Abs With EBD System - Diagnostics: Pre-Check

DIAGNOSIS SYSTEM
1. Release the parking brake lever.
2. Check the warning lights.
  When the ignition switch is turned ON, check that the ABS warning light and brake warning light goes on for 3 sec.
  
  Fig 1: Locating ABS And Brake Warning Light
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  HINT:
  - When the parking brake is applied or the level of the brake fluid is low, the brake warning light is lit.
  - If the indicator check result is not normal, proceed to troubleshooting for the ABS warning light circuit (See DTC ALWAYS ON MALFUNCTION IN ABS ECU or ABS WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP) ) or brake warning light circuit (See BRAKE WARNING LIGHT CIRCUIT ).
    
    Fig 2: Identifying Tc And CG Terminals
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. In case of not using hand-held tester:
  Check the DTC.
  1. Using SST, connect terminals Tc and CG of DLC3.
    SST 09843-18040
  2. Turn the ignition switch to ON.
  3. Read the DTC from the ABS warning light on the combination meter.
    HINT:
    - If not code appears, inspect the diagnostic circuit or ABS warning light circuit (See DTC ALWAYS ON MALFUNCTION IN ABS ECU or ABS WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP) ).
      
      Fig 3: Blinking Pattern Of Normal Code And Codes 11 And 21
      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    - As an example, the blinking patterns for normal code and codes 11 and 21 are shown.
  4. Codes are explained in the code table on DIAGNOSTIC TROUBLE CODE CHART .
    If 2 or more malfunctions are indicated at the same time, the lowest numbered DTC will be displayed 1st.
  5. After completing the check, remove the SST from the DLC3.
    SST 09843-18040
4. In case of using hand-held tester:
  Check the DTC.
  1. Read the DTC by following the prompts on the tester screen.
  HINT:
  
  Please refer to the hand-held tester operator's manual for further details.
5. In case of not using hand-held tester:
  Clear DTC.
  1. Using SST, it connects the terminal Tc and CG of the DLC3.
    SST 09843-18040
  2. Turn the ignition switch to ON.
    
    Fig 4: Depressing Brake Pedal For Cleaning DTC Stored In ECU
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Clear DTC stored in ECU by depressing the brake pedal 8 or more times within 5 sec.
  4. Check that the ABS warning light shows the normal code.
  5. Remove the SST from the DLC3.
    SST 09843-18040
  HINT:
  
  Disconnect the battery cable during repairs will not erase the DTC in the ECU.
6. In case of using hand-held tester:
  Clear the DTC.
  1. Turn the ignition switch to ON.
  2. Operate the hand-held tester to erase the codes.
  HINT:
  
  Please refer to the hand-held tester operator's manual for further details.

DATA LIST

HINT:

According to the DATA LIST displayed by the Hand-held tester, you can read the value of the switch, sensor, actuator and so on without parts removal. Reading the DATA LIST as a first step of troubleshooting is one of the method to shorten the labor time.

Connect the Hand-held tester to the DLC3.
Turn the ignition switch to ON.

According to the display on tester, read the "DATA LIST".

DATA LIST

Item	Measurement Item / Range (Display)	Normal Condition	Diagnostic Note
ABS MOT RELAY	ABS motor relay / ON or OFF	.....	.....
SOL RELAY	Solenoid relay / ON or OFF	.....	.....
STOP LIGHT SW	Stop light switch / ON or OFF	ON : Brake pedal depressed OFF : Brake pedal released	.....
PKBSW	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
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 / OFF	.....	.....
SFRH	ABS solenoid (SFRH) ON / OFF	.....	.....
SFLR	ABS solenoid (SFLR) ON / OFF	.....	.....
SFLH	ABS solenoid (SFLH) ON / OFF	.....	.....
SRRR	ABS solenoid (SRRR) ON / OFF	.....	.....
SRRH	ABS solenoid (SRRH) ON /OFF	.....	.....
SRLR	ABS solenoid (SRLR) ON / OFF	.....	.....
SRLH	ABS solenoid (SRLH) ON / OFF	.....	.....
AIR BLD SUPPORT	Air bleed support / SUPPORT or NOT SUP	Supported	.....
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.: 19	.....

ACTIVE TEST

HINT:

Performing the ACTIVE TEST using the Hand-held tester allows the relay, actuator and so on to operate without parts removal. Performing the ACTIVE TEST as a first step of troubleshooting is one of the methods to shorten the labor 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 to ON.

According to the display on tester, perform the "ACTIVE TEST".

ACTIVE TEST

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
SFRR & SFRH	Turns ABS solenoid SFRR & SFRH ON / OFF	Operation of solenoid (clicking sound) can be heard
SFLR & SFLH	Turns ABS solenoid SFLR & SFLH ON / OFF	Operation of solenoid (clicking sound) can be heard
SRRH & SRRR	Turns ABS solenoid SRH & SRR ON / OFF	Operation of solenoid (clicking sound) can be heard
SRLR & SRLH	Turns ABS solenoid SRLR & SRLH ON / OFF	Operation of solenoid (clicking sound) can be heard
SFRH & SFLH	Turns ABS solenoid SFRH & SFLH 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
BRAKE WRN LIGHT	Turns BRAKE warning light ON / OFF	Observe combination meter

FREEZE FRAME DATA

The vehicle (sensor) status memorized during ABS operation or at the time of error code detection can be displayed using the hand-held tester.
Only one record of freeze frame data is stored and the freeze frame data generated during ABS operation are constantly updated. Also, the number of the ignition switch's "ON" after the freeze frame data is stored can be memorized 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 abnormality occurs, the freeze frame data at the occurrence of the abnormality is stored but the ABS actuation data is deleted.

FREEZE FRAME DATA

Hand-held tester display

Measurement Item

Reference Value ⁽¹⁾

VEHICLE SPD

Vehicle speed

Speed indication of a meter

STOP LIGHT SW

Stop light switch signal

Stop light switch ON: ON, OFF: OFF

#IGON

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

0 - 31

SYSTEM

Operate system

ABS operate: ABS

⁽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.

SPEED SENSOR SIGNAL CHECK
HINT:

If the ignition switch is turned from ON to ACC or LOCK during test mode, DTC will be erased.
1. In case of not using hand-held tester:
  Check the speed sensor signal.
  1. Turn the ignition switch to ON.
    
    Fig 5: Connecting Terminals Ts and CG of DLC3 Using SST
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Using SST, it connects the terminal Ts and CG of DLC3.
    SST 09843-18040
  3. Start the engine.
  4. Check that the ABS warning light blinks.
    HINT:
    
    If the ABS warning light does not blink, inspect the ABS warning light circuit and Ts circuit (See DTC ALWAYS ON MALFUNCTION IN ABS ECU or ABS WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP) ).
  5. 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.
    
    Fig 6: Checking ABS Warning Light Blinks
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    HINT:
    
    The sensor check may not be completed if the wheels spin or the steering wheels steered during check.
  6. Stop the vehicle.
  7. Using SST, it connects the terminal Tc and CG of the DLC3.
    SST 09843-18040
  8. Read the number of blinks of the ABS warning light.
    HINT:
    - See the list of DTC shown on the DIAGNOSTIC TROUBLE CODE CHART .
    - If every sensor is normal, a normal code is 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.
      
      Fig 7: Blinking Pattern Of Malfunction Code 72 And 76
      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. After performing the check, turn the ignition switch to OFF, and remove the SST from the DLC3.
    SST 09843-18040
2. In case of using hand-held tester:
  Check the speed sensor signal.
  1. Do step (3) to (6) on the previous page.
  2. Read the DTC by following the prompts on the tester screen.
  HINT:
  
  Please refer to the hand-held tester operator's manual for further details.