SRS warning light on all the time

[John C]

How do I check what is wrong with my SRS?
Please note I also had a lot of water in my boot, could this cause any contact problems?
After a short distance the ABS and TCS lights also come on, could they be connected?
This is my daily car and my MOT is due soon, so any help is appreciated.

[NSXGB]

First step is to check for error codes.
Likely to be the fuse blown due to the capacitors in the SRS module leaking - common faults.
Year and spec of your NSX may help further.

[John C]

Thank you for your prompt reply, it is a 1997 Auto.
How do I check the error codes for SRS?

[Kaz-kzukNA1]

97 so it has passenger SRS as well.

SRS is not connected to the SCS blue 2pin connector and it also doesn't store any codes.
Thus, no code reading.

If you got the SRS warning light suddenly and didn't work inside the cabin recently, then as NSXGB mentioned, very likely to have blown the fuse.

Check #1 10A SRS fuse at the fuse panel located at the passenger footwell side wall inside the cabin.
You may find small yellow cover on top of the red 10A fuse.

If blown, most likely caused by capacitor leakage inside the SRS controller.
It's safety device so not recommending repairing.

Only done so with strict agreement with the owners in the past but never done the controller with the passenger SRS included.



For the ABS and TCS lights.....

Please confirm that your ABS is still the original classic one and not upgraded to the latest spec.

Please read the error code first.
http://www.nsxcb.co.uk/showthread.ph...the-error-code

After reading the code(s), reset the system (don't do this just before leaving for MOT although the SRS light will fail your MOT) and carry out another test driving session.

This is necessary as some of the codes could be stored long time ago and already fixed but the codes could be not reset yet.


The reset procedure is different if you have upgraded the ABS.

If your boot got lots of moisture and if the code includes the one for the Rear Right (RR) w/speed ALB sensor, addition to checking the resistance of RR sensor, you need to check the state of the Female terminal at the big grey 20+pin connector located at the left forward section of the boot behind the carpet.

I'll leave the detail for now as reading the code is the first.


Kaz

[John C]

Thank you Kaz, sorry for the late reply but I had to go out. Strange that all the lights came on at the same time, that's why I thought they might be connected. The boot was actually flooded covering the tools, never happened before or since. Spent a long time drying it out. Found a bad connection on one of the brake bulbs. Car was slightly damaged when someone drove into me from the side. Now repaired by someone with a good reputation. Incident did not trigger the SRS light, this came on later.

[Kaz-kzukNA1]

If there is an issue with the w/speed sensor, then it will trigger both the ABS and the TCS lights.
The raw sensor signal first enters the ABS controller, then the signal is filtered and level converted, then it will be passed onto the TCS controller.
Therefore, with the w/speed sensor failure, you would see first the ABS light and within 1sec or two, the TCS light will be triggered.

If you are saying that all three ABS/TCS/SRS lights were triggered simultaneously at the exactly the same timing or within a few seconds each other, then I agree, something suspicious and not true failure.

Not exactly the same but on UK spec NSX, if specific conditions were met, you could trigger the parking brake indicator (the big red circle at the gauge) by disconnecting the R-side taillight assy even when the parking brake was disengaged.
This is not the case with the JDM NSX.

Please read the error code first and then reset it.

Please clarify the spec of your ABS (classic or upgraded).

Also, bit more detail on exact timing on when the three lights were triggered.

By the way, did you jump start the car recently or what is the voltage reading in P2 ON position and while cranking?


I'm in the middle of suspension installation so may not be able to check the Forum for awhile.

Kaz