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GS460 Check abs, vsc, vgrs, power str, brake malfunction etc

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GS460 Check abs, vsc, vgrs, power str, brake malfunction etc

 
Old 05-15-19, 08:33 AM
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lottadik
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Default GS460 Check abs, vsc, vgrs, power str, brake malfunction etc

So since i purchased the car i have on occasion got the check vsc abs light. Shut it down and restart it goes away.
Now it seems on longer hwy drives it comes on more frequently.
NOW the whole dash is christmas treeing.

I tried reading the codes but nothing comes up in the faults on my bluetooth scanner. I will try my snap on modus today but not familiar with these systems.
ANy help is much appreciated and heres to hoping its not the brake booster because it would be past the extended service program age.
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Old 05-15-19, 09:08 AM
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It helps to start any help request by providing basic information if you want assistance. What model year, how many miles, any recent service, etc?

Likely the battery or alternator, or both. How old is your battery? Take it to any auto parts store and have them test the charging system for free.
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Old 05-15-19, 09:14 AM
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Well title says gs460 so that should give the year since they were only made 2 years right?
The video obvisouly has the miles on the odo.
Battery and charging system is good.
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Old 05-15-19, 10:13 AM
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Long shot, but could be your alternator on its way out the door. My 460 gave the VSC light a while back, but it ended up being a weak battery; once I got it replaced, I was good to go. My SC400, however, lit up like a Christmas tree when the alternator was dying a slow death. Maybe test the battery and see if it's weak? If not, then move on to the alternator. Best of luck.
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Old 05-15-19, 10:50 AM
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Usually a lot of these codes together (ABS, VSC, EPS, VGRS, AFS) means malfunction of vehicle speed calculation. E.g. defected any wheel speed sensor, broken wiring harness or faulted Brake-ECU.

Last edited by Micro; 05-15-19 at 11:04 AM.
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Old 05-15-19, 11:04 AM
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Originally Posted by Micro View Post
Usually a lot of these codes together (ABS, VSC, EPS, AFS) means malfunction of vehicle speed calculation.
E.g. defected any wheel speed sensor, wiring harness or brake ECU.
Does these cars have a single vss? Ive been told the same thing but cant locate it. Only find abs wheel speed sensors.
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Old 05-15-19, 11:16 AM
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Originally Posted by lottadik View Post
Does these cars have a single vss? Ive been told the same thing but cant locate it. Only find abs wheel speed sensors.
There is no single VSS. Speed is calculated only via wheel rotation sensors.
Most likely causes are broken wire near a sensor or corrosion in a connector.

Last edited by Micro; 05-15-19 at 12:05 PM.
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Old 05-15-19, 11:49 AM
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So this start up all lights flashing on dash. Hooked up scanner and just about every abs codes came up.
Voltage was 12 off, 14 idle.
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Old 05-15-19, 12:33 PM
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Have you tried erasing all these codes?
By disconnecting the battery for a few minutes (or with DTC tool).
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Old 05-15-19, 12:36 PM
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Originally Posted by Micro View Post
Have you tried erasing all these codes?
By disconnecting the battery for a few minutes (or with DTC tool).
Problem is the codes go away and come back.
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Old 05-15-19, 12:57 PM
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Probably C1241 is most primary DTC in this list.
First check the power supply circuit for the Brake ECU.
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Old 05-15-19, 09:52 PM
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Looks like a loose connection somewhere that connects all the ECUs together
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Old 05-16-19, 04:47 AM
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12.00 is a bit low if measured at the battery and not through the scanner. But idle voltage is good! On your scanner are you able to pull chart on the alternator and see how the voltage sine wave is? I wonder if the alternator voltage regulator is any good, meaning at idle it shows fine but on throttle it does funky issues.

I would say keep driving the car for a bit, these 3GS sometimes do funky error codes once they sit for long periods.

If your codes dont go away, then it may seem to be bad ecu or connection. There are places that rebuild ecu for cheap, so its nothing to be concerned about.
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Old 05-16-19, 09:21 PM
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Originally Posted by lottadik View Post
So since i purchased the car i have on occasion got the check vsc abs light. Shut it down and restart it goes away.
Now it seems on longer hwy drives it comes on more frequently.
NOW the whole dash is christmas treeing.
https://www.youtube.com/watch?v=76HujtaajTI

I tried reading the codes but nothing comes up in the faults on my bluetooth scanner. I will try my snap on modus today but not familiar with these systems.
ANy help is much appreciated and heres to hoping its not the brake booster because it would be past the extended service program age.


While it may sound silly... I had all the same lights come on once in my GS460... I Googled it and the result was..... my petrol (gas) cap was not tight and it had depressurised the fuel system which caused all the stability and radar cruise etc to cease to work. Once I tightened the gas cap and drove for 20 minutes or so, stopped and restarted the car all of the lights went off and I have had no problems since. I hope this helps.

Last edited by NZKev; 05-16-19 at 09:25 PM.
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Old 05-17-19, 12:07 PM
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My 06 GS430 had this happen a few times before the alternator finally quit and the lights just stayed on.
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