Problem Symptoms Table

If no DTCs are displayed during the DTC check but the problem still occurs, check the circuits for each problem symptom in the order given in DTC DETECTION CONDITION AND TROUBLE AREA REFERENCE TABLE and proceed to the relevant troubleshooting reference.

Fig 1: Identifying DTC Blinking Pattern

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NOTE: When replacing the brake actuator or sensor, turn the ignition switch off.

ANTI-LOCK BRAKE SYSTEM

DTC DETECTION CONDITION AND TROUBLE AREA REFERENCE TABLE

Symptom	Suspected area	Reference
ABS and/or EBD does not operate	Check DTC again and make sure that normal system code displayed.	DTC CHECK/CLEAR
	IG power source circuit	DTC C1241/41 Low Battery Positive Voltage or Abnormally High Battery Positive Voltage
	Front speed sensor circuit	DTC C0200/31, C0205/32, C1235/35, C1236/36, C1271/71, C1272/72, C1275/75, C1276/76: Right Front Wheel Speed Sensor Signal; Left Front Wheel Speed Sensor Signal; Foreign Object is Attached on Tip of Front Speed Sensor RH; Foreign Object is Attached on Tip of Front Speed Sensor LH; Low Output Signal of Front Speed Sensor RH (Test Mode DTC); Low Output Signal of Front Speed Sensor LH (Test Mode DTC); Abnormal Change in Output Signal of Front Speed Sensor RH (Test Mode DTC); Abnormal Change in Output Signal of Front Speed Sensor LH (Test Mode DTC)
	Skid control sensor circuit	DTC C0210/33, C0215/34, C1238/38, C1239/39, C1273/73, C1274/74, C1277/77, C1278/78: Right Rear Wheel Speed Sensor Signal; Left Rear Wheel Speed Sensor Signal; Foreign Object is Attached on Tip of Rear Speed Sensor RH; Foreign Object is Attached on Tip of Rear Speed Sensor LH; Low Output Signal of Rear Speed Sensor RH (Test Mode DTC); Low Output Signal of Rear Speed Sensor LH (Test Mode DTC); Abnormal Change in Output Signal of Rear Speed Sensor RH (Test Mode DTC); Abnormal Change in Output Signal of Rear Speed Sensor LH (Test Mode DTC)
	Check brake actuator using intelligent tester. (Check brake actuator operation using active test function.) If abnormal, check hydraulic circuit for leakage.	ON-VEHICLE INSPECTION
	If symptoms still occur even after above circuits in suspected areas inspected and proved to be normal, replace brake actuator (skid control ECU).	REMOVAL
ABS and/or EBD does not operate efficiently	Check DTC again and make sure that normal system code displayed.	DTC CHECK/CLEAR
	Front speed sensor circuit	DTC C0200/31, C0205/32, C1235/35, C1236/36, C1271/71, C1272/72, C1275/75, C1276/76: Right Front Wheel Speed Sensor Signal; Left Front Wheel Speed Sensor Signal; Foreign Object is Attached on Tip of Front Speed Sensor RH; Foreign Object is Attached on Tip of Front Speed Sensor LH; Low Output Signal of Front Speed Sensor RH (Test Mode DTC); Low Output Signal of Front Speed Sensor LH (Test Mode DTC); Abnormal Change in Output Signal of Front Speed Sensor RH (Test Mode DTC); Abnormal Change in Output Signal of Front Speed Sensor LH (Test Mode DTC)
	Skid control circuit	DTC C0210/33, C0215/34, C1238/38, C1239/39, C1273/73, C1274/74, C1277/77, C1278/78: Right Rear Wheel Speed Sensor Signal; Left Rear Wheel Speed Sensor Signal; Foreign Object is Attached on Tip of Rear Speed Sensor RH; Foreign Object is Attached on Tip of Rear Speed Sensor LH; Low Output Signal of Rear Speed Sensor RH (Test Mode DTC); Low Output Signal of Rear Speed Sensor LH (Test Mode DTC); Abnormal Change in Output Signal of Rear Speed Sensor RH (Test Mode DTC); Abnormal Change in Output Signal of Rear Speed Sensor LH (Test Mode DTC)
	Stop light switch circuit	DTC C1249/49 Open in Stop Light Switch Circuit
	Check brake actuator using intelligent tester. (Check brake actuator operation using active test function.) If abnormal, check hydraulic circuit for leakage.	ON-VEHICLE INSPECTION
	If symptoms still occur even after above circuits in suspected areas inspected and proved to be normal, replace brake actuator (skid control ECU).	REMOVAL
Sensor signal check cannot be done	TS and CG terminal circuit	TS and CG Terminal Circuit
Sensor signal check cannot be done	Brake actuator (skid control ECU)	REMOVAL
DTC check cannot be done	Check DTC again and make sure that normal system code displayed.	DTC CHECK/CLEAR
	TC and CG terminal circuit	TC and CG Terminal Circuit
	If symptoms still occur even after above circuits in suspected areas inspected and proved to be normal, replace brake actuator (skid control ECU).	REMOVAL
ABS warning light remains on	ABS warning light circuit	ABS Warning Light Remains ON
ABS warning light remains on	Brake actuator (skid control ECU)	REMOVAL
ABS warning light does not come on	ABS warning light circuit	ABS Warning Light does not Come ON
ABS warning light does not come on	Brake actuator (skid control ECU)	REMOVAL
BRAKE warning light remains on	BRAKE warning light circuit	Brake Warning Light Remains ON
BRAKE warning light remains on	Brake actuator (skid control ECU)	REMOVAL
BRAKE warning light does not come on	Brake warning light circuit	Brake Warning Light Does Not Come ON
BRAKE warning light does not come on	Brake actuator (skid control ECU)	REMOVAL