Hi,
So I have a 2007 GS 350 around 160K miles.

Recently the check VSC message came on along with two warning lights on. ( Sometimes it doesn't come on for few days, sometimes it comes on after I drive my car for around 30s to 60s ) also, I kinda noticed when the weather is hot they come on more often. When these lights come on my AC will only blow warm air - ( the ac condenser stops working, but the air still comes out ) Pic 1.
Pic 1 :

Then after driving a while all these lights and warning message "Check ABS" and "Check VSC" show up. (Then the AC condenser works at random time, sometimes it blow warm air sometimes it works normally - blow cool air) Pic 2
Pic 2:

I tried to pull the error code using my normal OBS reader but I couldn't get any code. I had to go to my mechanic and he used a special device to pull the code, he told me the code states some kinda single lost of something, I will ask him to confirm the error code again. Also, he tried to diagnostic, and found out it should be failing ABS actuator.

The ABS actuator costs around 2k for a new one, I dont know if it worths fixing it, and if anyone saw this issue before?

Thanks.

 

Sounds like you have a corroded battery terminal or a bad ground or a weak alternator

Very rarely the electrical ABS pumps on the GS350's ever go bad, the mechanical ABS pumps on the GS460/LS460 those are prone to going bad. Also because the ABS pumps rarely go bad used ones sell for $50-90 bucks used vs $400-700 used on the GS460's

 

Hi

Is there a easy way to test for bad ground alternator? Thanks

 

So I got these error codes:

U0073 CONTROL MODULE COMMUNICATION BUS OFF
U0100 LOST COMMUNICATION WITH ECM/PCM A

Anyone knows what do these mean? Thanks

 

Most auto parts stores do free alternator tests outside on the vehicle. They quickly hook up a scanner on the battery terminals and it measures the power output

 

My a/c was going in and out while idling, when you start driving it starts to cool again. I had a VSC light on as well, but my dealer told me to replace the thermostat and after that everything worked normal.

 

Sound like the issues I'm having too. Did you notice when did the ac start not working? Was it when the VSC light on?

Thanks.