Displaying & Reading Trouble Codes

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


DIAGNOSIS SYSTEM





a. Check the indicator light.
1. Turn ignition switch ON.
2. Check that height control indicator light and height control OFF indicator light go on for 2 seconds.
If the indicator does not light, inspect the height control OFF indicator light circuit and height control indicator light circuit.

b. In case of not using LEXUS hand-held tester:
Check the DTC.
1. Check the battery positive voltage.
2. Check that the generator is generating electricity when engine running.
3. Check that other system is normal.





4. Using SST, connect terminals between Tc and E1 of DLC1.

SST 09843-18020

5. Turn ignition switch ON.




6. Read the DTC output by height control OFF indicator light on the combination meter.

HINT:
- If no code appears, inspect the Tc terminal circuit or height control OFF indicator light circuit.




- As an example, the blinking patterns for normal code, 11 and 31 are as shown on the illustration.

7. Codes are explained in the code table.Suspension Control ( Automatic - Electronic Level )
8. After completing the check, disconnect terminals Tc and E1, and turn off the display.

HINT: In the event of 2 or more malfunction codes, indication will begin from the smaller numbered code and continue in order to the larger.





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 DTCs by following the prompts on the tester screen.

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






INPUT SIGNAL CHECK (TEST MODE CHECK)

HINT: This function check if signals from the steering sensor, 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.
1. Turn the ignition switch OFF.
2. Set each of the check items in the table below to the condition in Operation (A).




3. Using SST, connect terminals Ts and E1 of DLC1.

SST 09843-18020

4. Turn ignition switch ON.






HINT:
- At this time the height control OFF indicator light come on 2 seconds. After, this light flashes at 0.25 seconds intervals.
- When the height control OFF indicator is not flashes, check the Ts terminal circuit.

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






HINT: When operation of the check items, the height control OFF indicator light come on 1 second.





6. Using SST, connect terminal Tc and E1 of DLC1.

SST 09843-18020

HINT: This should be done while you connect terminals Ts and E1.




7. Read the test DTC output by height control OFF indicator light.

HINT:
- As an example, the blinking patterns for codes normal and 81 are as shown on the illustration.
- If 2 or more malfunction are indicated at the same time, the lowest numbered code will be displayed first.
- When the DTC is not output, check the Tc terminal circuit.




8. Check the malfunction using the code table.
9. Desert from me input signal check mode. With the ignition switch OFF, disconnect the SST from DLC1 and then turn ignition switch ON.

SST 09843-18020





b. In case of using the LEXUS hand-held tester:
Check the input signal.

1. Turn the ignition switch OFF.
2. Set each of the check items in the table below to the condition in Operation (A).
3. Hook up the LEXUS hand-held tester to the DLC3.
4. Turn the ignition switch ON.
5. Select the SIGNAL CHECK mode on the LEXUS hand-held tester.
6. Each of the check items is set to the condition in Operation (B).

HINT: Individual checking of each signal in step 5.can be performed.

7. Read the DTC by following prompts on the tester screen.

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