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Home >> Lexus >> 2001 >> LS 430 V8-4.3L (3UZ-FE) >> Repair and Diagnosis >> Steering and Suspension >> Suspension >> Suspension Control ( Automatic - Electronic ) >> Testing and Inspection >> Reading and Clearing Diagnostic Trouble Codes >> 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 light.
1. Set the absorber control switch to "NORM".
2. Turn the ignition switch ON and check that the absorber control indicator light goes on for 2 seconds.

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

3. Start the engine.




4. Turn the absorber control switch "SPORT" and check the absorber control indicator light.

b. In case of not using LEXUS hand-held tester:
Check the DTC.
1. Turn the ignition switch OFF.




2. Using SST, connect terminals Tc and CG of the DLC3.
SST 09843-18040
3. Start the engine with the door open.
4. Read the DTC output by the absorber control indicator light.

HINT:
- If no code appears, inspect the Tc circuit and absorber control indicator light circuit.




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

5. Codes are explained in the code table.
6. After completing the check, disconnect terminals Tc and CG of the DLC3, and turn off the display.
If 2 or more malfunctions are indicated at the same time the lowest numbered DTC will be displayed 1st.




c. In case of using LEXUS hand-held tester:
Check the DTC.
1. Hook up 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.

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

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




1. Using SST, connect terminals Tc and CG of the DLC3.
SST 09843-18040
2. Turn the ignition switch ON.




3. Clear the DTC stored in ECU by depressing the brake pedal 8 or more times within 5 seconds.

NOTE: By completing the above operation, the DTC of the ABS, TRAC and VSC will be cancelled out.

4. Check that the indicator light shows the normal code.
5. Remove the SST from the terminals of the DLC3.
SST 09843-18040




e. 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. Operating the LEXUS hand-held tester to erase the codes. (See LEXUS hand-held tester operator's manual.)




2. ECU DATA MONITOR BY USING LEXUS HAND-HELD TESTER
a. Hook up the LEXUS hand-held tester to the DLC3.
b. Monitor the ECU data by following the prompts on the tester screen.

HINT: Hand-held tester has a "Snapshot" function and record the monitored data.

3. INPUT SIGNAL CHECK (TEST MODE)

HINT: This check is to see whether signals from the steering sensor and stop light switch, etc. are being input normally to the ECU.

a. In case of not using LEXUS hand-held tester:
Check the input signal (Test mode).
1. Turn the ignition switch OFF.
2. Set each check item in the following table to the condition in Operation (A).




3. Using SST, connect terminals Ts and CG of the DLC3.
SST 09843-18040
4. Start the engine.

HINT:
- At this time the absorber control indicator light comes on for 2 seconds. After that, this light blinks at 0.25 second intervals.




- When the absorber control indicator does not blink, check the Ts terminal circuit.

5. Each check item is set to the condition in Operation (B).

HINT: When (5) is performed, the absorber control indicator light comes on for 1 second.




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

HINT: This should be done with terminals Ts and CG of the DLC3 connected.

7. Read the DTC output by the absorber control indicator light.

HINT:
- See the list of DTC.
- Reading method of the code is the same as that of the diagnosis code.
- When the DTC is not output, check the Tc terminal circuit.




As an example, the blinking patterns for normal code and code 81 are as shown in the illustration.

8. Check the malfunction using the code in the following table.
9. Remove the SST from the terminals of the DLC3.
SST 09843-18040




b. In case of using LEXUS hand-held tester:
Check the input signal.
1. Hook up the LEXUS hand-held tester to the DLC3.
2. Do step (1) to (5).
3. Read the DTC by following the prompts on the tester screen.

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

Detection Item:




DTC of the input signal check:
If a malfunction code is displayed during the test mode DTC check, check the circuit listed for that code. For details of each code, turn to respective troubleshooting mentioned below "DTC No." in the DTC chart.

c. Finishing the input signal check (Test mode).
With the ignition switch OFF, disconnect the SST from the terminals of the DLC3 and then turn the ignition switch ON.
SST 09843-18040




4. DAMPING FORCE CONTROLLING CONDITION CHECK
a. Using SST connect terminals Ts and CG of the DLC3.
SST 09843-18040
b. Turn the ignition switch ON.
c. Check that the damping force changes from soft to hard, when the absorber control switch is turned ON and OFF, while each corner of the vehicle is swung up and down.

HINT:
- When terminals Ts and CG of the DLC3 are connected the absorber control indicator light blinks by 1 Hz.
- When the absorber control indicator light does not flash, check the Ts terminal of DLC3 circuit.

d. Turn the ignition switch OFF, remove SST from the terminals of the DLC3.







5. REFERENCE VALUE OF ECU DATA
a. Hook up the LEXUS hand-held tester to the DLC3.
b. Monitor the ECU data by following the prompts on the tester screen.
Please refer to the LEXUS hand-held tester operator's manual for more information.
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