Problem Symptoms Table

If a normal code is displayed during the DTC check but the problem still occurs, check the circuits for each problem symptom in the order given in the table below .

NOTE: When replacing the skid control ECU, sensor, etc., turn the ignition switch off.

HINT:

Inspect the fuses and relays before investigating the suspected areas as shown in the table below.
Inspect each malfunction circuit in numerical order for the corresponding symptoms.

ANTI-LOCK BRAKE SYSTEM:

ANTI-LOCK BRAKE SYSTEM

Symptom	Suspected Area	See
ABS does not operate	1. Check the DTC reconfirming that the normal system code is output	DTC CHECK / CLEAR
	2. IG power source circuit	DTC C1241/41 LOW BATTERY POSITIVE VOLTAGE OR ABNORMALLY HIGH BATTERY POSITIVE VOLTAGE
	3. Front speed sensor circuit	DTC C0200/31 RIGHT FRONT WHEEL SPEED SENSOR SIGNAL MALFUNCTION; DTC C0205/32 LEFT FRONT WHEEL SPEED SENSOR SIGNAL MALFUNCTION; DTC C1271/71 LOW OUTPUT SIGNAL OF FRONT SPEED SENSOR RH (TEST MODE DTC); DTC C1272/72 LOW OUTPUT SIGNAL OF FRONT SPEED SENSOR LH (TEST MODE DTC); DTC C1275/75 ABNORMAL CHANGE IN OUTPUT SIGNAL OF FRONT SPEED SENSOR RH (TEST MODE DTC); DTC C1276/76 ABNORMAL CHANGE IN OUTPUT SIGNAL OF FRONT SPEED SENSOR LH (TEST MODE DTC); DTC C1330/35 RIGHT FRONT SPEED SENSOR CIRCUIT; DTC C1331/36 LEFT FRONT SPEED SENSOR CIRCUIT
	4. Rear speed sensor circuit	DTC C0210/33 RIGHT REAR WHEEL SPEED SENSOR SIGNAL MALFUNCTION; DTC C0215/34 LEFT REAR WHEEL SPEED SENSOR SIGNAL MALFUNCTION; DTC C1273/73 LOW OUTPUT SIGNAL OF REAR SPEED SENSOR RH (TEST MODE DTC); DTC C1274/74 LOW OUTPUT SIGNAL OF REAR SPEED SENSOR LH (TEST MODE DTC); DTC C1277/77 ABNORMAL CHANGE IN OUTPUT SIGNAL OF REAR SPEED SENSOR RH (TEST MODE DTC); DTC C1278/78 ABNORMAL CHANGE IN OUTPUT SIGNAL OF REAR SPEED SENSOR LH (TEST MODE DTC); DTC C1332/38 RIGHT REAR SPEED SENSOR CIRCUIT; DTC C1333/39 LEFT REAR SPEED SENSOR CIRCUIT
	5. Check the brake actuator assembly with Techstream (Check brake actuator assembly operation using the Active Test function) If abnormal, check the hydraulic circuit for leakage	DTC C0210/33 Right Rear Wheel Speed Sensor Signal Malfunction; DTC C0215/34 Left Rear Wheel Speed Sensor Signal Malfunction; DTC C1273/73 Low Output Signal of Rear Speed Sensor RH (Test Mode DTC); DTC C1274/74 Low Output Signal of Rear Speed Sensor LH (Test Mode DTC); DTC C1277/77 Abnormal Change in Output Signal of Rear Speed Sensor RH (Test Mode DTC); DTC C1278/78 Abnormal Change in Output Signal of Rear Speed Sensor LH (Test Mode DTC); DTC C1332/38 Right Rear Speed Sensor Circuit; DTC C1333/39 Left Rear Speed Sensor Circuit
	6. If the symptoms still occur even after the above circuits in suspected areas have been inspected and proved to be normal, replace the brake actuator assembly (skid control ECU)	BRAKE ACTUATOR (FOR BOSCH MADE)
ABS does not operate efficiently	1. Check the DTC reconfirming that the normal system code is output.	DTC CHECK / CLEAR
	2. Front speed sensor circuit	DTC C0200/31 RIGHT FRONT WHEEL SPEED SENSOR SIGNAL MALFUNCTION; DTC C0205/32 LEFT FRONT WHEEL SPEED SENSOR SIGNAL MALFUNCTION; DTC C1271/71 LOW OUTPUT SIGNAL OF FRONT SPEED SENSOR RH (TEST MODE DTC); DTC C1272/72 LOW OUTPUT SIGNAL OF FRONT SPEED SENSOR LH (TEST MODE DTC); DTC C1275/75 ABNORMAL CHANGE IN OUTPUT SIGNAL OF FRONT SPEED SENSOR RH (TEST MODE DTC); DTC C1276/76 ABNORMAL CHANGE IN OUTPUT SIGNAL OF FRONT SPEED SENSOR LH (TEST MODE DTC); DTC C1330/35 RIGHT FRONT SPEED SENSOR CIRCUIT; DTC C1331/36 LEFT FRONT SPEED SENSOR CIRCUIT
	3. Rear speed sensor circuit	DTC C0210/33 RIGHT REAR WHEEL SPEED SENSOR SIGNAL MALFUNCTION; DTC C0215/34 LEFT REAR WHEEL SPEED SENSOR SIGNAL MALFUNCTION; DTC C1273/73 LOW OUTPUT SIGNAL OF REAR SPEED SENSOR RH (TEST MODE DTC); DTC C1274/74 LOW OUTPUT SIGNAL OF REAR SPEED SENSOR LH (TEST MODE DTC); DTC C1277/77 ABNORMAL CHANGE IN OUTPUT SIGNAL OF REAR SPEED SENSOR RH (TEST MODE DTC); DTC C1278/78 ABNORMAL CHANGE IN OUTPUT SIGNAL OF REAR SPEED SENSOR LH (TEST MODE DTC); DTC C1332/38 RIGHT REAR SPEED SENSOR CIRCUIT; DTC C1333/39 LEFT REAR SPEED SENSOR CIRCUIT
	4. Stop light switch circuit	DTC C1249/49 OPEN IN STOP LIGHT SWITCH CIRCUIT
	5. Check the brake actuator assembly with Techstream (Check brake actuator assembly operation using the Active Test function)	DTC C0210/33 RIGHT REAR WHEEL SPEED SENSOR SIGNAL MALFUNCTION; DTC C0215/34 LEFT REAR WHEEL SPEED SENSOR SIGNAL MALFUNCTION; DTC C1273/73 LOW OUTPUT SIGNAL OF REAR SPEED SENSOR RH (TEST MODE DTC); DTC C1274/74 LOW OUTPUT SIGNAL OF REAR SPEED SENSOR LH (TEST MODE DTC); DTC C1277/77 ABNORMAL CHANGE IN OUTPUT SIGNAL OF REAR SPEED SENSOR RH (TEST MODE DTC); DTC C1278/78 ABNORMAL CHANGE IN OUTPUT SIGNAL OF REAR SPEED SENSOR LH (TEST MODE DTC); DTC C1332/38 RIGHT REAR SPEED SENSOR CIRCUIT; DTC C1333/39 LEFT REAR SPEED SENSOR CIRCUIT
	6. If the symptoms still occur even after the above circuits in suspected areas have been inspected and proved to be normal, replace the brake actuator assembly (skid control ECU)	BRAKE ACTUATOR (FOR BOSCH MADE)
ABS warning light malfunction (Remains on)	1. ABS warning light circuit	ABS WARNING LIGHT REMAINS ON
ABS warning light malfunction (Remains on)	2. Brake actuator assembly (skid control ECU)	BRAKE ACTUATOR (FOR BOSCH MADE)
ABS warning light malfunction (Does not come on)	1. ABS warning light circuit	ABS WARNING LIGHT DOES NOT COME ON
Brake warning light malfunction (Remains on)	1. Brake warning light circuit	BRAKE WARNING LIGHT REMAINS ON
Brake warning light malfunction (Remains on)	2. Brake actuator assembly (skid control ECU)	BRAKE ACTUATOR (FOR BOSCH MADE)
Brake warning light malfunction (Does not come on)	1. Brake warning light circuit	BRAKE WARNING LIGHT DOES NOT COME ON
Brake warning light malfunction (Does not come on)	2. Brake actuator assembly (skid control ECU)	BRAKE ACTUATOR (FOR BOSCH MADE)
ABS sensor DTC check cannot be done	1. Check the DTC again and make sure that the normal system code is output	DTC CHECK / CLEAR
	2. TS and CG terminal circuit	TS AND CG TERMINAL CIRCUIT
	3. TC and CG terminal circuit	TC AND CG TERMINAL CIRCUIT
	4. If the symptoms still occur even after the above circuits in suspected areas have been inspected and proved to be normal, replace the brake actuator assembly (skid control ECU)	BRAKE ACTUATOR (FOR BOSCH MADE)