ABS Does Not Operate

ABS Does Not Operate




DETECTING CONDITION






INSPECTION PROCEDURES
DTC INSPECTION
1. Connect the Scan Tool with the data link connector and turn the ignition switch ON.
2. Is the ABS MIL on?
NO
> Check the power source circuit.
YES
> Read DTC and troubleshoot said DTC.

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 18 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 1,4 of the ABS control module harness side connector and ground point.
Is there continuity?
YES
> No further action is required.
NO
> Repair an open in the wire and ground point.





CHECK THE HYDRAULIC CIRCUIT.
Refer to the DTC troubleshooting procedures.
Is the system operating to specifications?
> Check for DTC trouble codes.
> Check the hydraulic circuit for leakage.

CHECK THE HYDRAULIC CIRCUIT FOR LEAKAGE.
Refer to the hydraulic lines.
Inspect leakage of the hydraulic lines.
Is the system operating to specifications?
> The problem is still occurring, replace the ABS control module.
> Replace the leaking hydraulic lines.