ABS Does Not Operate

ABS Does Not Operate.

DETECTING CONDITION





INSPECTION PROCEDURES

DTC INSPECTION
1. Connect the Hi-Scan (pro) 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 power source circuit.

YES
> Erase the DTC and recheck using Hi-Scan (pro).

CHECK THE POWER SOURCE CIRCUIT
1. Disconnect the connector from the ABS control module.
2. Turn the ignition switch ON, measure the voltage between terminal 4 of the ABS control module harness side connector and body ground.

Specification: approximately B+

Is the voltage within specification?

YES
> Check the ground circuit.

NO
> Check the harness or connector between the fuse (10A) in the engine compartment junction block and the ABS control module. Repair if necessary.





CHECK THE GROUND CIRCUIT
1. Disconnect the connector from the ABS control module.
2. Check for continuity between terminals 8, 24 of the ABS control module harness side connector and ground point.
Is there continuity?

YES
> Check the wheel speed sensor circuit.

NO
> Repair an open in the wire and ground point.





CHECK THE WHEEL SPEED SENSOR CIRCUIT.
Refer to the DTC troubleshooting procedures.
Is it normal?

>YES
> Check the hydraulic circuit for leakage.

>NO
> Repair or replace the wheel speed sensor.

CHECK THE HYDRAULIC CIRCUIT FOR LEAKAGE.
Refer to the hydraulic lines.
Inspect leakage of the hydraulic lines.

Is it normal?

>YES
> The problem is still occurring, replace the ABS control module.

>NO
> Repair the hydraulic lines for leakage.