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Home >> Lexus >> 2002 >> ES 300 V6-3.0L (1MZ-FE) >> Repair and Diagnosis >> Brakes and Traction Control >> Antilock Brakes / Traction Control Systems >> Testing and Inspection >> Reading and Clearing Diagnostic Trouble Codes >> ABS W/EBD & BA & TRAC & VSC System >> Displaying & Reading Trouble Codes

Displaying & Reading Trouble Codes

NOTE: This is the only information provided by the manufacturer for Reading Diagnostic Trouble Codes for this system.

PRE-CHECK

1. DIAGNOSIS SYSTEM




a. Check the warning lights and buzzer.
1. Release parking brake pedal.
2. When the ignition switch is turned ON, check that the ABS warning light, BRAKE warning light, VSC warning light, TRAC OFF indicator light and SLIP indicator light goes on for approx. 3 seconds.
3. When depressing the brake pedal repeatedly it may turn on the BRAKE warning light and buzzer.

HINT:
- When the parking brake is applied or the level of the brake fluid is low, the BRAKE warning light is lit.
- If the ECU stores DTC, ABS warning light , VSC warning light and TRAC OFF indicator light is ON.
- If the indicator check result is not normal, proceed to troubleshooting for the light circuit.

Trouble Area
ABS warning light circuit
BRAKE warning light circuit
VSC warning light circuit
TRAC OFF indicator light circuit
SLIP indicator light circuit
Skid control buzzer




b. 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 or 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.

Trouble Area
Tc terminal circuit
ABS warning light circuit
VSC warning light circuit




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

4. Codes are explained in the code table.
5. After completing the check, disconnect terminal Tc and CG of DLC3, and turn off the display.

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

c. In case of using the hand-held tester:
Check the DTC.

1. Hook up 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: Please refer to the hand-held tester operator's manual for further details.

d. In case of not using hand-held tester:
Clear the DTC.




1. Using SST, connect the terminals Tc and CG of the DLC3.
SST 09843-18040

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 and VSC 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.

e. 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.

2. 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.

Part 1:




Part 2:




Part 3:




a. Connect the hand-held tester to the DLC3.
b. Turn the ignition switch ON.
c. According to the display on tester, read the "DATA LIST".

3. 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.

Part 1:




Part 2:




It is possible to display the DATA LIST during the ACTIVE TEST.
a. Connect the hand-held tester to the DLC3.
b. Turn the ignition switch ON.
c. According to the display on tester, perform the "ACTIVE TEST".

4. FREEZE FRAME DATA
a. The vehicle (sensor) status memorized during ABS and/or VSC operation or at the time of error code detection can be displayed by the hand-held tester.
b. Only one record of freeze frame data is stored and the freeze frame data generated during ABS and/or VSC 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.




c. 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.

5. SENSOR SIGNAL CHECK (TEST MODE)

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 performing sensor signal check, the codes are erased if normality is confirmed. The codes left over are the codes where abnormality was found.

a. In case of not using hand-held tester:
Check the ABS sensor signal.




1. Turn the ignition switch OFF.
2. Using SST, connect terminals 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 terminal circuit.

5. Keep the vehicle in the stationary condition on a flat place for 1 sec. or more.
6. Keeping the vehicle in the stationary condition and the break pedal in free condition for 1 sec. or more, continue to depress the break pedal with 147 N (15 kgf, 33 lbf) or more for 1 sec. or more.
7. Keeping the vehicle in the stationary condition, depress the brake pedal with 98 N (10 kgf, 22 lbf) or more quickly.

HINT: Under the above mentioned condition, the ABS warning light turns ON for 3 seconds.

8. Drive vehicle straight forward.
When driving the vehicle at the speed faster than 45 km/h (28 mph) for several seconds, check that the ABS warning light comes off.

HINT: There is a case that the sensor check is not completed if the vehicle has its wheels spun or its steering wheel steered during this check.

9. Stop the vehicle.
10. Using SST, connect terminals Tc and CG of DLC3.
SST 09843-18040

11. Read the number of blinks of the ABS warning light.






HINT:
- See the list of DTC.
- 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.

12. After performing the check, disconnect terminals Ts and CG, Tc and CG of DLC3, and turn the ignition switch OFF.
SST 09843-18040

b. In case of using hand-held tester:
Check the ABS sensor signal.

1. Perform step (3) to (9) of the step (a).
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.

c. In case of not using hand-held tester:
Check the VSC sensor signal.




1. Turn the ignition switch OFF.
2. Check that the shift lever position is at P range, turn the steering wheel to the neutral position.
3. Using SST, connect terminals Ts and CG of DLC3.
SST 09843-18040

4. Start the engine.




5. Check that the VSC warning light blinks.

HINT: If the VSC warning light does not blink, inspect the VSC warning light circuit and Ts terminal circuit.

6. When a new ECU is installed:
Start the engine and keep the vehicle in the stationary condition on the flat place for 3 sec. or more.

7. Check the steering angle sensor.
From the vehicle stationary condition, turn the steering wheel to either left or right to the full lock position, and turn back the steering wheel to the neutral position.




8. Check the yaw rate sensor.
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. 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 completed normally.
- If the VSC buzzer does not sound, check the VSC buzzer circuit, then perform the sensor check again.
- If the VSC 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 ° ± 15 ° of its start position.
- Do not spin the wheels.

9. Using SST, connect terminals Tc and CG of DLC3.
SST 09843-18040

10. Read the number of blinks of the VSC warning light.






HINT:
- See the list of DTC.
- 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.

11. After performing the check, disconnect the SST from terminals Ts and CG, Tc and CG of DLC3 and turn the ignition switch OFF.
SST 09843-18040

d. In case of using hand-held tester:
Check the VSC sensor signal.

1. Perform step (4) to (8) of the step (c).
2. Read the DTC by following the tester screen.

HINT: Please refer to the hand-held tester operator's manual for further details.

6. YAW RATE SENSOR ZERO POINT CALIBRATION

HINT:
- When having replaced the yaw rate sensor, deceleration sensor or the ECU, make sure to perform yaw rate and deceleration sensors' zero point calibration. Be sure to complete this step 7. once it is started.
- During step 7., a non replaced sensor also requires zero point calibration.

NOTE:
- While obtaining the zero point, keep the vehicle in stationary condition and do not tilt, move or shake the vehicle
- Be sure to perform this on a level surface (within an inclination of 1 %).




a. Clear the zero points of the yaw rate and deceleration sensors.
1. Shift the shift lever to P range.
2. Turn the ignition switch ON in a stationary condition.
3. With the lit switch ON, using SST, repeat a cycle of short and open between terminals Ts and CG of DLC3 4 times or more within 8 sec. Check that the TRC OFF indicator light is lit indicating the recorded zero point is erased.
SST 09843-18040

4. Turn the ignition switch OFF.

b. Obtain zero point of the yaw rate sensor.
1. Make the terminals Ts and CG of DLC3 disconnected.
2. Turn the ignition switch ON.

HINT: The vehicle should be in a stationary condition with the shift lever in P range.

3. Check that the lit TRC OFF indicator light turns off about 15 sec. after the ignition switch is turned ON.

HINT: Even if the ignition is not turned OFF in step (a)-(4) and remains ON, the yaw rate sensor zero point calibration can be completed. In this case, the TRC OFF indicator light is lit for about 15 sec. and then starts blinking. (Normal code)

4. After ensuring that the TRC OFF indicator light remains OFF for 2 sec., turn the ignition switch OFF.

HINT: If the ignition switch is not turned OFF in step (a)-(4), make sure that the TRC OFF indicator light blinks for 2 sec.. Then turn the ignition switch OFF.

c. Perform deceleration sensor zero point calibration.

NOTE: After step (b) (the yaw rate sensor zero point calibration), the VSC warning light goes off. At this time, if the vehicle is driven without performing step (c) (deceleration sensor zero point calibration), deceleration sensor zero point calibration malfunction will be detected and the VSC warning light will light up. Therefore, perform step (c) right after step (b).




1. Using SST, connect the terminals Ts and CG of DLC3.
SST 09843-18040

2. Turn the ignition switch ON.

HINT: Place the vehicle in a stationary condition with the shift lever in P range.




3. After turning the ignition switch ON, check that the VSC warning light is lit for about 4 sec. and then starts quick blinking at 0.13 sec. intervals.

4. After confirming the blinking of the TRC OFF indicator light for 2 sec., turn the ignition switch OFF.

5. Remove the SST and make the terminals Ts and CG of DLC3 disconnected.
SST 09843-18040

7. DECELERATION SENSOR OPERATION DIAGNOSIS SYSTEM

CAUTION: While checking the deceleration sensor operating diagnosis system, ABS does not operate and brake system operates as a conventional brake system.





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