"Service ASR" & 'Service ABS" lights - ZR-1 Net Registry Forums

92whiteZ · 12-02-2013

My Z has started a strange habit of turning on the "Service ASR" & "Service ABS" lights on every so often. Its only while I am out driving it and it isn't every time. Upon initial start up the lights go through their normal check and then stay off until something goes funky and the come on.

Turn the car off and after restarting the lights are off. They don't always come on and havent been able to reproduce them coming on under controlled circumstances.

Is this an indicator something is about to go out? I have a Genisys scan tool but honestly doesn't read the OBD 1 cars that well. need to save up for a Tech1. Have not pulled any codes as I haven't had the scan tool connected when the lights have come on.

Anyone experience something similar?

thanks

GOLDCYLON · 12-02-2013

Quote:

Originally Posted by 92whiteZ

My Z has started a strange habit of turning on the "Service ASR" & "Service ABS" lights on every so often. Its only while I am out driving it and it isn't every time. Upon initial start up the lights go through their normal check and then stay off until something goes funky and the come on.

Turn the car off and after restarting the lights are off. They don't always come on and havent been able to reproduce them coming on under controlled circumstances.

Is this an indicator something is about to go out? I have a Genisys scan tool but honestly doesn't read the OBD 1 cars that well. need to save up for a Tech1. Have not pulled any codes as I haven't had the scan tool connected when the lights have come on.

Anyone experience something similar?

thanks

Easy things first... Check your brake master fluid level

92whiteZ · 12-02-2013

yeah I looked at that too. I recently flushed all the lines when I put on the GS calipers, new pads & rotors. So the master cylinder is full.

And this just popped up, I had a few hundred miles on the new brake set up before the lights started coming on. unless I somehow have an air bubble that was hiding in the system that found its way to the abs controller....

that's why i find it slightly odd.

GOLDCYLON · 12-03-2013

Quote:

Originally Posted by 92whiteZ

yeah I looked at that too. I recently flushed all the lines when I put on the GS calipers, new pads & rotors. So the master cylinder is full.

And this just popped up, I had a few hundred miles on the new brake set up before the lights started coming on. unless I somehow have an air bubble that was hiding in the system that found its way to the abs controller....

that's why i find it slightly odd.

Thats entirely possible (Air in the system) I suggest a good bled of the system again to just rule that out. Ive done your exact brake setup on my car and nary a problem.

Schrade · 12-03-2013

Have you moved the Spark Plug Wires recently?

If they're mis-routed, they can emit EMI - same as a nuke, and solid state sensors and nukes don't get along. (me either - I'm fresh out of SPF nuclear strength)

92whiteZ · 12-03-2013

these are all good tips. thx

I have not moved the spark plug wires recently. I did change the plugs but didn't put new wires on. and it appears all the OEM wire looms, etc are still in place.

I will tinker with it this weekend and see if I can consistently recreate the problem.

Jagdpanzer · 12-03-2013

Are all your tires the same diameter?
Had the same alarm lights trip on my 94 when taller rear tires are installed.

92whiteZ · 12-09-2013

So I did some experimenting this weekend. Under normal driving conditions the abs/asr lights stay off. Even under moderate braking. But any big braking where the body shifts heavily to the front, the abs/asr lights illuminate and even the brake light in the gauge cluster will illuminate briefly. Like the fluid is sloshing around in the master cylinder, uncovering the sensor. The MC is full with fresh fluid.

Am I correct to presume there is air trapped in the system? I just bought a tech 1a. Is there a means of cycling the abs controller to help move fluid through it?

Once the tech 1a arrives I will pull the codes. What is interesting is the lights dissappear every time the car is turned off. And stay off until I make a hard braking move where the weight shifts forward.

I am running shelby wheels which what I presume are correct
+1 sizing.

Thoughts?

Schrade · 12-09-2013

I am pretty sure that if there's air in the MC, it CANNOT be cycled down the lines, to purge. I THINK the lines have to be dis-connected to properly purge air from the MC, and AFTERward, the air that might be in the lines. Could be wrong tho here'... I think 2 tubes should be connected to the MC OUTputs, back into the MC reservoir.

Did you get di-electric grease in the SP wore boots? This high energy ignition system will readily discharge EMI, if ANY resistance is encountered, I do believe here.

92whiteZ · 12-10-2013

When I flushed and bleed the brakes I used a snap-on brake machine that has vacuum lines attached to the bleeders and low pressure at the MC with fluid. I don't think any air got trapped in the MC but who knows.

I did change the plugs recently and have yet to put dielectric grease in the boots. will do that this weekend. that's a good thought, thanks!

I am prob just stuck bleeding the system again. just wanted to check and see if this was similar to anything someone else may have dealt with.

thanks everyone!

12-02-2013	#1
92whiteZ Join Date: Sep 2013 Location: Los Angeles, CA Posts: 122	"Service ASR" & 'Service ABS" lights My Z has started a strange habit of turning on the "Service ASR" & "Service ABS" lights on every so often. Its only while I am out driving it and it isn't every time. Upon initial start up the lights go through their normal check and then stay off until something goes funky and the come on. Turn the car off and after restarting the lights are off. They don't always come on and havent been able to reproduce them coming on under controlled circumstances. Is this an indicator something is about to go out? I have a Genisys scan tool but honestly doesn't read the OBD 1 cars that well. need to save up for a Tech1. Have not pulled any codes as I haven't had the scan tool connected when the lights have come on. Anyone experience something similar? thanks

12-02-2013	#3
92whiteZ Join Date: Sep 2013 Location: Los Angeles, CA Posts: 122	Re: "Service ASR" & 'Service ABS" lights yeah I looked at that too. I recently flushed all the lines when I put on the GS calipers, new pads & rotors. So the master cylinder is full. And this just popped up, I had a few hundred miles on the new brake set up before the lights started coming on. unless I somehow have an air bubble that was hiding in the system that found its way to the abs controller.... that's why i find it slightly odd.

12-03-2013	#5
Schrade Join Date: Dec 2012 Location: NC Posts: 1,786	Re: "Service ASR" & 'Service ABS" lights Have you moved the Spark Plug Wires recently? If they're mis-routed, they can emit EMI - same as a nuke, and solid state sensors and nukes don't get along. (me either - I'm fresh out of SPF nuclear strength) __________________ I'm getting my snappics / threads removed blindly as fast as I can, to get in compliance with copyright / license TOS on the boards here (lots of FSM pages and other copyright / license violations on my part; sorry guys). And thanks to all the guys who didn't whine when I posted those FSM copyrighted / licensed stuff in my threads... ( :thumbsup: [b]and to think I complied with a mod's request to delete a pic of him in a Challenge Car in NCM Museum, so he wouldn't get in hot water)[/b] Thanks to several guys here for sending parts FREE; BearlyFlying, WeGone, Geezer, GoldCylon, and more there, TonyD, mike100, fletchusmc... 1990 #2794; 4L60e Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless, Power Effects 3" [IMG]https://lh5.googleusercontent.com/-GHpfzty7DVU/UQn-0Ru2xAI/AAAAAAAAA14/08mz1p4QLD4/s445/Screenshot-5.png[/IMG]

12-03-2013	#6
92whiteZ Join Date: Sep 2013 Location: Los Angeles, CA Posts: 122	Re: "Service ASR" & 'Service ABS" lights these are all good tips. thx I have not moved the spark plug wires recently. I did change the plugs but didn't put new wires on. and it appears all the OEM wire looms, etc are still in place. I will tinker with it this weekend and see if I can consistently recreate the problem.

12-03-2013	#7
Jagdpanzer Join Date: Apr 2007 Location: Northern VA Posts: 2,661	Re: "Service ASR" & 'Service ABS" lights Are all your tires the same diameter? Had the same alarm lights trip on my 94 when taller rear tires are installed. __________________ Phil Wasinger 1994 Torch Red ZR-1 WAZOO Member George Braml Intake

12-09-2013	#8
92whiteZ Join Date: Sep 2013 Location: Los Angeles, CA Posts: 122	Re: "Service ASR" & 'Service ABS" lights So I did some experimenting this weekend. Under normal driving conditions the abs/asr lights stay off. Even under moderate braking. But any big braking where the body shifts heavily to the front, the abs/asr lights illuminate and even the brake light in the gauge cluster will illuminate briefly. Like the fluid is sloshing around in the master cylinder, uncovering the sensor. The MC is full with fresh fluid. Am I correct to presume there is air trapped in the system? I just bought a tech 1a. Is there a means of cycling the abs controller to help move fluid through it? Once the tech 1a arrives I will pull the codes. What is interesting is the lights dissappear every time the car is turned off. And stay off until I make a hard braking move where the weight shifts forward. I am running shelby wheels which what I presume are correct +1 sizing. Thoughts?

12-10-2013	#10
92whiteZ Join Date: Sep 2013 Location: Los Angeles, CA Posts: 122	Re: "Service ASR" & 'Service ABS" lights When I flushed and bleed the brakes I used a snap-on brake machine that has vacuum lines attached to the bleeders and low pressure at the MC with fluid. I don't think any air got trapped in the MC but who knows. I did change the plugs recently and have yet to put dielectric grease in the boots. will do that this weekend. that's a good thought, thanks! I am prob just stuck bleeding the system again. just wanted to check and see if this was similar to anything someone else may have dealt with. thanks everyone!