Skoda Fabia I Power Steering Breakdown: Error 01309, Steering Control Module J500 Issues

Hello,

Recently, out of the blue, my power steering broke down. It stopped suddenly when I started the car after 20 minutes of parking.

I replaced the power steering pump with a functional one, but VAG still shows the error: 01309 - Power Steering Control Module (J500) 49-00 - No Communications.

I checked the fuses, the alternator is OK and the battery is OK.

I have no idea what else could be wrong. I checked the harness briefly, the one that goes under the battery on the left side member. There was nothing rotten. The whole bundle is in a plastic tube. I didn't check the harness, only at the bulkhead wall. I don't know how to get there. Any advice?

Jachuw90 wrote:

I checked the harness briefly

And that is a mistake. From the battery area to the bulkhead wall. And tear it out of this cover, there is a place of moisture there.

I understand that I need to remove the air filter? anything else? to see everything on a plate?

The air filter and the upper part of the bracket mounting the gearbox (just use the lever to secure it so that the gearbox doesn't fall down), the engine controller and its mounting, probably to give me access. (I do it so automatically that it's hard to describe it )

I checked a few things and a few facts concern me.

I unscrewed it and saw a bundle, which when I unwound it from the tape, I felt water in my fingers. On the left side member, these cables were lying around and rotting in the water. As far as I know, a typical fault for Fabia I. At first glance, the condition of the harness was not bad. One cable had its insulation broken but was still connected. Nothing was swollen. I dried everything with a hairdryer, insulated what needed to be done and hung it higher so that the bundle would not rot further.

I connected the pump and there is still no communication.

With my father, who is an electrician, I checked the voltages on the plugs that go to the pump. Well, after checking all this, it turns out that there is no electricity to the pump at all.

But there is one disturbing thing, namely:

(I regret not taking a photo when I had everything undressed)

I don't know if it's factory like this, but one of the cables in this harness looked as if something had been done to it before:



As you can see, there is a rubber connector around it.

The next thing is fuse number 4 on the battery cover. It is not from the power steering, but from the glow plugs. You can't see it in the photo, but it is interrupted:



There is a red-black cable from this fuse, which is according to: to me the same as the one with the large pump plug:



I know there is another cable on the battery cover that is red and black, but it is thinner.

Is it difficult to check the passage behind the blown fuse to the pump?

Sorry, I don't understand your question at the moment. What passage?

Fuse no. 3, i.e. the one responsible for the pump, is OK, it has 12 V

Continuity of the cable from the fuse (which was burned) to the power steering pump

There is continuity.

The third fuse is from the pump, you write that there is continuity and there is no power on the plug, so maybe you are not fully inserting the test leads into the plug or there is no ground if you take it from this plug.
As for the harness on the side member, sometimes the cables look nice there, but you just need to pull and they tear.
You can supply power to this socket straight from the battery and it will turn out whether you are missing something else or just the power supply.
In the second plug, you have a black and yellow wire where there should be a plus wire after the ignition switch, and two orange wires with a black and brown stripe for communication with the central electronics module - these wires already come from the cabin in a bundle on the side member, the communication wires are intertwined.

When it comes to measurements, I was definitely hitting the plug. I took the mass from the metal engine casing.

In my case, the cables did not break, I dried them with a hairdryer and then opened them manually, and nothing disturbing happened.

I made the measurements as in the document I found here on the forum - "Electrical check of the TRW power steering"

When you say "in the second plug", do you mean the smaller one?

Diagrams are diagrams, descriptions are descriptions, and the photo shows that the positions of the wires on the fuse box are reversed. Based on the colors and cross-sections of the cables, it turns out that my friend's power steering fuse is in position four. Has anyone replaced it? Once replaced, you need to check whether the fuse values are appropriate for the given circuits. It's best to restore the correct order.

On the large plug next to the pump, you should have constant 12V coming from the fuse on the battery. Take a 45W bulb and check the fuse. This cable is 40 cm long and goes from the battery box to the plug.

Yes, the smaller one.
There are three plugs on the measuring device - power supply, communication with the plus after the ignition switch and the third one - the steering sensor.
I mean the second one unfastened in the photo.
There are no miracles, you say that the cable has a passage, the fuse is intact, but there is no voltage, so you are doing something wrong, because if the cable is intact, there should also be one at the heel.
Check with a 55W bulb whether there is power behind the fuse, if there is, check with the bulb whether it is red and to the battery ground.
Either there is no power through the fuse or the cable is damaged (although I doubt it).
Do not check continuity with a meter, but with a light bulb, because sometimes the meter will show and when a larger current flows, there is a large voltage drop on the wire.

hobbista wrote:

Diagrams are diagrams, descriptions are descriptions, and the photo shows that the positions of the wires on the fuse box are reversed. Based on the colors and cross-sections of the cables, it turns out that my friend's power steering fuse is in position four. Has anyone replaced it? Once replaced, you need to check whether the fuse values are appropriate for the given circuits. It's best to restore the correct order.

It looks like it has been replaced, since according to colleague T5 this cable goes from the battery box to the large plug. But the order doesn't seem to matter here, since I've been driving my car like this for 2 years and nothing has happened.

grala1 wrote:

Check with a 55W bulb whether there is power behind the fuse, if so, check with the bulb whether it is there if red and to the mass of the battery.

Ok, I'll check with the bulb. Could you explain what the red thing is about?

You replaced the broken fuse no. 4 ? For the pump it will be 50 A

The cables were replaced. Replaced fuse. The pump works like never before. Topic to be closed. Thank you all for your help.

Hello,

I will raise the topic because the problem is similar only in the Seat (same pump) 1.416v BKY 2006, the same error.

in this topic, grala1 wrote that there should be +12volt on the yellow-black wire after the ignition switch in this small cube. Does it go through a fuse? Directly after the ignition?

Because, of course, I already checked everything, including the large 50A cable, and the voltages and grounds are there (2.5vlots from Can, too). Besides, +12 on this smaller plug-in.

Ew. If I can't restore the factory settings, can I add the +12 myself?

I can't connect to the pump at all on the VAG, and in the central electrics tab I have the error 01309 - Power Steering Control Module (J500) 49-00 - No Communications.

Thanks in advance

If everything is OK on the cables, the pump is probably faulty.

In my case, the fuse was blown, I diagnosed it quite late, because the fuse cables, which are located on the battery cover, were reversed.



By default, the 3rd fuse from the left is responsible for the power steering pump, mine was switched to the 4th fuse, where the fuse was blown.

I probably won't help, but it's worth checking, because as you can see, miracles can happen.

No, it's ok, it hasn't been replaced, checked with a 50-watt bulb.

The wires are not OK, because there is no +12 after the ignition switch.

Sorry for the dig, but I'm struggling with the same error. I checked the voltages on the pump plugs. The large one is gnd and 12. On the signal 12 and twice 2.5V. But nothing appeared on the plug with steering angle signals... I can't find a description of this plug-in anywhere. Maybe someone has it? What to check next?

If you have constant plus, ignition and ground, the voltage on CAN is a dead pump, the sensor cube has nothing to diagnose

milejow wrote:

If you have constant plus, ignition and ground, the voltage on CAN is a dead pump, the sensor cube has nothing to diagnose

Exactly. There the seal breaks and the liquid gets into the electronics. Replace with a new one and the problem is solved.

Thanks gentlemen. In my case, the problem occurred after standing still for 3 hours with the engine running, waiting for a tow truck to take my wife's car. I read somewhere that these are not favorable working conditions for her...