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Home >> Lexus >> 2001 >> 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/Vehicle Skid Control (VSC) >> 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 indicator.
When the ignition switch is turned ON, check that the ABS warning light comes on for 3 seconds.

HINT: If the indicator check result is not normal, proceed to the troubleshooting for the ABS warning light circuit.




b. In case of not using LEXUS hand-held tester:
Check the DTC.
1. Disconnect the short pin from the DLC1.




2. Using SST, connect terminals Tc and E1 of the DLC1, or terminals Tc and CG of the DLC3.
SST 09843-18020 or 09843-18040
3. Turn the ignition switch ON.
4. Read the DTC from the ABS warning light on the combination meter.

HINT:
- If no code appears, inspect the diagnostic circuit or ABS warning light circuit.




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

5. Codes are explained in the code table.
6. After completing the check, disconnect terminals Tc and E1 of the DLC1, or terminals Tc and CG of the DLC3, and turn off the display.
If 2 or more malfunctions are indicated simultaneously the lowest numbered DTC will be displayed first.




c. In case of using LEXUS hand-held tester:
Check the DTC.
1. Connect the LEXUS hand-held tester to the DLC3.
2. Turn the ignition switch ON.
3. Read the DTC by following the prompts on the tester screen.




d. In case of not using LEXUS hand-held tester:
Clear the DTC.
1. Using SST, connect terminals Tc and E1 of the DLC1 or terminals Tc and CG of the DLC3, and remove the short pin from the DLC1.
SST 09843-18020 or 09843-18040
2. Turn the ignition switch ON.
3. Clear the DTC stored in the ECU by depressing the brake pedal 8 or more times within 5 seconds.
4. Check that the warning light shows the normal code.
5. Remove the SST from the DLC1 or the DLC3.
SST 09843-18020 or 09843-18040




6. Connect the short pin to the DLC1.

HINT: The DTC stored in the ECU will be not erased when the battery terminal is disconnected for the troubleshooting.




e. In case of using LEXUS hand-held tester:
Clear the DTC.
1. Connect the LEXUS hand-held tester to the DLC3.
2. Turn the ignition switch ON.
3. Operate the LEXUS hand-held tester to erase the codes.




2. Test Mode:
SENSOR SIGNAL CHECK

HINT: If the ignition switch is turned from ON to ACC or LOCK during test mode, DTC will be erased.

a. In case of not using LEXUS hand-held tester:
Check the sensor signal.
1. Turn the ignition switch OFF.
2. Using SST, connect terminals Ts and E1 of the DLC1 or terminals Ts and CC of the DLC3.
SST 09843-18020 or 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 the flat place for 1 sec. or more.
6. Keeping the vehicle in the stationary condition and the brake pedal in free condition for 1 Sec. or more, continue to depress the brake 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: The above mentioned condition comes into existence, the ABS warning light comes ON for 3 seconds.

8. Drive the 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 rear wheels spun or its steering wheel steered during this check.

9. Stop the vehicle.
10. Using SST, connect terminals Tc and E1 of the DLC1 or terminals Tc and CG of the DLC3.
SST 09843-18020 or 09843-18040
11. Read the number of blinks of the ABS warning light.






HINT:
- See the DTC list shown.
- If every sensor is normal, a normal code is output (A cycle of 0.25 seconds ON and 0.25 seconds OFF is repeated).
- If 2 or more malfunctions are indicated simultaneously, the lowest numbered code will be displayed first.

12. After doing the check, disconnect the SST from terminals Ts and E1, Tc and E1 of the DLC1 or terminals Ts and CG, Tc and CG of the DLC3, and turn the ignition switch OFF.
SST 09843-18020 or 09843-18040




b. In case of using LEXUS hand-held tester:
Check the sensor signal.
1. Connect the LEXUS hand-held tester to the DLC3.
2. Do step (3) to (9) .
3. Read the DTC by following the prompts on the tester screen.

C1271/71 - C1281/81:




DTC of sensor check function:

3. w/VSC:
DECELERATION SENSOR OPERATION DIAGNOSIS SYSTEM

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







4. w/VSC:
DECELERATION SENSOR CHECK
a. Connect 3 dry batteries of 1.5 V in series.
b. Connect VGS terminal to the batteries' positive (+) terminal, and G GND terminal to the batteries' negative (-) terminal, apply about 4.5 V between VGS - G GND terminals.

NOTE:
- When inspecting deceleration sensor, remove it with the bracket together. Do not remove the sensor from the bracket. When replacing deceleration sensor, replace the sensor with it assembled to the bracket assembly.
- Do not apply voltage of 6 V or more to terminals VGS and GGND.

c. Check the output voltage of GL1 and GL2 terminals.

HINT:
- If the sensor is tilted too much it may show the wrong value.
- If dropped, the sensor should be replaced with a new one.
- The sensor removed from the vehicle should not be placed upside down.
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