. The fault is then indicated as "Not present".

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I have a feeling it may be the ABS Module. Come to think of it just before all this started I was getting some weird shuttering on a few very low speed stops.

A few more questions...

Is replacing the ABS module straight forward?

If so where is the best place to buy one? (online USA)

Is the procedure described anywhere on this site? (I couldn't find it)

Again- thank you thank you thank you!

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The first time I replaced one( an Audi) the unit cost $5000.00 CND which included the complete ABS module,pump motor and valve block. Since then they have a rebuilt unit that sells for $600.00 CDN which is just the control module. As Loren stated, exhaust all other diagnostic avenues before replacing the unit. This is a complicated procedure and one of times I recommend getting an opinion from the dealer as they have the correct test equipment/experience and possibly find another source of the fault.

As for replacement, just replace the control module which is only held on with a few torx screws and don't open the brake system hydraulics. Perhaps you can source a unit through an autowrecker.

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I have a loaner instrument cluster in for the weekend. So far so good no warning lights. If this holds out until Monday they will send my instrument cluster in for repairs. ($650.00) The loaner instrument cluster must be from a hardtop because the top wont go down. On the bright side it only has 8000 miles on it.

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The instrument cluster was "repaired" at the cost of 650.00 plus tax. That did the trick. I couldn't get any additional information about what got "fixed" but it's working so I guess that is fixed enough for me. What a colossal pain in the butt. Thanks all for the help!

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  • 2 months later...

Is P1602 pretty much the same as P1601?

My SpecBoxster race car is having P1602 right now.

Of course, it is a race car, most of the stuff are disconnected.

But if it is affecting my ABS, I will need to address the issue.

Fault Number:P1602

Description:Porsche fault code 660 - CAN timeout - instrument cluster

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