Trac off light and ABS light

Hi,

The most common cause of the two coming on together is a failed wheel speed sensor. What I would suggest is to check each one of them to see if one has failed. If you look at pic 1 below, it shows how they are located on both the front and back.

To check one only requires a voltmeter or multimeter. Here is a link that shows how it is done:

https://www.2carpros.com/articles/abs-wheel-speed-sensor-test

If you find one is bad, here are the directions for replacement. The attached pics correlate with the directions.

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Front Sensor
1998 Lexus ES 300 V6-3.0L (1MZ-FE)
Speed Sensor, Front
Vehicle Sensors and Switches Sensors and Switches - Brakes and Traction Control Wheel Speed Sensor Service and Repair Procedures Speed Sensor, Front
SPEED SENSOR, FRONT

pic 3

REMOVAL
1. Disconnect speed sensor connector.
a. Remove the fender liner.

pic 4

b. Disconnect the speed sensor connector.

pic 5

2. Remove speed sensor.
a. Remove the bolt, flexible hose and speed sensor harness clams from the shock absorber.
Torque: 29 Nm (21 ft. lbs.)
b. Remove the resin clip and clamp bolt holding the sensor harness to the body.
Torque: 5.4 Nm (48 inch lbs.)
c. Remove the speed sensor from the steering knuckle.
Torque: 7.8 Nm (69 inch lbs.)

INSTALLATION
Installation is in the reverse order of removal. After installation, check speed sensor signal.

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Rear Sensor

1998 Lexus ES 300 V6-3.0L (1MZ-FE)
Speed Sensor, Rear
Vehicle Sensors and Switches Sensors and Switches - Brakes and Traction Control Wheel Speed Sensor Service and Repair Procedures Speed Sensor, Rear
SPEED SENSOR, REAR

pic 6

REMOVAL

pic 7

1. Disconnect speed sensor connector.
a. Remove the seat cushion and seatback.
b. Disconnect the speed sensor connector, and pull out the sensor wire harness with the grommet.

pic 8

2. Remove speed sensor.
a. Remove the 2 clamp bolts holding the sensor wire harness to the body and shock absorber.
Torque: 5.4 Nm (48 inch lbs.)
b. Remove the speed sensor from the axle carrier.
Torque: 7.8 Nm (69 inch lbs.)

INSTALLATION
Installation is in the reverse order of removal.
After installation, check speed sensor signal.

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I hope this helps. Let me know if you have other questions.

Take care,
Joe