ABS Does Not Operate (Intermittently)

ABS Does Not Operate (intermittently).

DETECTING CONDITION:

INSPECTION PROCEDURES
DTC INSPECTION
1. Connect the scan tool with the data link connector and turn the ignition switch ON.
2. Verify that the normal code is output.
Is the normal code output?
NO
Check the wheel speed sensor circuit.
YES
Erase the DTC and recheck using scan tool.

CHECK THE WHEEL SPEED SENSOR CIRCUIT.
Refer to the DTC troubleshooting procedures.
Is it normal?
YES
Check the stop lamp switch circuit.
NO
Repair or replace the wheel speed sensor.

CHECK THE STOP LAMP SWITCH CIRCUIT.
1. Check that stop lamp lights up when brake pedal is depressed and turns off when brake pedal is released.
2. Measure the voltage between terminal 34 of the ESC control module harness side connector and body ground when brake pedal is depressed.
Specification approximately B+
Is the voltage within specification?
YES
Check the hydraulic circuit for leakage.
NO
Repair the stop lamp switch. Repair an open in the wire between the ESC control module and the stop lamp switch.





CHECK THE HYDRAULIC CIRCUIT FOR LEAKAGE.
Refer to the hydraulic lines.
Inspect leakage of the hydraulic lines.
Is it normal?
The problem is still occurring, replace the ESC control module.
NO
Repair the hydraulic lines for leakage.