Section 12 (Abs With EBD System - Diagnostics): Pre-Check

WARNING: This page is about a different car, the 2004 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSIS SYSTEM
1. Release the parking brake pedal.
2. Check the warning lights.
  When the ignition switch is turned ON, check that the ABS warning light and brake warning light come on for 3 sec.
Fig 1: Identifying ABS Warning Light & Brake Warning Light
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NOTE:
- 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 (See DTC ALWAYSON MALFUNCTION IN ABS ECU or ABS WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP) ) or BRAKE WARNING LIGHT CIRCUIT ).
DTC CHECK (USING SST CHECK WIRE)
1. Checking DTCs using a SST check wire.
  SST 09843-18040
  1. Using SST, connect terminal Tc and CG of the DLC3.
  2. Turn the ignition switch ON.
  3. Read the DTC from the ABS warning light on the combination meter.
    NOTE:
    If no code appears, inspect the diagnostic circuit or ABS warning light circuit (See DTC ALWAYSON MALFUNCTION IN ABS ECU or ABS WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP) ).
    
    As an example, the blinking patterns for normal code and codes 11 and 21 are shown on the left.
    
    Fig 3: Blinking Patterns Of Normal Code & Code 11 & 21
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Codes are explained in the code table DIAGNOSTIC TROUBLE CODE CHART
    If 2 or more DTCs are detected at the same time, the lowest numbered DTC is displayed 1st.
  5. After completing the check, remove the SST from the DLC3.
2. Clearing the DTCs using the SST check wire.
  SST 09843-18040
  1. Using SST, connect the terminal Tc and CG of the DLC3.
  2. Turn the ignition switch ON.
  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.
  Fig 4: Identifying Brake Switch & Depressing Brake Pedal
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NOTE: Disconnect the battery cable during repairs will not erase the DTC in the ECU.
DTC CHECK (USING HAND-HELD TESTER)
1. Checking DTCs using the Hand-held tester.
  1. 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.
  2. Clearing the DTCs using the hand-held tester.
    1. Turn the ignition switch to ON.
    2. Operate the hand-held tester to erase the codes.
    NOTE: Please 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 data list can be displayed. Follow the prompts on the tester screen to access the Data List.

Fig 5: Tester Display Data List Chart (1 Of 2)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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.

From the display on the tester, select the "ACTIVE TEST".

TESTER DISPLAY 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 memorized during ABS operation or at the time of malfunction code detection can be displayed using the hand-held tester.
Only one record of the freeze frame data is stored and the freeze frame data generated during ABS operation are constantly updated. Also, the number of the operations of the ignition switch "ON" after the freeze frame data is stored can be memorized up to 31 and it can be displayed.
NOTE: 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.

TESTER DISPLAY 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

# IG ON

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

0 to 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
NOTE: If the ignition switch is turned from ON to ACC or LOCK during test mode, the DTCs will be erased.
1. Procedure for speed sensor signal check using a SST check wire.
  
  Fig 7: Identifying DLC3 Connector Terminals TS & CG Of Speed Sensor
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  SST 09843-18040
  1. Turn the ignition switch to OFF.
  2. Using SST, it connects the terminal Ts and CG of DLC3.
    SST 09843-18040
  3. Start the engine.
  4. Check ABS Warning Light Blinks
    
    Fig 8: Checking ABS Warning Light Blinks
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    NOTE: If the ABS warning light does not blink, inspect the ABS warning light circuit and Ts circuit (See DTC ALWAYSON MALFUNCTION IN ABS ECU or ABS WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP) and TS TERMINAL CIRCUIT ).
  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 goes off.
    NOTE: The sensor check may not be completed if the wheels spin or the steering wheel steered during the 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.
    NOTE:
    See the list of DTCs shown on 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 DTCs are detected at the same time, the lowest numbered code will be displayed.
    Fig 9: Blinking Pattern Of ABS Warning Light Code 72, 76
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. After performing the check, turn the ignition switch OFF, and remove the SST from the DLC3.
    SST 09843-18040
2. Procedure for speed sensor signal check using the hand held tester.
  1. Connect the hand-held tester.
  2. Turn the ignition switch ON.
  3. Perform the step (3) to (6) on the previous page.
  4. Read the DTC by following the prompts on the tester screen.
  5. After completing the check disconnect the tester and turn the ignition switch OFF.
  NOTE: Please refer to the hand-held tester operator's manual for further details.