Kia Sorento 2011 Manual Del Usuario página 965

Second Generation XM (2011-2015) / Kia Sorento XM 2011-2015 Service Manual / Brake System
During ABS operation, the brake pedal may vibrate or may not be able to be depressed. Such phenomena are due to intermittent changes in hydraulic pressure
inside the brake line to prevent the wheels from locking and is not an abnormality.
Detecting condition
Trouble Symptoms
Brake operation varies depending on driving conditions and road surface conditions, so diagnosis can
be difficult. However if a normal DTC is displayed, check the following probable cause. When the
problem is still occurring, replace the ESC control module.
Inspection procedures
DTC Inspection
1. Connect the GDS with the data link connector and turn the ignition switch ON.
2. Verify that the DTC code is output.
Is the DTC code output?
▶ Check the power source circuit. ▶ Check the power source circuit.
▶ Erase the DTC and recheck using GDS. ▶ Erase the DTC and recheck using GDS.
3.
Check the power source circuit
1. Disconnect the connector from the ESC control module.
Turn the ignition switch ON, measure the voltage between terminal 29 of the ESC control module harness side connector and body ground.
Specification: approximately B+ Specification: approximately B+
2.
Is the voltage within specification?
▶ Check the ground circuit. ▶ Check the ground circuit.
▶ Check the harness or connector between the fuse (10A) in the engine compartment junction block and the ESC control module. Repair ▶ Check the harness or connector between the fuse (10A) in the engine compartment junction block and the ESC control module. Repair
if necessary.
3.
Check the ground circuit
1. Disconnect the connector from the ESC control module.
Check for continuity between terminals 13, 38 of the ESC control module harness side connector and ground point.
2.
Is there continuity?
▶ Check the wheel speed sensor circuit. ▶ Check the wheel speed sensor circuit.
▶ Repair an open in the wire and ground point. ▶ Repair an open in the wire and ground point.
3.
Check the wheel speed sensor circuit
1. Refer to the DTC troubleshooting procedures.
Is it normal?
▶ Check the hydraulic circuit for leakage. ▶ Check the hydraulic circuit for leakage.
▶ Repair or replace the wheel speed sensor. ▶ Repair or replace the wheel speed sensor.
2.
Check the hydraulic circuit for leakage
1. Refer to the hydraulic lines.
2. Inspect leakage of the hydraulic lines.
Is it normal?
▶ The problem is still occurring, replace the ESC control module. ▶ The problem is still occurring, replace the ESC control module.
▶ Repair the hydraulic lines for leakage. ▶ Repair the hydraulic lines for leakage.
3.
Possible Cause
- Faulty power source circuit
- Faulty wheel speed sensor circuit
- Faulty hydraulic circuit for leakage
- Faulty HECU
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