Lexus Troubleshooting Questions? Ask a Lexus Expert
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As you probably already know, the ABS and VSC systems are linked. The first thing you should do is retrieve any error codes that might be stored in the on-boad compputer module. Those error codes will tell us which circuits are affected, which will give us direction as to what's wrong with the system.
To retrieve codes from the ABS/VSC system, jumper terminals 4 and 13 of the DLC as shown in attached graphic 1. Then, turn the ignition on and read the codes by counting the flashes of the ABS light in the dash as described in attached graphic 2.
Please let me know as soon as you have the code number(s) so we can continue.