Problem Symptoms Table

WARNING: This page is about a different car, the 2008 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

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.

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

Vehicle Stability Control System

VEHICLE STABILITY CONTROL SYSTEM

Symptom	Suspected Area	Reference
ABS, BA and/or EBD does not operate	Check for DTCs 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 RIGHT FRONT WHEEL SPEED SENSOR SIGNAL; DTC C0205/32 LEFT FRONT WHEEL SPEED SENSOR SIGNAL; 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 OPEN CIRCUIT IN RIGHT FRONT WHEEL SPEED SENSOR CIRCUIT; DTC C1331/36 OPEN CIRCUIT IN LEFT FRONT WHEEL SPEED SENSOR CIRCUIT
	Rear speed sensor circuit	DTC C0210/33 RIGHT REAR WHEEL SPEED SENSOR SIGNAL; DTC C0215/34 LEFT REAR WHEEL SPEED SENSOR SIGNAL; 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 C1332/37 OPEN CIRCUIT IN RIGHT REAR WHEEL SPEED SENSOR CIRCUIT; DTC C1333/38 OPEN CIRCUIT IN LEFT REAR WHEEL SPEED SENSOR CIRCUIT
	Master cylinder pressure sensor (Check master cylinder pressure sensor by performing test mode inspection)	TEST MODE PROCEDURE
	Check VSC actuator using Techstream (Check VSC actuator operation using Active Test function). If abnormal, check hydraulic circuit for leakage.	BRAKE ACTUATOR
	If symptoms still occur even after above circuits in suspected areas inspected and proved to be normal, replace VSC actuator (skid control ECU)	BRAKE ACTUATOR
ABS, BA and/or EBD does not operate efficiently	Check for DTCs again and make sure that normal system code displayed	DTC CHECK/CLEAR
	Front speed sensor circuit	DTC C0200/31 RIGHT FRONT WHEEL SPEED SENSOR SIGNAL; DTC C0205/32 LEFT FRONT WHEEL SPEED SENSOR SIGNAL; 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 OPEN CIRCUIT IN RIGHT FRONT WHEEL SPEED SENSOR CIRCUIT; DTC C1331/36 OPEN CIRCUIT IN LEFT FRONT WHEEL SPEED SENSOR CIRCUIT
	Rear speed sensor circuit	DTC C0210/33 RIGHT REAR WHEEL SPEED SENSOR SIGNAL; DTC C0215/34 LEFT REAR WHEEL SPEED SENSOR SIGNAL; 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 C1332/37 OPEN CIRCUIT IN RIGHT REAR WHEEL SPEED SENSOR CIRCUIT; DTC C1333/38 OPEN CIRCUIT IN LEFT REAR WHEEL SPEED SENSOR CIRCUIT
	Stop light switch circuit	DTC C1249/49 OPEN IN STOP LIGHT SWITCH CIRCUIT
	Master cylinder pressure sensor (Check master cylinder pressure sensor by performing test mode inspection)	TEST MODE PROCEDURE
	Check VSC actuator using Techstream (Check VSC actuator operation using Active Test function). If abnormal, check hydraulic circuit for leakage.	BRAKE ACTUATOR
	If symptoms still occur even after above circuits in suspected areas inspected and proved to be normal, replace VSC actuator (skid control ECU)	BRAKE ACTUATOR
VSC and/or TRAC does not operate	Check for DTCs 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
	Fluid leaks in brake system	-
	Front speed sensor circuit	DTC C0200/31 RIGHT FRONT WHEEL SPEED SENSOR SIGNAL; DTC C0205/32 LEFT FRONT WHEEL SPEED SENSOR SIGNAL; 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 OPEN CIRCUIT IN RIGHT FRONT WHEEL SPEED SENSOR CIRCUIT; DTC C1331/36 OPEN CIRCUIT IN LEFT FRONT WHEEL SPEED SENSOR CIRCUIT
	Rear speed sensor circuit	DTC C0210/33 RIGHT REAR WHEEL SPEED SENSOR SIGNAL; DTC C0215/34 LEFT REAR WHEEL SPEED SENSOR SIGNAL; 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 C1332/37 OPEN CIRCUIT IN RIGHT REAR WHEEL SPEED SENSOR CIRCUIT; DTC C1333/38 OPEN CIRCUIT IN LEFT REAR WHEEL SPEED SENSOR CIRCUIT
	Yaw rate and deceleration sensor circuit	DTC C0371/71 YAW RATE SENSOR (TEST MODE DTC); DTC C1232/32 STUCK IN DECELERATION SENSOR; DTC C1234/34 YAW RATE SENSOR MALFUNCTION; DTC C1244/44 OPEN OR SHORT IN DECELERATION SENSOR CIRCUIT; DTC C1279/79 DECELERATION SENSOR OUTPUT VOLTAGE MALFUNCTION (TEST MODE DTC)
	Steering angle sensor circuit	DTC C1231/31 STEERING ANGLE SENSOR CIRCUIT MALFUNCTION
	If symptoms still occur even after above circuits in suspected areas inspected and proved to be normal, replace VSC actuator (skid control ECU)	BRAKE ACTUATOR
Sensor signal check cannot be performed	TS and CG terminal circuit	TS AND CG TERMINAL CIRCUIT
Sensor signal check cannot be performed	VSC actuator (skid control ECU)	BRAKE ACTUATOR
DTC check cannot be performed	Check for DTCs 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 VSC actuator (skid control ECU)	BRAKE ACTUATOR
ABS warning light abnormal (Remains on)	ABS warning light circuit	ABS WARNING LIGHT REMAINS ON
ABS warning light abnormal (Remains on)	VSC actuator (skid control ECU)	BRAKE ACTUATOR
ABS warning light abnormal (Does not come on)	ABS warning light circuit	ABS WARNING LIGHT DOES NOT COME ON
ABS warning light abnormal (Does not come on)	VSC actuator (skid control ECU)	BRAKE ACTUATOR
BRAKE warning light abnormal (Remains on)	BRAKE warning light circuit	BRAKE WARNING LIGHT REMAINS ON
BRAKE warning light abnormal (Remains on)	VSC actuator (skid control ECU)	BRAKE ACTUATOR
BRAKE warning light abnormal (Does not come on)	BRAKE warning light circuit	BRAKE WARNING LIGHT DOES NOT COME ON
BRAKE warning light abnormal (Does not come on)	VSC actuator (skid control ECU)	BRAKE ACTUATOR
SLIP indicator light abnormal (Remains on)	SLIP indicator light circuit	SLIP INDICATOR LIGHT REMAINS ON
SLIP indicator light abnormal (Remains on)	VSC actuator (skid control ECU)	BRAKE ACTUATOR
SLIP indicator light abnormal (Does not come on)	SLIP indicator light circuit	SLIP INDICATOR LIGHT DOES NOT COME ON
SLIP indicator light abnormal (Does not come on)	VSC actuator (skid control ECU)	BRAKE ACTUATOR
VSC OFF indicator light abnormal (Remains on)	VSC OFF indicator light circuit	VSC OFF INDICATOR LIGHT REMAINS ON
VSC OFF indicator light abnormal (Remains on)	VSC actuator (skid control ECU)	BRAKE ACTUATOR
VSC OFF indicator light abnormal (Does not come on)	VSC OFF indicator light circuit	VSC OFF INDICATOR LIGHT DOES NOT COME ON
VSC OFF indicator light abnormal (Does not come on)	VSC actuator (skid control ECU)	BRAKE ACTUATOR
AUTO LSD indicator light abnormal (Remains on)	AUTO LSD indicator light circuit	AUTO LSD INDICATOR LIGHT REMAINS ON
AUTO LSD indicator light abnormal (Remains on)	VSC actuator (skid control ECU)	BRAKE ACTUATOR
AUTO LSD indicator light abnormal (Does not come on)	AUTO LSD indicator light circuit	AUTO LSD INDICATOR LIGHT DOES NOT COME ON
AUTO LSD indicator light abnormal (Does not come on)	VSC actuator (skid control ECU)	BRAKE ACTUATOR
Skid control buzzer abnormal	Skid control buzzer circuit	SKID CONTROL BUZZER CIRCUIT
Skid control buzzer abnormal	VSC actuator (skid control ECU)	BRAKE ACTUATOR