Pre-Check

PRE-CHECK

1. Diagnosis system.
a. Check the TEM output (LED lightening check).





1. Connect the LED to terminals TEM and E1 of DLC2.

NOTICE: If connected reversely, the LED does not light.

HINT: Use the LED whose recommended operating current is 10 - 20 mA.

2. Turn the ignition switch ON, and check that the LED lights for about 2 seconds.

HINT: If the LED does not light, inspect the TEM circuit.

b. DTC the check.
1. Check the battery positive voltage.
Battery positive voltage: 10 - 14 V (When is stopped the engine)





2. After driving the vehicle, using Special Service Tool (SST) 09843-18020 or equivalent, connect between terminals Tc and E1 of DLC2 or DLC1.


HINT:
- Do not stop the engine.
- In this condition, the ignition switch is ON.

NOTICE: The wrong connection of the connector may cause malfunction. Use extreme caution when connecting the connector.






3. Connect the LED to terminals TEM and E1 of DLC2.





4. Check the number that the LED blinks.






HINT:
- When the code is normal, the LED comes on for 0.25 sec. and goes off for 0.25 sec. repeatedly.
- When more than 2 diagnosis codes are detected, the diagnosis codes are displayed in the order form the smallest number.
- If no code appears, inspect the diagnostic circuit.
- Code are explained in the code table.


5. Disconnect the SST 09843-18020 from the terminals Tc and E1 of DLC2 or DLC1.
Confirm that the connected LED is off.
6. When the abnormal code is output, inspect the function, absorber control ECU and input signal.





c. Check the damping force controlling condition.
1. Using SST 09843-18020, connect terminals Ts and E1 of DLC1 with the ignition switch OFF (TEST mode).
2. Start the engine.
In this condition, the absorber control actuator position becomes 1 (Soft).
3. Starting from the above mentioned position, as the brake pedal is depressed, the absorber control actuator position increase (1 -> 2 -> 3 -> ...15 -> 16).
At this time, bounce the vehicle and check that the shock absorber is becoming harder.

HINT:
- To hold the shock absorber control actuator at a specific position, adjust it to the position using the above mentioned procedure then increase the vehicle speed to over 5 km/h.
After that the shock absorber control actuator position does not change until the ignition switch is turned OFF.
- If the absorber control actuator does not operate, inspect the absorber control actuator circuit and absorber control ECU.

4. Disconnect the SST 09843-18020 from the terminals Ts and E1 of DLC1.





d. Using LEXUS hand-held tester, check the DTC.
1. Hook up the LEXUS hand-held tester to the DLC2.
2. Monitor the ECU data by following the prompts on the tester screen.
Please refer to the LEXUS hand-held tester operator's manual.
LEXUS hand-held tester has a Snapshot function. This records the measured values and is effective in the diagnosis of intermittent problems.
e. Clear the DTC.
The diagnosis memory is erased by turning the ignition switch off.
f. Check the input signal (TEST mode check).
This function check if signals from the steering sensor and stop light switch etc. are being input normally to the ECU.
1. Check the battery positive voltage.
Battery positive voltage: 10 -14 V (When stop the engine)
2. Turn ignition switch off.





3. Connect the LED to terminals TEM and E1 of DLC2.
4. Set each of the check items in the table below to the condition in Operation (A).





5. Using SST 09843-18020, connect between terminals Ts and E1 of DLC1. (TEST mode)
6. Start the engine.
7. Each of the check items is set to the condition in Operation (B).






HINT:
- The LED lights for 1 sec. before it blinks.
- If the operation (B) has not been tone, DTC will indicate.

NOTICE: Do not turn off the ignition switch. Diagnosis code are erased by turning the ignition switch off.






8. Using SST 09843-18020, connect terminals Tc and E1 of DLC2 or DLC1 .





9. Check the number that the LED blinks.

HINT: When the code is normal, the LED come on for 0.25 sec. and goes off for 0.25 sec. repeatedly.






g. Desert from the input signal check mode. With the ignition switch off, disconnect the SST 09843-18020 from the terminals Ts and E1 of DLC2 or DLC1.
2. Fail-safe function.
When the short circuit of the shock absorber control actuator is detected, the shock absorber control actuator located on the other side of the detected shock absorber is held at step 8.
The shock absorber control actuator remains uninterrupted until the ignition switch is OFF.