Abs With EBD & BA & TRAC & VSC System: Pre-Check

WARNING: This page is about a different car, the 2005 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSIS SYSTEM

Check the warning lights.
1. Release the parking brake pedal.
2. When the ignition switch is turned ON, check that the ABS warning light, VSC warning light, TRAC OFF indicator light, BRAKE warning light and SLIP indicator light come on for approx. 3 seconds.

HINT:

When the parking brake is applied or the level of the brake fluid is low, the BRAKE warning light comes on.
If the indicator check result is not normal, proceed to troubleshooting for the ABS warning light circuit, TRAC warning light circuit, TRAC OFF indicator light circuit, BRAKE warning light circuit or SLIP indicator light circuit.

DIAGNOSIS TABLE

Trouble Area
ABS WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP)
BRAKE WARNING LIGHT CIRCUIT
VSC WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP)
TRAC OFF INDICATOR LIGHT, TRAC OFF SWITCH CIRCUIT
SLIP INDICATOR LIGHT CIRCUIT

Fig 1: Identifying Brake Warning Light Indicator

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

DTC CHECK (USING SST CHECK WIRE)

Checking DTCs using a SST check wire. SST 09843-18040

Using SST, connect terminals TC and CG of DLC3.
Turn the ignition switch ON.

Read the DTC from the ABS warning light and VSC warning light on the combination meter.

HINT:

If no code appears, inspect the diagnostic circuit, ABS warning light circuit or VSC warning light circuit.

Fig 2: Identifying Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

DIAGNOSIS TABLE

Trouble Area
TC TERMINAL CIRCUIT
ABS WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP)
VSC WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP)

As an example, the blinking patterns for normal code and codes 11 and 21 are shown on Fig 3.

Codes are explained in the code table on DIAGNOSTIC TROUBLE CODE TABLE .
After completing the check, disconnect terminals TC and CG of DLC3, and turn off the display.

If 2 or more are DTCs are detected at the same time, the DTCs will be displayed in ascending order.

Fig 3: Identifying Blinking Patterns Of Normal Code & Codes 11 & 21

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Clearing the DTCs using the SST check wire.
SST 09843-18040
1. Using SST, connect terminals TC and CG of DLC3.
2. Turn the ignition switch ON.
3. Clear the DTCs stored in ECU by depressing the brake pedal 8 times or more within 5 seconds.
4. Check that the warning light indicates the normal code.
5. Remove the SST from the terminals of DLC3.
Fig 4: Depressing Brake Pedal
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

Clearing the DTCs cannot be performed by removing the battery cable or ECU-IG fuse.

DTC CHECK (USING HAND-HELD TESTER)
1. Checking DTCs using the Hand-held tester.
  1. Connect the hand-held tester to the DLC3,
  2. Turn the ignition switch ON.
  3. Read the DTC by following the prompts on the tester screen.
  HINT:
  
  Refer to the hand-held tester operator's manual for further details.
2. Clearing the DTCs using the hand-held tester.
  1. Connect the hand-held tester to the DLC3.
  2. Turn the ignition switch ON.
  3. Operate the hand-held tester to erase the codes.
  HINT:
  
  Refer to the hand-held tester operator's manual for further details.

DATA LIST

With the hand-held tester connected to DLC3 and the ignition turned to ON, the ABS, TRAC and VSC data list can be displayed. Follow the prompts on the tester screen to access the Data List.

DATA LIST

Item

Measurement Item / Range (Display)

Normal Condition

Diagnostic Note

ABS MOT RELAY

ABS motor relay / ON or OFF

ON : Motor relay ON

SOL RELAY

Solenoid relay / ON or OFF

ON : Solenoid relay ON

VSC / TRAC OFF SW⁽¹⁾

VSC / TRAC OFF switch / ON or OFF

ON : TRAC OFF switch ON

IDLE SW

Main idle switch / ON or OFF

ON : Accelerator pedal released OFF: Accelerator pedal depressed

STOP LIGHT SW

Stop light switch / ON or OFF

OFF : Brake pedal depressed ON : Brake pedal released

PKB SW

Parking brake switch / ON or OFF

ON : Parking brake applied OFF : Parking brake released

ABS OPERT FR

ABS operation (FR) / BEFORE or OPERATE

BEFORE : No ABS operation (FR) OPERATE : During ABS operation (FR)

ABS OPERT FL

ABS operation (FL) / BEFORE or OPERATE

BEFORE : No ABS operation (FL) OPERATE: During ABS operation (FL)

ABS OPERT RR

ABS operation (RR) / BEFORE or OPERATE

BEFORE : No ABS operation (RR) OPERATE : During ABS operation (RR)

ABS OPERT RL

ABS operation (RL) / BEFORE or OPERATE

BEFORE : No ABS operation (RL) OPERATE : During ABS operation (RL)

WHEEL SPDFR

Wheel speed sensor (FR) reading / min.: 0 km/h (0 MPH, max.: 326 km/h (202 MPH)

Actual wheel speed

Speed indicated on speedometer

WHEEL SPD FL

Wheel speed sensor (FL) reading / min.: 0 km/h (0 MPH, max.: 326 km/h (202 MPH)

Actual wheel speed

Speed indicated on speedometer

WHEEL SPD RR

Wheel speed sensor (RR) reading / min.: 0 km/h (0 MPH, max.: 326 km/h (202 MPH)

Actual wheel speed

Speed indicated on speedometer

WHEEL SPD RL

Wheel speed sensor (RL) reading / min.: 0 km/h (0 MPH, max.: 326 km/h (202 MPH)

Actual wheel speed

Speed indicated on speedometer

DECELERATE SENS

Deceleration sensor 1 reading/min.: -1.869G, max.: 1.869 G

Approximately 0 +/- 0.13G at still condition

Reading changes when vehicle is bounced

DECELERATE SENS2

Deceleration sensor 2 reading/min.: -1.869 G, max.: 1.869 G

Approximately 0 +/- 0.13G at still condition

Reading changes when vehicle is bounced

IG VOLTAGE

ECU power supply voltage / NORMAL or TOO LOW

NORMAL : 9.5 V or over TOO LOW : Below 9.5 V

SFRR

ABS solenoid (SFRR) / ON or OFF

ON : Operate

SFRH

ABS solenoid (SFRH) / ON or OFF

ON : Operate

SFLR

ABS solenoid (SFLR) / ON or OFF

ON : Operate

SFLH

ABS solenoid (SFLH) / ON or OFF

ON : Operate

SRRR (SRR)

ABS solenoid (SRRR (SRR)) / ON or OFF

ON : Operate

SRRH (SRH)

ABS solenoid (SRRH (SRH)) / ON or OFF

ON : Operate

SRLR

ABS solenoid (SRLR) / ON or OFF

ON : Operate

SRLH

ABS solenoid (SRLH) / ON or OFF

ON : Operate

SMF (BA-SOL)

TRAC solenoid (SMF) / ON or OFF

ON : Operate

SMR

TRAC solenoid (SMR) / ON or OFF

ON : Operate

THROTTLE

Throttle position sensor/ Min.: 0 deg, Max.: 125 deg

Release accelerator pedal: Approx. 0 deg. Depress accelerator pedal: Approx. 90 deg.

ENGINE SPD

Engine Speed/ Min.: 0 RPM, Max.: 6000 RPM

Actual engine speed

VEHICLE SPD

Maximum wheel speed sensor reading / min.: 0 km/h (0 MPH), max.: 326 km/h (202 MPH)

Actual vehicle speed

Speed indicated on speedometer

YAW RATE

Yaw rate sensor/ Min.: -128 deg/s, Max.: 128 deg/s

Min.: -128 deg/s Max.: 128 deg/s

YAW ZERO VALUE

Memorized zero value/ Min.: -128 deg/s, Max.: 128 deg/s

Min.: -128 deg/s Max.: 128 deg/s

STEERING ANG

Steering sensor/ Min,: -1152 deg, Max.: 1150.875 deg

Left turn: Increase Right turn: Decrease

MAS CYL PRESS 1

Master cylinder pressure sensor 1 reading / min.: 0 V, max.: 5 V

When brake pedal is released : 0.3 to 0.9 V

Reading increases when brake pedal is depressed

AIR BLD SUPPORT

Air bleed support/ NOT SUP or SUPPORT

Not supported

SPD SEN FR

FR speed sensor open detection/ OPN DET/NORMAL

NORMAL

SPD SEN FL

FL speed sensor open detection/ OPN DET/NORMAL

NORMAL

SPD SEN RR

RR speed sensor open detection/ OPN DET/NORMAL

NORMAL

SPD SEN RL

RL speed sensor open detection/ OPN DET/NORMAL

NORMAL

EFI COM

EFI communication open detection/ OPN DET/NORMAL

NORMAL

YAWRATE SEN

Yaw rate sensor open detection/ OPN DET/NORMAL

NORMAL

DECELE SEN

Deceleration sensor open detection/ OPN DET/NORMAL

NORMAL

STEERING SEN

Steering sensor open detection/ OPN DET/NORMAL

NORMAL

TEST MODE

Test mode / NORMAL or TEST

NORMAL: Normal mode TEST : During test mode

#CODES

Number of DTC recorded / min.: 0, max.: 255

Min.: 0, max.: 39

⁽¹⁾

2WD only

ACTIVE TEST

HINT:

Performing the ACTIVE TEST using the hand-held tester allows the relay, VSV, actuator and so on to operate without removing any parts. Performing the ACTIVE TEST as a first step of troubleshooting is one of the methods to reduce troubleshooting time.

It is possible to display the DATA LIST during the ACTIVE TEST.

Connect the hand-held tester to the DLC3.
Turn the ignition switch ON.
From to the display on the tester, select the "ACTIVE TEST".

HINT:

IG must be turned ON to proceed ACTIVE TEST using a hand-held tester.

DATA LIST ACTIVE TEST TABLE

Item	Vehicle Condition / Test Details	Diagnostic Note
SFRR	Turns ABS solenoid (SFRR) ON / OFF	Operation of solenoid (clicking sound) can be heard
SFRH	Turns ABS solenoid (SFRH) ON / OFF	Operation of solenoid (clicking sound) can be heard
SFLR	Turns ABS solenoid (SFLR) ON / OFF	Operation of solenoid (clicking sound) can be heard
SFLH	Turns ABS solenoid (SFLH) ON / OFF	Operation of solenoid (clicking sound) can be heard
SRRR	Turns ABS solenoid (SRRR) ON / OFF	Operation of solenoid (clicking sound) can be heard
SRRH	Turns ABS solenoid (SRRH) ON / OFF	Operation of solenoid (clicking sound) can be heard
SRLR	Turns ABS solenoid (SRLR) ON / OFF	Operation of solenoid (clicking sound) can be heard
SRLH	Turns ABS solenoid (SRLH) ON / OFF	Operation of solenoid (clicking sound) can be heard
SMF (BA-SOL)	Turns TRAC solenoid SMF (BA-SOL) ON / OFF	Operation of solenoid (clicking sound) can be heard
SMR	Turns TRAC solenoid SMR ON / OFF	Operation of solenoid (clicking sound) can be heard
SOL RELAY	Turns ABS solenoid relay ON / OFF	Operation of solenoid (clicking sound) can be heard
ABS MOT RELAY	Turns ABS motor relay ON / OFF	Operation of motor can be heard
ABS WARN LIGHT	Turns ABS warning light ON / OFF	Observe combination meter
VSC WARN LIGHT	Turns VSC warning light ON / OFF	Observe combination meter
VSC/TRC OFF IND	Turns VSC / TRAC OFF indicator ON / OFF	Observe combination meter
SLIP INDI LIGHT	Turns SLIP indicator light ON / OFF	Observe combination meter
BRAKE WRN LIGHT	Turns BRAKE warning light ON / OFF	Observe combination meter
VSC / BR WARN BUZ	Turns VSC / BRAKE warning buzzer ON / OFF	Buzzer can be heard

FREEZE FRAME DATA

The vehicle (sensor) status stored during ABS and/or VSC operation or at the time of error code detection can be displayed by the hand-held tester.
Only one record of the freeze frame data is stored and the freeze frame data generated during ABS and/or VSC operation are updated whenever the vehicle status is changed. Also, the number of the operation of the ignition switch "ON" after the freeze frame data is stored can be stored up to 31 and it can be displayed.
HINT:

If the ignition switch "ON" operation exceeds 31 times, "31" appears on the display.
If the diagnosis code malfunction occurs, the freeze frame data at the occurrence of the malfunction is stored but the ABS actuation data is deleted.

FREEZE FRAME DATA LIST TABLE

Hand-held tester display

Measurement Item

Reference Value⁽¹⁾

VEHICLE SPD

Wheel speed sensor reading

Speed indicated on speedometer

STOP LIGHT SW

Stop light switch signal

Stop light switch ON: ON, OFF: OFF

#IG ON

Number of operations of ignition switch ON after memorizing freeze frame data

0 to 31

MAS CYL PRESS

Master cylinder pressure sensor reading

Brake pedal release: 0.3 to 0.9 V
Brake pedal depress: 0.8 to 4.5 V

MASS PRESS GRADE

Master cylinder pressure sensor change

-30 - 200 MPa/s

SYSTEM

System status

ABS activated: ABS
VSC/TRAC activated: VSC/TRAC
BA activated: BA
Fail safe mode activated: FAIL SF
No system activated: NO SYS

YAW RATE

Yaw rate angle sensor reading

-100 to 100

STEERING ANG

Steering sensor reading

Left turn: Increase
Right turn: Decrease

THROTTLE

Throttle position sensor reading

Release accelerator pedal: Approx. 0 deg.
Depress accelerator pedal: Approx. 90 deg.

G (RIGHT & LEFT)

Right and left G

-1.869 to 1.869

G (BACK & FORTH)

Back and forth G

-1.869 to 1.869

VSC (TRAC) OFF SW⁽²⁾

VSC OFF switch signal

TRAC OFF SW ON: ON
OFF: OFF

SHIFT POSITION

Shift lever position

FAIL
P,N
R
D
4
3
2
L

⁽¹⁾	If no conditions are specifically stated for "Idling", it means the shift lever is at N or P position, the A/C switch is OFF and all accessory switches are OFF.

⁽²⁾

2WD only

SENSOR SIGNAL CHECK (TEST MODE) (USING SST CHECK WIRE)

NOTE: After replacing the yaw rate sensor and/or brake actuator assembly (skid control ECU), perform zero point calibration of the yaw rate sensor (See step 9).

HINT:

If the ignition switch is turned from ON to ACC or LOCK during test mode, the DTCs will be erased.

Procedures for the test mode:

Turn the ignition switch OFF.
Using SST, it connects terminal TS and CG of DLC3. SST 09843-18040
Check that the steering wheel is in the straight ahead position and shift the shift lever to P range.
Turn the ignition switch to ON.

Fig 5: Identifying Connector Terminal Of TS & CG
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Check that the ABS warning light and VSC warning light blink.

HINT:

If the ABS warning light does not blink, inspect the ABS warning light circuit or TS terminal circuit.

DIAGNOSIS TABLE

Trouble area
TS TERMINAL CIRCUIT
ABS WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP)
VSC WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP)

Fig 6: Identifying ABS Warning Light & VSC Warning Light Blink Pattern

Check the master cylinder pressure sensor.
1. Leaving the vehicle in a stationary condition and the brake pedal in free condition for 1 sec. or more, continue to quickly depress the brake pedal with a force of 98 N (10 kgf, 22 lbf) or more for 1 sec. or more.
HINT:

At this time, the ABS warning light goes on for 3 sec
Check the Speed sensor signal
1. Drive the vehicle straight forward at the speed of 45 km/h (28 mph) or over for several seconds and check that the ABS warning light comes off.
  HINT:
  
  The sensor check may not be completed if the wheels spin or the steering wheels are steered during this check.
2. Stop the vehicle.
3. Using SST, it connects terminal TC and CG of DLC3. SST 09843-18040
4. Read the number of blinks of the ABS warning light.
  HINT:
  - See the list of DTC on DIAGNOSTIC TROUBLE CODE TABLE .
  - If every sensors are normal, the normal code is output (A cycle of 0.25 sec. ON and 0.25 sec. OFF is repeated).
  - If more than 1 malfunctions are detected at the same time, the lowest numbered code will be displayed first.
  Fig 7: Identifying Connector Terminal Of TS & CG
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 8: Identifying Blinking Patterns Of Normal Code
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. After the check, disconnect the SST from terminal TC and CG of the DLC3.
Check the yaw rate sensor.
1. Shift the shift lever to the D range and drive the vehicle at the vehicle speed of approx. 5 km/h (3 mph), turn the steering wheel either to left or right 90° or more, and maintain 180° circular drive for the vehicle.
2. Stop the vehicle and shift the shift lever to the P position, check that the skid control buzzer sounds for 3 sec.
  
  Fig 9: Checking Yaw Rate Sensor
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  HINT:
  - If the skid control buzzer sounds, the sensor check is completed normally.
  - If the skid control buzzer does not sound, check the skid control buzzer circuit (See SKID CONTROL BUZZER CIRCUIT ), then perform the sensor check again.
  - If the skid control buzzer still won't sound, there is a malfunction in the VSC sensor, so check the DTC.
  - Drive the vehicle in a 180° circle. At the end of the turn, the direction of the vehicle should be within 180° +/-5° of its start position.
  - Do not spin the wheels.
3. Using SST, connect terminals TC and CG of DLC3. SST 09843-18040
4. Read the number of blinks of the VSC warning light.
  HINT:
  - See the list of DTC (See DIAGNOSTIC TROUBLE CODE TABLE ).
  - If every sensor is normal, there is a normal code output. (A cycle of 0.25 sec. ON and 0.25 sec. OFF is repeated.)
  - If 2 or more malfunctions are indicated at the same time, the lowest numbered code will be displayed 1st.
  Fig 10: Identifying Blinking Patterns Of Malfunction Code
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. After performing the check, disconnect the SST from terminals TS and CG, TC and CG of DLC3 and turn the ignition switch OFF.

SENSOR SIGNAL CHECK (TEST MODE) (USING HAND-HELD TESTER)
NOTE: After replacing the yaw rate sensor and/or brake actuator assembly (skid control ECU), perform zero point calibration of the yaw rate sensor (See step 10.).

HINT:

If the ignition switch is turned from ON to ACC or LOCK during test mode, DTC will be erased.
1. Procedures for test mode:
  1. Turn the ignition switch OFF.
  2. Check that the shift lever position is at P position.
  3. Connect the hand-held tester to the DLC3.
  4. Operate the hand-held tester to test mode.
  5. Check that the ABS warning light and VSC warning light blink.
  HINT:
  
  If the ABS warning light and VSC warning light do not blink, inspect the ABS warning light circuit and VSC warning light circuit (See ABS WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP) and VSC WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP) ).
2. Check the master cylinder pressure sensor.
  1. Keep the vehicle in the stationary condition on the level place for 1 sec. or more.
  2. Keeping the vehicle in the stationary condition and the brake pedal in free condition for 1 sec. or more. Depress the brake pedal with 98 N (10 kgf, 22 lbf) or more for 0.1 sec. and keep depressing the brake pedal with the same force for 1 sec.
  Fig 11: Blinking Pattern
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  HINT:
  
  At this time, ABS warning light comes on for 3 seconds.
3. Check the speed sensor.
  1. Drive vehicle straight forward.
    When driving the vehicle at the speed of 45 km/h (28 mph) or higher for several seconds, check that the ABS warning light goes off.
    
    HINT:
    
    The sensor check may not be completed if the vehicle has its wheel spin or its steering wheel steered during this check.
  2. Stop the vehicle.
4. Check the yaw rate.
  Shift the shift lever to the D position and drive the vehicle at the vehicle speed of approx. 5 km/h (3 mph), turn the steering wheel either to left or right for 90° or more, and maintain 180° circular drive for the vehicle.
  
  Stop the vehicle and shift the shift lever to the P position, check that the VSC buzzer sounds for 3 sec.
  
  HINT:
  - If the VSC buzzer sounds, the sensor check is in normal completion.
    
    Fig 12: Checking Yaw Rate
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  - If the VSC buzzer does not sound, check the VSC buzzer circuit (See SKID CONTROL BUZZER CIRCUIT ), then perform the sensor check again.
  - Drive the vehicle circularly by 180°. At the end of the turn, the direction of the vehicle should be within 180° +/- 5° of its start position.
  - Do not spin the wheels.
5. Read the DTC by following the tester screen.
HINT:

Please refer to the hand-held tester operator's manual for further details.
IF NECESSARY, PERFORM ZERO POINT CALIBRATION OF YAW RATE SENSOR AND DECELERATION SENSOR (USING SST CHECK WIRE)
HINT:

After replacing the yaw rate sensor and/or the brake actuator assembly, make sure to perform yaw rate sensor and deceleration sensor zero point calibration.
NOTE:
- While obtaining the zero point, do not give any vibration to the vehicle by tilting, moving or shaking it and keep it in a stationary condition. (Do not start the engine.)
- Be sure to perform this on a level surface (within an inclination of 1%).
1. Shift the shift lever to P position.
2. Clearing the zero point calibration using the SST check wire.
  SST 09843-18040
  1. Turn the ignition switch ON.
  2. Using SST, connect and disconnect terminals TS and CG of DLC3 4 times or more within 8 seconds.
  3. Check that the warning light indicates the normal code.
  4. Remove the SST from the terminals of DLC3.
3. Procedures for test mode:
  1. Turn the ignition switch to OFF.
  2. Using SST, it connects terminal TS and CG of DLC3.
    SST 09843-18040
    
    Fig 13: Identifying Connector Terminal Of TS & CG
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Check that the steering wheel is in the straight ahead position and shift the shift lever to P range.
  4. Turn the ignition switch to ON.
4. Keep the vehicle in the stationary condition on the level surface for 2 sec. or more.
5. Check that the VSC warning light blink.
HINT:

If the VSC warning light does not blink, perform the zero point calibration again.
IF NECESSARY, PERFORM ZERO POINT CALIBRATION OF YAW RATE SENSOR AND DECELERATION SENSOR (USING HAND-HELD TESTER)
HINT:

When having replaced the yaw rate sensor and/or the brake actuator assembly, make sure to perform yaw rate sensor and deceleration sensor zero point calibration.
NOTE:
- While obtaining the zero point, do not give any vibration to the vehicle by tilting, moving or shaking it and keep it in a stationary condition. (Do not start the engine.)
- Be sure to do this on a level surface (within an inclination of 1%).
1. Shift the shift lever to P position.
2. Hook up the hand-held tester to the DLC3.
3. Operate the hand-held tester to clear zero point calibration.
4. Operate the hand-held tester to test mode.
5. Turn the ignition switch ON.
6. Keep the vehicle in the stationary condition on the level surface for 2 sec. or more.
7. Check that the VSC warning light blink.
  HINT:
  
  If the VSC warning light does not blink, perform the zero point calibration again.
8. Turn the ignition switch OFF.