Diagnosis System

DIAGNOSIS SYSTEM




a. Check the TEM output (LED lightening check).
1. Connect the LED to terminals TEM and CG of the DLC3.

NOTE: 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 the engine stopped)
2. After driving the vehicle, using SST connect terminals Tc and E1 of the DLC1, or terminals Tc and CG of the DLC3.
SST 09843-18020 or 09843-18040

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

NOTE: Wrong connection of the connector may cause a malfunction. With extreme caution, connect the connector.




3. Connect the LED to terminals TEM and CG of DLC3.







4. Check the number that the LED blinks.

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

5. Disconnect the SST from terminals Tc and El of the DLC1, or terminals Tc and CG of the DLC3.
SST 09843-18020 or 09843-18040
Confirm that the connected LED is off.

6. When an abnormal code is output, inspect the function, absorber control ECU and input signal.




c. Check the damping force controlling condition.
1. Using SST, connect terminals Ts and E1 of the DLC1 with the ignition switch OFF (TEST mode).
SST 09843-18020
2. Start the engine.
Under 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 from terminals Ts and E1 of the DLC1.
SST 09843-18020




d. Using LEXUS hand-held tester, check the DTC.
1. Connect the LEXUS hand-held tester to the DLC2.
2. Monitor the ECU data by following the prompts on the tester screen.
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 checks 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 the engine stopped)
2. Turn ignition switch OFF.




3. Connect the LED to terminals TEM and CG of the DLC3.
4. Set each of the check items in the table to the condition of operation (A).




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

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





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




8. Using SST, connect terminals Tc and E1 of the DLC1, or terminals Tc and CG of the DLC3.
SST 09843-18020 or 09843-18040




9. Check the number that the LED blinks.

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




g. Desert from the input signal check mode.
With the ignition switch OFF, disconnect the SST from the DLC1 or DLC3.
SST 09843-18020 or 09843-18040