Diagnostic Procedure

ABS OR TCS OPERATES FREQUENTLY/TCS DOES NOT WORK CORRECTLY DIAGNOSTIC PROCEDURE

Step

Inspection

Results

Action

VERIFY RELATED MODULE DTCs

Perform the DTC inspection for the following modules. (See DTC INSPECTION .)
- ECM (e-SKYACTIV PHEV)/PCM (except e-SKYACTIV PHEV)
- Electronically controlled brake unit
Are any DTCs displayed?

Yes

Repair or replace the malfunctioning location according to the applicable DTC troubleshooting.
(See DTC TABLE [ECM (e-SKYACTIV PHEV)] .)
(See DTC TABLE [PCM (PYUL)] .)
DTC TABLE [PCM (H3T)]
(See DTC TABLE [PCM (H3T)] .)
(See DTC TABLE [DSC] .)

Go to the next step.

VERIFY TIRE CONDITION

Verify the tire pressure and specifications of the tire.
Are the tire pressure and specifications of the tire normal? (Refer to [WHEEL AND TIRE SPECIFICATION ] ).

Yes

Go to the next step.

Adjust the tire pressure or replace with a specified tire and perform the repair completion verification 1.

⁽¹⁾3

INSPECT ABS WHEEL-SPEED SENSOR FOR MALFUNCTION

Inspect the applicable parts for the following.
- ABS wheel-speed sensor installation condition
- ABS sensor rotor installation condition (if installed at an angle, it may cause output of abnormal wave pattern at high speeds)
- ABS sensor rotor damage (Refer to [FRONT ABS WHEEL-SPEED SENSOR INSPECTION ] ). (Refer to [REAR ABS WHEEL-SPEED SENSOR INSPECTION ] ).
Is the applicable part normal?

Yes

Refer to [ACTION FOR NON-REPEATABLE MALFUNCTION ] to find the malfunctioning location.

Repair or replace the malfunctioning location and perform the repair completion verification 1.
(Refer to [FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION ] ).
(Refer to [REAR ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION ] ).

Repair completion verification 1

VERIFY IF MALFUNCTION CAUSE IS CORRECTED

Install/connect the part removed/disconnected during the troubleshooting procedure.
Has the malfunction symptom been eliminated?

Yes

Complete the symptom troubleshooting.
Explain repair contents to customer.

Refer to the CAN (controller area network) malfunction diagnosis flow to inspect for a CAN communication error.
(See MALFUNCTION DIAGNOSIS FLOW [CONTROLLER AREA NETWORK (CAN)] .)
If the CAN communication is normal, perform the diagnosis from Step 1.

⁽¹⁾

When performing an asterisked (*) troubleshooting inspection, first verify the damage and connection status of the connectors and terminals, then perform the inspection while shaking the wiring harness (cause of malfunction may be due to poor connection of connectors, terminals, or wiring harness). If there is a malfunction in the connectors or terminals, securely connect, repair, or perform replacement.