ECU Error Codes.

[jaffaz32]

Hi,

I'm having a problem after having a alarm fitted.

The car keeps popping amp fuses in the aftermarket amp in the boot. Took out one of the mid speakers.

Also the ABS and TCS lights are on the dash.

How do i read the error codes from the ECU? Are there other error codes to check also?

I have tried doing a search on error codes but didnt have much luck.

For my 300zx i had datascan which install onto a laptop and with a special cable plugs into the diag port. is there a similar thing for the NSX?

[AR]

what year is your car?

There is a blue connector that you can find by the passanger footwell, jump it and you can count the "blinkks" when you switch on the ingnition.

Sounds like the alarm people might have mess something up, where is the power from the amp drawn?

What happens if you leave the amp fuse off and reset the ECU?

[Hagasan]

what year is your car?

There is a blue connector that you can find by the passanger footwell, jump it and you can count the "blinkks" when you switch on the ingnition.

Sounds like the alarm people might have mess something up, where is the power from the amp drawn?

What happens if you leave the amp fuse off and reset the ECU?

I saw on Prime that the OP had listed the snags there and said that there was a puff of smoke from the speaker!! If it's still the Bose units then someone really doesn't know what they've installed putting an amp in....

From what I read on Prime anyway it would appear that things have been bodged in some way by someone/persons who don't know the NSX wiring/control units set-up etc.

Additionally Jaffaz is new to the NSX.....

It may be safer to approach the installers now rather than "mess" with their work giving them a potential way out by blaming the customer....If they can't fix the problem or deny it then it's the small claims I guess.....Been there done that (not with the NSX) and won.

By all means advise but I think he needs to act sooner with the installers and has been advised the same on Prime...

Gary

[AR]

I agree Gary hence why i mentioned tha they might have messed it up.

I just ask about the amp as I was going to suggest to leave it off in case the car goes up in flames.

But your advise is spot on, go straight to the bodgers. :)

[jaffaz32]

This is the score, The alarm is a cat 1 so was fitted by a approved fitter.

I had the problem so took it back, he said he had fixed it and also said the ABS and TCS was nothing to do with the alarm but come on clearly is as it happens after it was fitted.

At the end of the day he is a alarm fitter not a electrical specialist let alone a Honda one.

Do i really want a guy not knowing what he is doing messing with my electrics? not really.

I am pretty handy when it comes to cars mainly because i've had a few and that way inclined but i know my limits and wont do anything which riches my limits. All i wanted to do is trace back the wiring and get the error codes.

Which I have now done.

Never done error codes before so the two lights flashing on the dash was the TCS and the ABS both was reading 4-2 the ABS repeated couple times and the TCS kept going. Nothing else was falshing on the dash so i assume i have no other error codes.

The amp and speakers are all aftermarket, Genesis with a Bazzooka bass tube. The amp is in the boot and fed from the battery up front by a power lead. Looked a good size enough for the amp anyway. However when tracing it back i found that the alarm was installed off this red lead for the amp which is clearly why the amp keeps popping fuses.

I would assume the amp in the boot power the speakers up front which are Components e.g. mid and tweeter, it's one of the mids that has gone. I need to trace back and find the crossover box for the speakers and take a look at that.

I also found another random cable in the footwell, a descent size orange one, didnt get time to see where it was going.

Yeap so my error code is 4-2

[AR]

This is the score, The alarm is a cat 1 so was fitted by a approved fitter.

I had the problem so took it back, he said he had fixed it and also said the ABS and TCS was nothing to do with the alarm but come on clearly is as it happens after it was fitted.

At the end of the day he is a alarm fitter not a electrical specialist let alone a Honda one.

Do i really want a guy not knowing what he is doing messing with my electrics? not really.

I am pretty handy when it comes to cars mainly because i've had a few and that way inclined but i know my limits and wont do anything which riches my limits. All i wanted to do is trace back the wiring and get the error codes.

Which I have now done.

Never done error codes before so the two lights flashing on the dash was the TCS and the ABS both was reading 4-2 the ABS repeated couple times and the TCS kept going. Nothing else was falshing on the dash so i assume i have no other error codes.

The amp and speakers are all aftermarket, Genesis with a Bazzooka bass tube. The amp is in the boot and fed from the battery up front by a power lead. Looked a good size enough for the amp anyway. However when tracing it back i found that the alarm was installed off this red lead for the amp which is clearly why the amp keeps popping fuses.

I would assume the amp in the boot power the speakers up front which are Components e.g. mid and tweeter, it's one of the mids that has gone. I need to trace back and find the crossover box for the speakers and take a look at that.

I also found another random cable in the footwell, a descent size orange one, didnt get time to see where it was going.

Yeap so my error code is 4-2

Dude just take it back, it is obvious they mess something up.

[duncan]

TCS and ALB lights, check your brake lights for a blown bulb.
If the amp in the boot is fed from a discrete aftermarket cable and the alarm is jumped off that, and the fuse to the amp/alarm keeps popping; I would suggest that the fault is not Mr Honda but could be either the amp or the alarm. Try putting the alarm and the amp on separate lines with their own fuse.

[jaffaz32]

You will all be happy to know it's back with the alarm installer for the second time to problem solve the issue.

Lets hope this time they crack it.

Out of curiosity the error code i got when i done the test was 4-2 what is this for?

[jaffaz32]

As posted on Prime.

Update:

Got the car back, they removed the alarm refitted it and even tried another alarm, another feed from the battery etc. etc.

5 min down the road both the lights come back on.

(2nd time it's gone back for the problem)

Where do i go from here?

As mentioned previously when i done a error code check i get 4-2 which Briank linked me to (thanks) would indicate it is the Front Left Wheel speed sensor.

Could this be a complete coicidence do you think?

Do i try cleaning the sensor or do i replace it? or maybe is there something else?

As for authorised Honda NSX Delearship the closest one is a long way away from me. It is a possibility but would really like to try get it sorted without sending it millions of miles away.

Actually just a thought.

After searching ebay for "abs nsx" a control unit came up. Where is this located?

I want to trace the cable from the unit back to the sensor, maybe the connector has come loose or something.

Where is the control box located?

Are there any guides/diagrams showing locations of certain parts on the NSX?

[Sudesh]

The ABS/ALB control unit is located behind the glove box, you need to remove the lower cowling and the glove box to get to that. But there is no point in tracing the cable from there as it will run into the rest of the wiring loom of the car, so unless your prepared to do a huge amount of work and take the car apart, its not worth it. Unless your installer tapped into the ABS/ALB cable and damaged it? or shorted something? But I'm sure he knows what he's doing.

Personally I would check the sensor, its easy enough to work at, its all connected up near the suspension strut and you will be able to see if its plugged in tightly or any loose wires etc. Not sure if taking it out and cleaning it will help, might be best to just replace it.

Not cheap new though.


As posted on Prime.

Update:

Got the car back, they removed the alarm refitted it and even tried another alarm, another feed from the battery etc. etc.

5 min down the road both the lights come back on.

(2nd time it's gone back for the problem)

Where do i go from here?

As mentioned previously when i done a error code check i get 4-2 which Briank linked me to (thanks) would indicate it is the Front Left Wheel speed sensor.

Could this be a complete coicidence do you think?

Do i try cleaning the sensor or do i replace it? or maybe is there something else?

As for authorised Honda NSX Delearship the closest one is a long way away from me. It is a possibility but would really like to try get it sorted without sending it millions of miles away.

Actually just a thought.

After searching ebay for "abs nsx" a control unit came up. Where is this located?

I want to trace the cable from the unit back to the sensor, maybe the connector has come loose or something.

Where is the control box located?

Are there any guides/diagrams showing locations of certain parts on the NSX?

[Sudesh]

Pic attached

http://i77.photobucket.com/albums/j77/icongroup/NSXPARTS/untitled-1.jpg

[Kaz-kzukNA1]

Hi, jaffaz32.

As others suggested, I thought it would be best for you to take back your car (I know, it's already done...) to the alarm/security installer to sort this out for you.
If the customer has any question marks, then I think it is the responsibility of the organisation that carried out the service to answer/clarify it.

However, looking at other posts on Prime and here, it now looks like you are start working on the car to investigate it by yourself.

Personally, I think it is still best to talk/notify the installer before doing anything but I’ll leave the final decision to you.

Regarding the wheel speed sensor, if you have never removed it in the past from NSX or never seen the actual sensor parts off the car, then it is best not to try removing it from the knuckle. You will probably damage the sensor housing.

In fact, to check the sensor, you don't need to remove it.

If you take your NSX to the Honda garage that has the ALB/ABS checker, they can connect it to the 6pin Pink ALB/ABS Diag connector at the passenger carpet area, rotate the Front Left wheel by hand and monitor the LED light to confirm the signal from the sensor.

Wheel speed sensor is just a magnetic field pick up so two wires from the sensor and you can check it at the 2pin Orange connector hidden behind the fuse box under the bonnet or at the 20pin Orange connector located at the ABS controller as in Sudesh’s post.

It would be easier for you to check it at the 20pin connector as you may be inspecting the damage to the cables as well. Remove the 20pin connector and put multi meter at pin #3 & 8. If you are not sure about the pin out, then you can find it out from the 2pin Orange connector instead.

You should see about 1Kohm or so.

If open/short circuit, then you have sensor head failure or wiring issue somewhere between the sensor and the controller.

There is also a possibility of trigger pulser teeth failure behind the front hub but first thing first…

Again, I would strongly recommend you to contact your installer again and again before doing anything (even taking it to Honda) as you should be covered by their guarantee.


Regards,
Kaz

[Hagasan]

Can I suggest before buying ABS sensors (as per your other post) you consult with the installer again!! Ask him to identify and show you the points at which he tapped in to your car wiring loom. Make a note of all the connections and then identify what wires on the loom have been used. This way it will be easier to work out possible ccts affected and the issues likely to occur. At this point there should be no need for you to start throwing more money at your car until the symptoms are properly investigated/diagnosed..Otherwise it's just guesswork. An error code could be flagged up by a short, high resistance or any wiring anomoly caused by the alarm loading....