Abs With EBD System - Diagnostics: Pre-Check

DIAGNOSIS SYSTEM
1. Release the parking brake pedal.
2. Check the warning light.
  When the ignition switch is turned ON, check that the ABS warning light and BRAKE warning light turns on for 3 sec.
  
  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 ABS WARNING LIGHT CIRCUIT (REMAINS ON) or ABS WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP) ) or BRAKE WARNING LIGHT CIRCUIT (See ).
  Fig 1: Locating ABS Brake Warning Light
  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 ON.
  3. Read the DTC from the ABS warning light on the combination meter.
    HINT:
    - If a code does not appear, inspect the diagnostic circuit or ABS warning light circuit (See ABS WARNING LIGHT CIRCUIT (REMAINS ON) or ABS WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP) ).
      
      Fig 2: Identifying DLC3 Connector TC & CG Terminals
      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    - As an example, the blinking patterns for normal code and codes 11 and 21 are shown on the left.
  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, connect the terminals Tc and CG of the DLC3.
    SST 09843-18040
  2. Turn the ignition switch ON.
    
    Fig 3: Identifying Normal Code Blinking Pattern
    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:
  
  Disconnecting 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 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.

Fig 4: Identifying DTC Clearing Procedures
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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.
1. Connect the hand-held tester to the DLC3.
2. Turn the ignition switch ON.
3. According to the display on tester, read the "DATA LIST".
Fig 5: Data List Chart (1 Of 2)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 6: Data List Chart (2 Of 2)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

ACTIVE TEST

HINT:

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

ACTIVE TEST

Item	Vehicle Condition / Test Details	Diagnostic Note
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
SRH & SRR	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
1. The vehicle (sensor) status at the occurrence of abnormality of the diagnosis code and during the ABS operation can be memorized and displayed using the hand-held tester.
2. Only one record of freeze frame data is stored, however, freeze frame data during the ABS operating is always updated. After the storage of freeze frame data, up to 31 ignition "ON" operations are stored and displayed.
  HINT:
  
  If the ignition switch "ON" operation exceeds 31 times, "31" appears on the display.
3. 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.
Fig 7: Freeze Frame Data Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*: 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 of sensor check function will be erased.
During test mode, ECU records all DTC of sensor check function. By preforming sensor signal check, the codes are erased if normality is confirmed. The codes left over are the codes where abnormality was found.

In case of not using hand-held tester:
Check the speed sensor signal.
1. Turn the ignition switch ON.
2. Using SST, connect the terminals Ts and CG of DLC3.
  SST 09843-18040
3. Start the engine.
  
  Fig 8: Identifying DLC3 Connector TS & CG Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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 ABS WARNING LIGHT CIRCUIT (REMAINS ON) , ABS WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP) and TS TERMINAL CIRCUIT ).
5. Drive the vehicle straight forward.
  HINT:
  
  Drive the vehicle faster than 45 km/h (28 mph) for several sec.
6. Stop the vehicle.
7. Using SST, connect the terminals Tc and CG of the DLC3.
  SST 09843-18040
  
  Fig 9: Identifying ABS Warning Light Blinking Pattern
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
8. Read the number of blinks of the ABS warning light.
  HINT:
  - See the list of DTC shown on the 05-427.
  - 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 10: Identifying Malfunction Code Blinking Pattern (72, 76)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
9. After doing the check, turn the ignition switch OFF, and remove the SST from the DLC3.
SST 09843-18040
In case of using hand-held tester:
Check the sensor signal.
1. Do step ( 3) 4 5 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.