2001LC
SILVER Star
I always get ABS and/or brake light if a brake issue like fluid level, pressure, pump, motor, acuumlator, wheel speed sensor, etc.
First thing that comes to mind is it all started after changing the spark plugs. I always look for issues that may have been caused by last job first thing. Since no misfire code I'll assume plugs and coils installed correctly.
Next would be vacuum lines. In pulling coils & plug air box comes off, and so vacuum hoses are unplug or disturbed. A 01 with 171K miles would pretty much need all new vacuum lines. This includes PVC grommet, valve and both hoses. But these would not give DTC your getting. But we've a double line coming off vane pump idle control. These line might set of the DTC you have. They will without doubt set of VSC ect, most anything will. Often time these line are not plugged back in as we button up after pulling air box. But even if plugged back in they've been disturbed. Remove/disturb old rubber vacuum lines, they tend to crack and no longer seal well, cold weather also will worsen this. Sometimes we can cut off first few inch of a rubber hose/line as a temporary fix too test.
Additionally, it's best practice to disconnect battery when removing any electrical connection. This is true of the MAF. I always like to clean and grease battery post & clamps when cleaning MAF & throttle body. I start by disconnect negative battery post and last thing I do is connect negative post. I make sure battery disconnected for 20 minutes minimum, this reset ECM. Toyota engineers are now (200 series) advising to disconnect battery when using external charger on battery. I feel this a good Idea for the 100 also.
Zero point can also be done by driving in straight line at 35 MPD for a few 100 yards. But I'd have to go back and look at my 01 FSM to see if that worked.
I'd look over all these things and see if any issue show up that need attention. Also take a hard look at front end. i.e. steering rack, TRE, FDS (CV's), wheel bearing, ball joints, etc. for play. Once good on this basic stuff, then clear DTC's. If DTC come back follow the digicnotic tree in FSM to the letter.
BTW: I change the double vacuum line on about every rig, even low mile 07's these days, with OEM replacement.
Good luck hopefully and easy fix.
BTW: I use www.partsouq.com a lot for the diagrams by punching in my VIN #. It can help when trying to find parts used in conjunction with the FSM.
First thing that comes to mind is it all started after changing the spark plugs. I always look for issues that may have been caused by last job first thing. Since no misfire code I'll assume plugs and coils installed correctly.
Next would be vacuum lines. In pulling coils & plug air box comes off, and so vacuum hoses are unplug or disturbed. A 01 with 171K miles would pretty much need all new vacuum lines. This includes PVC grommet, valve and both hoses. But these would not give DTC your getting. But we've a double line coming off vane pump idle control. These line might set of the DTC you have. They will without doubt set of VSC ect, most anything will. Often time these line are not plugged back in as we button up after pulling air box. But even if plugged back in they've been disturbed. Remove/disturb old rubber vacuum lines, they tend to crack and no longer seal well, cold weather also will worsen this. Sometimes we can cut off first few inch of a rubber hose/line as a temporary fix too test.
Additionally, it's best practice to disconnect battery when removing any electrical connection. This is true of the MAF. I always like to clean and grease battery post & clamps when cleaning MAF & throttle body. I start by disconnect negative battery post and last thing I do is connect negative post. I make sure battery disconnected for 20 minutes minimum, this reset ECM. Toyota engineers are now (200 series) advising to disconnect battery when using external charger on battery. I feel this a good Idea for the 100 also.
Zero point can also be done by driving in straight line at 35 MPD for a few 100 yards. But I'd have to go back and look at my 01 FSM to see if that worked.
I'd look over all these things and see if any issue show up that need attention. Also take a hard look at front end. i.e. steering rack, TRE, FDS (CV's), wheel bearing, ball joints, etc. for play. Once good on this basic stuff, then clear DTC's. If DTC come back follow the digicnotic tree in FSM to the letter.
BTW: I change the double vacuum line on about every rig, even low mile 07's these days, with OEM replacement.
Good luck hopefully and easy fix.
BTW: I use www.partsouq.com a lot for the diagrams by punching in my VIN #. It can help when trying to find parts used in conjunction with the FSM.
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