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, TRAC OFF indicator light and SLIP indicator light come on for 3 seconds.

HINT: If the indicator check result is not normal, proceed to the troubleshooting for the ABS warning light circuit, TRAC OFF indicator light circuit and SLIP indicator 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 and TRAC OFF indicator light on the combination meter.

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




- As an example, the blinking patterns of 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 1st.




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 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 of the DLC1 or DLC3.
SST 09843-18020 or 09843-18040




e. Connect the short pin to the DLC1.

HINT: The DTC stored in the ECU will be erased when the battery terminal is disconnected for the troubleshooting.




f. In case of using LEXUS hand-held tester:
Clear the DTC.
1. Hook up 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. SPEED SENSOR SIGNAL CHECK
a. In case of not using LEXUS hand-held tester:
Check the speed sensor signal.
1. Turn the ignition switch OFF.
2. Using SST, connect terminals Ts and E1 of the DLC1 or terminals Ts and CG 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.

5. Drive the vehicle straight forward.
Drive the vehicle faster than 45 km/h (28 mph) for several seconds.
6. Stop the vehicle.
7. Using SST, connect terminals Tc and E1 of the DLC1, or terminals Tc and CG of the DLC3.
SST 09843-18020 or 09843-18040
8. Read the number of blinks of the ABS warning light.






HINT:
- See the list of DTC list shown.
- If every sensor is normal, the 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.

9. 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 speed sensor signal.
1. Connect the LEXUS hand-held tester to the DLC3.
2. Do step (3) to (6).
3. Read the DTC by following the prompts on the tester screen.

C1271/71 - C1278/78:

DTC of speed sensor check function: