Diagnostic Procedure

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

Step	Inspection	Results	Action
1	VERIFY RELATED MODULE DTCs Perform the DTC inspection for the following modules. (See DTC INSPECTION .) 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 [PCM (VIN M)] .) (See DTC TABLE [PCM (VIN Y)] .) (See DTC TABLE [DSC] .)
1		No	Go to the next step.
2	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.
2		No	Adjust the tire pressure or replace with a specified tire and perform the repair completion verification 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 REMOVAL/INSTALLATION .) Is the applicable part normal?	Yes	Refer to [ACTION FOR NONREPEATABLE MALFUNCTIONS] to find the malfunctioning location. (See TROUBLESHOOTING PROCEDURE .)
*3		No	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.
Repair completion verification 1		No	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.

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.