Lexus Troubleshooting Questions? Ask a Lexus Expert
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Did you bench bleed the master cylinder before installing it on the car?
If all air is out of the master cylinder and still have a soft pedal, then you have air trapped in the abs unit. Did you used a scan tool to activate each solenoid inside the abs pump?
Yes, the connection is direct to the OBD diagnostic connector. I am not 100% sure the auto parts scan tool will work as I have never used them. I always had access to the dealers scan tool when I work there. Some scan tools they use are just code reading only with no active testing. You will have to ask them if the scan tool they use have access to active test the abs system.