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 approx. 3 seconds.
  NOTE:
  - 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 or brake warning light circuit (ABS WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP) or BRAKE WARNING LIGHT CIRCUIT ).
    
    Fig 1: Identifying ABS Warning lights
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. In case of not using hand-held tester:
  Check the DTC.
  1. Using SST, it connects terminal 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.
    
    Fig 2: Identifying DLC3 Connector Terminal
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE:
    If no code appears, inspect the diagnostic circuit or ABS warning light circuit (TC TERMINAL CIRCUIT or ABS WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP) ).
    
    As an example, the blinking patterns for normal code and codes 11 are shown on the left.
    
    Fig 3: Measuring Normal & 11 Codes Blinking Patterns Graph
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Codes are explained in the code table. See DIAGNOSTIC TROUBLE CODE CHART .
  5. After completing the check, disconnect terminals Tc and CG, and turn off the ignition switch.
    Even if 2 or more malfunctions are detected, the lowest numbered DTC will be displayed.
4. In case of using hand-held tester:
  Check the DTC.
  1. Hook up the hand-held tester to the DLC3.
    
    Fig 4: Locating DLC3 Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Turn the ignition switch to ON.
  3. Read the DTC by following the prompts on the tester screen.
    NOTE:
    Please refer to the hand-held tester operator's manual for further details.
5. In case of not using hand-held tester:
  Clear the DTC.
  1. Using SST, it connects terminal Tc and CG of DLC3.
    SST 09843-18040
  2. Turn the ignition switch to ON.
  3. Clear the DTC stored in ECU by depressing the brake pedal 8 or more times within 5 seconds.
    
    Fig 5: Clearing DTC's (W/O Hand Held Tester)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Check that the warning light shows the normal code.
  5. Remove the SST from the terminals of DLC3.
    SST 09843-18040
6. In case of using hand-held tester:
  Clear the DTC.
  1. Hook up the hand-held tester to the DLC3.
    
    Fig 6: Locating DLC3 Connection
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Turn the ignition switch to ON.
  3. Operate the hand-held tester to erase code.

DATA LIST

NOTE:

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 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".

DLC3 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 lamp switch/ON or OFF

ON: Brake pedal depressed

STOP LIGHT SW

Stop lamp switch/ON or OFF

OFF: Brake pedal released

PKB SW

Parking brake switch/ON or OFF

ON: Parking brake applied

PKB SW

Parking brake switch/ON or OFF

OFF: Parking brake released

ABS OPERT FR

ABS operation (FR)/BEFORE or OPERATE

BEFORE: No ABS operation (FR)

ABS OPERT FR

ABS operation (FR)/BEFORE or OPERATE

OPERATE: During ABS operation (FR)

ABS OPERT FL

ABS operation (FL)/BEFORE or OPERATE

BEFORE: No ABS operation (FL)

ABS OPERT FL

ABS operation (FL)/BEFORE or OPERATE

OPERATE: During ABS operation (FL)

ABS OPERT RR

ABS operation (RR)/BEFORE or OPERATE

BEFORE: No ABS operation (RR)

ABS OPERT RR

ABS operation (RR)/BEFORE or OPERATE

OPERATE: During ABS operation (RR)

ABS OPERT RL

ABS operation (RL)/BEFORE or OPERATE

BEFORE: No ABS operation (RL)

ABS OPERT RL

ABS operation (RL)/BEFORE or OPERATE

OPERATE: During ABS operation (RL)

WHEEL SPD FR

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 SW⁽¹⁾

Deceleration sensor/HIGH, MIDDLE or LOW

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

VEHICLE SPD

Speedometer Min.: 0 km/h (0 MPH), max.: 255 km/h (158 MPH)

Actual vehicle speed

TEST MODE

Test mode/NORMAL or TEST

NORMAL: Normal mode

TEST MODE

Test mode/NORMAL or TEST

TEST: During test mode

#CODES

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

Min.: 0, max.: 19

⁽¹⁾	4WD models

ACTIVE TEST

NOTE:

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".

DLC3 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
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 at the occurrence of abnormality of the diagnosis code and during the ABS operating can be memorized and displayed using the hand-held tester.

NOTE:

If the ignition switch "ON" operation exceeds 31 times, "31" appears on the display.
The ignition switch operation by itself does not count. (Driving the vehicle is necessary for the count.)

Only one record of freeze frame data is stored, however, freeze frame data during the ABS operation is always up-dated. After the storage of freeze frame data, up to 31 ignition "ON" operations are stored and displayed.

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.

MEASUREMENT REFERENCE

Hand-Held Tester Display

Measurement Item

Reference Value⁽¹⁾

VEHICLE SPD

Vehicle speed

Speed indication of a meter

SPD GRADE

Vehicle speed gradient

-1.5 - 1.5

STOP LIGHT SW

Stop lamp switch signal

Stop lamp switch ON: ON, OFF: OFF

# IG ON

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

0 - 31

⁽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.

In case of not using hand-held tester: SPEED SENSOR SIGNAL AND DECELERATION SENSOR (4WD) CHECK
1. Check the speed sensor signal.
  1. Turn the ignition switch to OFF.
  2. Using SST, it connects terminal Ts and CG of DLC3.
    SST 09843-18040
  3. Start the engine.
    
    Fig 7: Identifying DLC3 Connector Terminals
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Check that the ABS warning light blinks.
    
    Fig 8: Checking ABS Warning Light Blink Pattern
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    NOTE:
    If no code appears, inspect the diagnostic circuit or ABS warning light circuit (TC TERMINAL CIRCUIT or ABS WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP) ).
  5. Drive vehicle straight forward.
    NOTE:
    Drive vehicle faster than 45 km/h (28 mph) for several seconds.
  6. Stop the vehicle.
  7. Using SST, it connects terminal Tc and CG of DLC3.
    SST 09843-18040
  8. Read the number of blinks of the ABS warning light.
    NOTE:
    Codes are explained in the code table. See 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 repeating).
    
    - If 2 or more malfunction are indicated at the same time, the lowest numbered code will be displayed 1st.
    
    Fig 9: Reading Malfunction Codes 72 & 76
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. After performing the check, disconnect terminal Ts and CG, Tc and CG of DLC3, and turn to OFF the ignition switch.
2. 4WD:
  Check the deceleration sensor detection point.
  1. Turn the ignition switch to OFF.
  2. Using SST, it connects terminal Ts and CG of DLC3.
    SST 09843-18040
  3. Start the engine.
    
    Fig 10: Identifying DLC3 Connection Terminals
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Check that the ABS warning light blinks.
    
    Fig 11: Checking ABS Warning Light Blink Pattern
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    NOTE:
    If no code appears, inspect the diagnostic circuit or ABS warning light circuit (TC TERMINAL CIRCUIT or ABS WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP) ).
  5. Jack up the rear side of the vehicle slowly, as shown in the illustration.
    
    Fig 12: Jacking Up Rear Side Of Vehicle Slowly
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    NOTE:
    When measuring the height, measure at the center of the lower body of the vehicle.
  6. Check that the ABS warning light blinks.
    If the ABS warning light remains on, inspect the deceleration sensor installation. If the sensor installation is OK, replace the deceleration sensor.
  7. Jack down the vehicle slowly.
  8. Jack up the front side of the vehicle slowly, as shown in the illustration.
    
    Fig 13: Measuring At Center Of Lower Body Of Vehicle
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    NOTE:
    When measuring the height, measure at the center of the lower body of the vehicle.
  9. Check that the ABS warning light blinks.
    If the ABS warning light remains on, inspect the deceleration sensor installation. If the sensor installation is OK, replace the deceleration sensor.
  10. Jack down the vehicle slowly.
  11. Using SST, it connects terminal Tc and CG of DLC3.
    SST 09843-18040
  12. Read the number of blinks of the ABS warning light.
    NOTE:
    Codes are explained in the code table. See 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 repeating).
  13. After performing the check, disconnect terminal Ts and CG, Tc and CG of DLC3, and turn to OFF the ignition switch.
    SST 09843-18040
In case of using hand-held tester: SPEED SENSOR SIGNAL AND DECELERATION SENSOR (4WD) CHECK
1. Check the speed sensor signal.
  1. Hook up the hand-held tester to the DLC3.
    
    Fig 14: Locating DLC3 Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Select the ACTIVE TEST mode on the hand-held tester.
  3. Do step 5.-(a) - (3) to (6) in previous test.
  4. 4WD:
    Do step 5.-(b) - (3) to (10) in previous test.
  5. Read the DTC by following the prompts on the tester screen.
    NOTE:
    Please refer to the hand-held tester operator's manual for further details.
    
    Codes are explained in the code table. See DIAGNOSTIC TROUBLE CODE CHART .