Problem Symptoms Table [10/2015 - 08/2019]

If there are no DTCs but the problem still occurs, check the suspected areas for each problem symptom in the order given in the table below and proceed to the relevant troubleshooting information.

NOTE:

When replacing the skid control ECU assembly, sensors, etc., make sure that the power switch is turned off, the stop light switch assembly is off, and 2 minutes have elapsed since the driver door was closed.

HINT:

Since the hydraulic passage is blocked off by the master cut solenoid during electronically controlled brake system control, there are no kickbacks (vibrations) to the brake pedal, creating little sound even while the ABS is operating.
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.

ELECTRONICALLY CONTROLLED BRAKE SYSTEM

Symptom	Suspected Area	Link
ABS, BA and/or EBD does not operate	Use a chassis dynamometer, etc. to check the electronically controlled brake system operation.	-
	Check again to see if DTCs are output. (If DTCs are output, perform diagnosis based on the DTCs that are output.)	Refer to DTC CHECK / CLEAR [10/2015 - 08/2018] , or refer to DTC CHECK / CLEAR [08/2018 - 08/2019]
	Power source circuit	Refer to DTC C1241-41: Low Battery Positive Voltage; DTC C1242-42: Open in IG1 / IG2 Power Source Circuit [10/2015 - 08/2018] , or refer to DTC C1241-41: Low Battery Positive Voltage; DTC C1242-42: Open in IG1 / IG2 Power Source Circuit [08/2018 - 08/2019]
	Front speed sensor circuit	Refer to DTC C1464-31: Front Speed Sensor RH Circuit; DTC C1465-32: Front Speed Sensor LH Circuit [10/2015 - 08/2018] , or refer to DTC C1464-31: Front Speed Sensor RH Circuit; DTC C1465-32: Front Speed Sensor LH Circuit [08/2018 - 08/2019]
	Rear speed sensor circuit	Refer to DTC C1466-33: Rear Speed Sensor RH Circuit; DTC C1467-34: Rear Speed Sensor LH Circuit [10/2015 - 08/2016] , or refer to DTC C1466-33: Rear Speed Sensor RH Circuit; DTC C1467-34: Rear Speed Sensor LH Circuit [08/2016 - 08/2018] , or refer to DTC C1466-33: Rear Speed Sensor RH Circuit; DTC C1467-34: Rear Speed Sensor LH Circuit [08/2018 - 08/2019]
	Check the brake actuator assembly using the Techstream. (Check brake actuator assembly operation using the Active Test function.) If abnormal, check the hydraulic circuit for leaks.	Refer to ON-VEHICLE INSPECTION [10/2015 - 08/2018] , or refer to ON-VEHICLE INSPECTION [08/2018 - ]
	If the symptoms still occur even after the above suspected areas have been inspected and proved to be normal, replace the skid control ECU assembly.	Refer to REMOVAL [10/2015 - 08/2016] , or refer to REMOVAL [08/2016 - 03/2018] , or refer to REMOVAL [03/2018 - 08/2019]
ABS, BA and/or EBD does not operate efficiently	Check again to see if DTCs are output. (If DTCs are output, perform diagnosis based on the DTCs that are output.)	Refer to DTC CHECK / CLEAR [10/2015 - 08/2018] , or refer to DTC CHECK / CLEAR [08/2018 - 08/2019]
	Front speed sensor circuit	Refer to DTC C1464-31: Front Speed Sensor RH Circuit; DTC C1465-32: Front Speed Sensor LH Circuit [10/2015 - 08/2018] , or refer to DTC C1464-31: Front Speed Sensor RH Circuit; DTC C1465-32: Front Speed Sensor LH Circuit [08/2018 - 08/2019]
	Rear speed sensor circuit	Refer to DTC C1466-33: Rear Speed Sensor RH Circuit; DTC C1467-34: Rear Speed Sensor LH Circuit [10/2015 - 08/2016] , or refer to DTC C1466-33: Rear Speed Sensor RH Circuit; DTC C1467-34: Rear Speed Sensor LH Circuit [08/2016 - 08/2018] , or refer to DTC C1466-33: Rear Speed Sensor RH Circuit; DTC C1467-34: Rear Speed Sensor LH Circuit [08/2018 - 08/2019]
	Check the brake actuator assembly using the Techstream. (Check brake actuator assembly operation using the Active Test function.) If abnormal, check the hydraulic circuit for leaks.	Refer to ON-VEHICLE INSPECTION [10/2015 - 08/2018] , or refer to ON-VEHICLE INSPECTION [08/2018 - ]
	If the symptoms still occur even after the above suspected areas have been inspected and proved to be normal, replace the skid control ECU assembly.	Refer to REMOVAL [10/2015 - 08/2016] , or refer to REMOVAL [08/2016 - 03/2018] , or refer to REMOVAL [03/2018 - 08/2019]
ABS warning light abnormal (Remains on)	ABS warning light circuit	Refer to ABS Warning Light Remains ON [10/2015 - 08/2018] , or refer to ABS Warning Light Remains ON [08/2018 - ]
ABS warning light abnormal (Remains on)	Skid control ECU assembly	Refer to REMOVAL [10/2015 - 08/2016] , or refer to REMOVAL [08/2016 - 03/2018] , or refer to REMOVAL [03/2018 - 08/2019]
ABS warning light abnormal (Does not come on)	ABS warning light circuit	Refer to ABS Warning Light does not Come ON [10/2015 - 08/2018] , or refer to ABS Warning Light does not Come ON [08/2018 - ]
ABS warning light abnormal (Does not come on)	Skid control ECU assembly	Refer to REMOVAL [10/2015 - 08/2016] , or refer to REMOVAL [08/2016 - 03/2018] , or refer to REMOVAL [03/2018 - 08/2019]
Brake warning light / red (malfunction) abnormal (Remains on)	Brake fluid level warning switch circuit	Refer to DTC C1202-68: Master Reservoir Level Malfunction [10/2015 - 08/2018] , or refer to DTC C1202-68: Master Reservoir Level Malfunction [08/2018 - 08/2019]
	Brake warning light / red (malfunction) circuit	Refer to Brake Warning Light Remains ON [10/2015 - 08/2018] , or refer to Brake Warning Light Remains ON [08/2018 - ]
	Skid control ECU assembly	Refer to REMOVAL [10/2015 - 08/2016] , or refer to REMOVAL [08/2016 - 03/2018] , or refer to REMOVAL [03/2018 - 08/2019]
Brake warning light / red (malfunction) abnormal (Does not come on)	Brake warning light / red (malfunction) circuit	Refer to Brake Warning Light does not Come ON [10/2015 - 08/2018] , or refer to Brake Warning Light does not Come ON [08/2018 - ]
	Skid control ECU assembly	Refer to REMOVAL [10/2015 - 08/2016] , or refer to REMOVAL [08/2016 - 03/2018] , or refer to REMOVAL [03/2018 - 08/2019]
VSC and/or TRAC does not operate	Check again to see if DTCs are output. (If DTCs are output, perform diagnosis based on the DTCs that are output.)	Refer to DTC CHECK / CLEAR [10/2015 - 08/2018] , or refer to DTC CHECK / CLEAR [08/2018 - 08/2019]
	Power source circuit	Refer to DTC C1241-41: Low Battery Positive Voltage; DTC C1242-42: Open in IG1 / IG2 Power Source Circuit [10/2015 - 08/2018] , or refer to DTC C1241-41: Low Battery Positive Voltage; DTC C1242-42: Open in IG1 / IG2 Power Source Circuit [08/2018 - 08/2019]
	Check the hydraulic circuit for leaks.	-
	Front speed sensor circuit	Refer to DTC C1464-31: Front Speed Sensor RH Circuit; DTC C1465-32: Front Speed Sensor LH Circuit [10/2015 - 08/2018] , or refer to DTC C1464-31: Front Speed Sensor RH Circuit; DTC C1465-32: Front Speed Sensor LH Circuit [08/2018 - 08/2019]
	Rear speed sensor circuit	Refer to DTC C1466-33: Rear Speed Sensor RH Circuit; DTC C1467-34: Rear Speed Sensor LH Circuit [10/2015 - 08/2016] , or refer to DTC C1466-33: Rear Speed Sensor RH Circuit; DTC C1467-34: Rear Speed Sensor LH Circuit [08/2016 - 08/2018] , or refer to DTC C1466-33: Rear Speed Sensor RH Circuit; DTC C1467-34: Rear Speed Sensor LH Circuit [08/2018 - 08/2019]
	Yaw rate and acceleration sensor circuit (Power supply malfunction)	Refer to DTC C1381-97: Acceleration Sensor Power Supply Voltage Malfunction [10/2015 - 08/2018] , or refer to DTC C1381-97: Acceleration Sensor Power Supply Voltage Malfunction [08/2018 - 08/2019]
	Yaw rate and acceleration sensor circuit (Stuck and signal malfunction)	Refer to DTC C1234-34: Yaw Rate Sensor Malfunction; DTC C1243-43: Acceleration Sensor Stuck Malfunction; DTC C1244-44: Open or Short in Acceleration Sensor Circuit; DTC C1245-45: Acceleration Sensor Output Malfunction [10/2015 - 08/2018] , or refer to DTC C1234-34: Yaw Rate Sensor Malfunction; DTC C1243-43: Acceleration Sensor Stuck Malfunction; DTC C1244-44: Open or Short in Acceleration Sensor Circuit; DTC C1245-45: Acceleration Sensor Output Malfunction [08/2018 - 08/2019]
	Steering angle sensor circuit	Refer to DTC C1231-31: Steering Angle Sensor Circuit Malfunction [10/2015 - 08/2018] , or refer to DTC C1231-31: Steering Angle Sensor Circuit Malfunction [08/2018 - 08/2019]
	If the symptoms still occur even after the above suspected areas have been inspected and proved to be normal, replace the skid control ECU assembly.	Refer to REMOVAL [10/2015 - 08/2016] , or refer to REMOVAL [08/2016 - 03/2018] , or refer to REMOVAL [03/2018 - 08/2019]
Brake warning light / yellow (minor malfunction) abnormal (Remains on)	Brake warning light / yellow (minor malfunction) circuit	Refer to Brake Control Warning Light Remains ON [10/2015 - 08/2018] , or refer to Brake Control Warning Light Remains ON [08/2018 - ]
	Skid control ECU assembly	Refer to REMOVAL [10/2015 - 08/2016] , or refer to REMOVAL [08/2016 - 03/2018] , or refer to REMOVAL [03/2018 - 08/2019]
Brake warning light / yellow (minor malfunction) abnormal (Does not come on)	Brake warning light / yellow (minor malfunction) circuit	Refer to Brake Control Warning Light does not Come ON [10/2015 - 08/2018] , or refer to Brake Control Warning Light does not Come ON [08/2018 - ]
	Skid control ECU assembly	Refer to REMOVAL [10/2015 - 08/2016] , or refer to REMOVAL [08/2016 - 03/2018] , or refer to REMOVAL [03/2018 - 08/2019]
Slip indicator light abnormal (Remains on)	Slip indicator light circuit	Refer to Slip Indicator Light Remains ON [10/2015 - 08/2018] , or refer to Slip Indicator Light Remains ON [08/2018 - ]
Slip indicator light abnormal (Remains on)	Skid control ECU assembly	Refer to REMOVAL [10/2015 - 08/2016] , or refer to REMOVAL [08/2016 - 03/2018] , or refer to REMOVAL [03/2018 - 08/2019]
Slip indicator light abnormal (Does not come on)	Slip indicator light circuit	Refer to Slip Indicator Light does not Come ON [10/2015 - 08/2018] , or refer to Slip Indicator Light does not Come ON [08/2018 - ]
Slip indicator light abnormal (Does not come on)	Skid control ECU assembly	Refer to REMOVAL [10/2015 - 08/2016] , or refer to REMOVAL [08/2016 - 03/2018] , or refer to REMOVAL [03/2018 - 08/2019]
VSC OFF switch (Combination switch assembly) abnormal	VSC OFF switch (combination switch assembly) circuit	Refer to VSC OFF Switch Circuit [10/2015 - 08/2018] , or refer to VSC OFF Switch Circuit [08/2018 - ]
VSC OFF switch (Combination switch assembly) abnormal	Skid control ECU assembly	Refer to REMOVAL [10/2015 - 08/2016] , or refer to REMOVAL [08/2016 - 03/2018] , or refer to REMOVAL [03/2018 - 08/2019]
Brake hold standby indicator light abnormal	Brake hold operation conditions are not met.	Refer to PROCEDURE - Step 1 [10/2015 - 08/2016] , or refer to PROCEDURE - Step 1 [08/2018 - 08/2019]
	Brake hold standby indicator light circuit	Refer to Brake Hold Standby Indicator Light Circuit [10/2015 - 08/2018] , or refer to Brake Hold Standby Indicator Light Circuit [08/2018 - ]
	Skid control ECU assembly	Refer to REMOVAL [10/2015 - 08/2016] , or refer to REMOVAL [08/2016 - 03/2018] , or refer to REMOVAL [03/2018 - 08/2019]
Brake hold operated indicator light abnormal	Brake hold operation conditions are not met.	Refer to PROCEDURE - Step 1 [10/2015 - 12/2017] , or refer to PROCEDURE - Step 1 [08/2018 - 08/2019]
	Brake hold operated indicator light circuit	Refer to Brake Hold Operated Indicator Light Circuit [10/2015 - 08/2018] , or refer to Brake Hold Operated Indicator Light Circuit [08/2018 - ]
	Skid control ECU assembly	Refer to REMOVAL [10/2015 - 08/2016] , or refer to REMOVAL [08/2016 - 03/2018] , or refer to REMOVAL [03/2018 - 08/2019]
DTC check cannot be done	Check again to see if DTCs are output. (If DTCs are output, perform diagnosis based on the DTCs that are output.)	Refer to DTC CHECK / CLEAR [10/2015 - 08/2018] , or refer to DTC CHECK / CLEAR [08/2018 - 08/2019]
	TC and CG terminal circuit	Refer to TC and CG Terminal Circuit [10/2015 - 08/2019]
	If the symptoms still occur even after the above suspected areas have been inspected and proved to be normal, replace the skid control ECU assembly.	Refer to REMOVAL [10/2015 - 08/2016] , or refer to REMOVAL [08/2016 - 03/2018] , or refer to REMOVAL [03/2018 - 08/2019]
Meter buzzer abnormal	Meter buzzer circuit	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ]
Meter buzzer abnormal	Skid control ECU assembly	Refer to REMOVAL [10/2015 - 08/2016] , or refer to REMOVAL [08/2016 - 03/2018] , or refer to REMOVAL [03/2018 - 08/2019]
Brake pedal is hard to depress	Refer to the procedure for "Brake Pedal is Hard to Depress"	Refer to Brake Pedal is Hard to Depress [10/2015 - 08/2018] , or refer to Brake Pedal is Hard to Depress [08/2018 - 08/2019]