Input Signal Check (Test Mode)

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 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 the 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 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.

DTC OF INPUT SIGNAL CHECK

C1781/81 - C1796/96:

If a malfunction code is displayed during the test DTC check, check the circuit listed for that code. For details of each code,referred to the respective "DTC No." in the DTC chart.