Test Mode Procedure

CHECK WARNING LIGHT AND INDICATOR LIGHT

Release the parking brake pedal.
CAUTION: When releasing the parking brake, move the shift lever into the P position to hold the vehicle for safety.

Fig 1: Identifying Warning Light And Indicator Light
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

When the ignition switch is turned ON, check that the ABS warning light, brake warning light, VSC OFF indicator light, and slip indicator light turn off after the engine starts.

HINT:

When the parking brake is applied or the level of the brake fluid is low, the brake warning light illuminates.
If the ECU stores a DTC, the ABS warning light and VSC OFF indicator light illuminate.

When depressing the brake pedal repeatedly, it may turn on the brake warning light and sound the buzzer.

TROUBLE AREA CHART

Trouble Area	See procedure
ABS warning light circuit	ABS WARNING LIGHT CIRCUIT
Brake warning light circuit	BRAKE WARNING LIGHT CIRCUIT
VSC OFF indicator light circuit	VSC OFF Indicator Light Circuit
Slip indicator light circuit	SLIP INDICATOR LIGHT CIRCUIT
Skid control buzzer circuit	SKID CONTROL BUZZER CIRCUIT

CHECK SENSOR SIGNAL BY TEST MODE (When not Using Intelligent Tester)

Procedures for test mode:

Turn the ignition switch OFF.
Using SST, connect terminals 12 (TS) and 4 (CG) of the DLC3.
SST 09843-18040
Check that the steering wheel is in the straight ahead position and move the shift lever to P.
Turn the ignition switch ON.

Check that the ABS warning light or VSC OFF indicator light blinks as shown in the illustration.

Fig 2: Identifying Blinking Pattern

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

If no code appears, check the TC and CG terminal circuit, ABS warning light circuit or VSC OFF indicator light circuit.

TROUBLE AREA CHART

Trouble Area	See procedure
TC and CG terminal circuit	TC AND CG TERMINAL CIRCUIT
ABS warning light circuit	ABS WARNING LIGHT CIRCUIT
VSC OFF indicator light circuit	VSC OFF Indicator Light Circuit

Check the deceleration sensor.
1. Create gravitational force (0.2 G or more) on the vehicle through deceleration. Use one of the following methods to decelerate the vehicle in the direction it is moving:
  - Apply the brakes while the vehicle is moving.
  - Drive over a bump.
  - Drive on an incline.
    
    Fig 3: Identifying DLC3 Connector Terminals
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. When the deceleration is 0.2 G or more, check that the ABS warning light illuminates.
Check the master cylinder pressure sensor.
1. Leave the vehicle in a stationary condition and the brake pedal released for 1 second or more. Then quickly depress the brake pedal with a force of 98 N (10 kgf, 22 lbf) or more for 1 second or more.
  HINT:
  
  At this time, the ABS warning light turns on for 3 seconds.

Check the speed sensor.

Fig 4: Identifying DLC3 Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Drive the vehicle straight forward at the following speeds. Then check the ABS warning light.

ABS WARNING LIGHT CHART

Vehicle Speed	Check	ABS Warning Light
3 to 5 km/h (2 to 3 mph)	Response of sensors	Blinks
45 km/h (28 mph) or higher	Deviations of sensor signal	Turns off

HINT:

The sensor signal check may not complete if the vehicle's wheels slip or the steering wheel is turned during this check. (2) Stop the vehicle.

Read the DTCs.
1. Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.
  SST 09843-18040
2. Read the number of blinks of the ABS warning light.
  HINT:
  - As an example, the blinking patterns for trouble codes 72 and 76 are shown below.
  - The conditions are explained in the Diagnostic Trouble Code chart.
  - For the normal code, the light cycles between ON and OFF at intervals of 0.25 seconds.
  - If more than 1 DTC is detected at the same time, the lowest numbered code will be displayed first.
    
    Fig 5: Identifying Blinking Pattern
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 6: Identifying Blinking Pattern
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. After the check, disconnect SST from terminals 13 (TC) and 4 (CG) of the DLC3.
Check the yaw rate sensor.
1. Move the shift lever to D and drive the vehicle at a speed of approximately 5 km/h (3 mph). Turn the steering wheel either to the left or right 90° or more, and drive the vehicle in a half-circle pattern.
2. Stop the vehicle and move the shift lever to P. Check that the VSC buzzer sounds for 3 seconds.
  If the VSC buzzer sounds, the sensor check has completed normally.
  
  If the VSC buzzer does not sound, check the VSC buzzer circuit and check the sensor again. If the VSC buzzer still does not sound, there is a malfunction in the VSC sensor. Check the DTCs.
  
  HINT:
  - Drive the vehicle in a half-circle pattern. At the end of the turn, the direction of the vehicle should be within 175° to 185° from its start position.
  - Do not spin the wheels.
    
    Fig 7: Identifying Vehicle Start And End Position
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Read the DTCs.
1. Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.
  SST 09843-18040
2. Read the number of blinks of the VSC OFF indicator light.
  HINT:
  - As an example, the blinking patterns for trouble codes 71 and 72 are shown below.
  - The conditions are explained in the Diagnostic Trouble Code chart.
  - For the normal code, the light cycles between ON and OFF at intervals of 0.25 seconds.
    
    Fig 8: Identifying DLC3 Connector Terminals
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  - If more than 1 DTC is detected at the same time, the lowest numbered code will be displayed first.
    
    Fig 9: Identifying Blinking Pattern
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. After the check, disconnect SST from terminals 13 (TC) and 4 (CG) of the DLC3.

CHECK SENSOR SIGNAL BY TEST MODE (When Using Intelligent Tester)

Procedures for test mode:

Turn the ignition switch OFF.
Check that the shift lever is on P.
Connect the intelligent tester (with CAN VIM) to the DLC3.
Start the engine.
Select the Test Mode using the intelligent tester.
HINT:

Refer to the intelligent tester operator's manual for further details.

Fig 10: Connecting Intelligent Tester To DLC3
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Check that the ABS warning light and VSC OFF indicator light blink.

HINT:

If the ABS warning light and VSC OFF indicator light do not blink, check the ABS warning light circuit and VSC OFF indicator light circuit.

TROUBLE AREA CHART

Trouble Area	See procedure
ABS warning light circuit	ABS WARNING LIGHT CIRCUIT
VSC OFF indicator light circuit	VSC OFF Indicator Light Circuit

Fig 11: Identifying Blinking Pattern

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Start the engine.

Check the deceleration sensor.
1. Create gravitational force (0.2 G or more) on the vehicle through deceleration. Use one of the following methods to decelerate the vehicle in the direction it is moving:
  - Apply the brakes while the vehicle is moving.
  - Drive over a bump.
  - Drive on an incline.
2. When the deceleration is 0.2 G or more, check that the ABS warning light illuminates.
Check the master cylinder pressure sensor.
1. Leave the vehicle in a stationary condition and the brake pedal released for 1 second or more. Then quickly depress the brake pedal with a force of 98 N (10 kgf, 22 lbf) or more for 1 second or more.
  HINT:
  
  At this time, the ABS warning light turns on for 3 seconds.

Check the speed sensor.

Drive the vehicle straight forward at the following speed. Then check the ABS warning light.

VEHICLE SPEED CHART

Vehicle Speed	Check	ABS Warning Light
3 to 5 km/h (2 to 3 mph)	Response of sensors	Blinks
45 km/h (28 mph) or higher	Deviations of sensor signal	Turns off

HINT:

The sensor signal check may not complete if the vehicle's wheels slip or the steering wheel is turned during this check.

Stop the vehicle.
Read the DTCs.

Check the yaw rate sensor.

Move the shift lever to D and drive the vehicle at a speed of approximately 5 km/h (3 mph). Turn the steering wheel either to the left or right 90° or more, and drive the vehicle in a half-circle pattern.
Stop the vehicle and move the shift lever to P. Check that the VSC buzzer sounds for 3 seconds.
If the VSC buzzer sounds, the sensor check has completed normally.

If the VSC buzzer does not sound, check the VSC buzzer circuit, and check the sensor again. If the skid control buzzer still does not sound, there is a malfunction in the VSC sensor. Check the DTCs.

HINT:
- Drive the vehicle in a half-circle pattern. At the end of the turn, the direction of the vehicle should be within 175° to 185° from its start position.
- Do not spin the wheels.

Read the DTCs.

DTC of ABS sensor check function:

TROUBLE AREA CHART

Code No.	Diagnosis	Trouble Area
C1271/71	Low output voltage in front speed sensor RH	Front speed sensor RH Sensor installation Sensor rotor
C1272/72	Low output voltage in front speed sensor LH	Front speed sensor LH Sensor installation Sensor rotor
C1273/73	Low output voltage in rear speed sensor RH	Rear speed sensor RH Sensor installation Sensor rotor
C1274/74	Low output voltage in rear speed sensor LH	Rear speed sensor LH Sensor installation Sensor rotor
C1275/75	Abnormal change in output voltage of front speed sensor RH	Front speed sensor rotor RH
C1276/76	Abnormal change in output voltage of front speed sensor LH	Front speed sensor rotor LH
C1277/77	Abnormal change in output voltage of rear speed sensor RH	Rear speed sensor rotor RH
C1278/78	Abnormal change in output voltage of rear speed sensor LH	Rear speed sensor rotor LH
C1279/79	Deceleration sensor is faulty	Deceleration sensor Sensor installation
C1281/81	Master cylinder pressure sensor output signal is faulty	Master cylinder pressure sensor

DTC of VSC sensor check function:

TROUBLE AREA CHART

Code No.	Diagnosis	Trouble Area
C0371/71	Yaw rate sensor output signal malfunction	Yaw rate sensor Yaw rate sensor circuit