Lexus ES: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
-
Before performing troubleshooting for the dynamic radar cruise control system, perform troubleshooting for the pre-collision system.
Click here
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- *: Use the Techstream.
PROCEDURE
| 1. | VEHICLE BROUGHT TO WORKSHOP |
|
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| 2. | PRE-CHECK |
(a) Measure the auxiliary battery voltage with the power switch off.
Standard Voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.
(b) Check the fuses and relays.
(c) Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.
|
| 3. | CHECK FOR DTCs (HEALTH CHECK) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: System Select / Health Check.
(e) Check for DTCs.
(f) Turn the power switch off.
| Result | Proceed to |
|---|---|
| System DTCs other than DTCs related to the dynamic radar cruise control system (Radar Cruise 1) and dynamic radar cruise control system (Radar Cruise 2) are not output. | A |
| System DTCs other than DTCs related to the dynamic radar cruise control system (Radar Cruise 1) and dynamic radar cruise control system (Radar Cruise 2) are output. | B |
| B | .gif) | GO TO DTC CHART |
|
| 4. | CHECK MULTI-INFOMATION DISPLAY |
(a) Check if a warning message is displayed on the multi-information display in the combination meter assembly.
HINT:
If more than one message is displayed, perform each inspection in the order of A, B and C.
| Result | Proceed to |
|---|---|
| "Cruise Control Malfunction Visit Your Dealer" is displayed. | A |
| One of the following warning messages is displayed:
| B |
| No dynamic radar cruise control system warnings are displayed. | C |
| B | | GO TO STEP 7 |
| C | | GO TO STEP 10 |
|
| 5. | CHECK CAN COMMUNICATION SYSTEM* |
(a) Using the Techstream, check that the CAN communication system is functioning normally.
Click here
OK:
CAN communication system is functioning normally.
| NG | | GO TO CAN COMMUNICATION SYSTEM |
|
| 6. | CHECK FOR DTCs* |
(a) Check for DTCs.
Powertrain > Radar Cruise1 > Trouble Codes Powertrain > Radar Cruise2 > Trouble Codes(b) Make a note of any DTCs that are output.
| Result | Proceed to |
|---|---|
| DTCs are not output | A |
| DTCs are output | B |
| B | | GO TO STEP 8 |
|
| 7. | CHECK VEHICLE CONTROL HISTORY* |
(a) Using the Techstream, check for vehicle control history.
Powertrain > Radar Cruise2 > Utility| Tester Display |
|---|
| Vehicle Control History (RoB) |
(b) Record any vehicle control history that is output.
| Result | Proceed to |
|---|---|
| Vehicle control history is not output | A |
| Vehicle control history X2006, X2013, X2015, X2022, X2026 or X2028 is output | B |
| Vehicle control history other than X2006, X2013, X2015, X2022, X2026 or X2028 is output | C |
| A | | GO TO SYMPTOM SIMULATION |
| B | | GO TO VEHICLE CONTROL HISTORY |
| C | | GO TO STEP 9 |
| 8. | RECONFIRM DTCs* |
(a) Clear the DTCs.
Powertrain > Radar Cruise1 > Clear DTCs Powertrain > Radar Cruise2 > Clear DTCs(b) Reproduce the vehicle conditions that were present when the DTCs that were noted were stored.
HINT:
Refer to each corresponding DTC for details on the detection conditions.
Click here
(c) Recheck for DTCs.
Powertrain > Radar Cruise1 > Trouble Codes Powertrain > Radar Cruise2 > Trouble Codes| Result | Proceed to |
|---|---|
| DTCs are not output | A |
| DTCs are output | B |
| A | | GO TO SYMPTOM SIMULATION |
| B | | GO TO DTC CHART |
| 9. | RECONFIRM VEHICLE CONTROL HISTORY* |
(a) Using the Techstream, clear the vehicle control history.
Powertrain > Radar Cruise2 > Utility| Tester Display |
|---|
| Vehicle Control History (RoB) |
(b) Recheck for vehicle control history.
Powertrain > Radar Cruise2 > Utility| Tester Display |
|---|
| Vehicle Control History (RoB) |
| Result | Proceed to |
|---|---|
| Vehicle control history is not output | A |
| Vehicle control history is output | B |
| A | | GO TO SYMPTOM SIMULATION |
| B | | GO TO VEHICLE CONTROL HISTORY |
| 10. | PROBLEM SYMPTOMS TABLE |
HINT:
Refer to Problem Symptoms Table.
Click here
| Result | Proceed to |
|---|---|
| Fault is not listed in Problem Symptoms Table | A |
| Fault is listed in Problem Symptoms Table | B |
| B | | GO TO PROBLEM SYMPTOMS TABLE |
|
| 11. | INSPECT MILLIMETER WAVE RADAR SENSOR ASSEMBLY (BEAM AXIS MISALIGNMENT READING)* |
NOTICE:
Before checking for millimeter wave radar sensor beam axis misalignment, make sure that the radiator grille and front bumper are correctly installed and have not been damaged or modified.
(a) Adjust the reflector height.
Click here
(b) Place the reflector.
Click here
(c) Connect the Techstream to the DLC3.
(d) Turn the power switch on (IG).
(e) Turn the Techstream on.
(f) Enter the following menus: Body Electrical / Front Radar Sensor / Utility / Front Beam Axis Misalignment Reading.
Body Electrical > Front Radar Sensor > Utility| Tester Display |
|---|
| Front Beam Axis Misalignment Reading |
(g) Check the amount of misalignment.
Standard:
| Vertical Direction | -5 to 5 deg. |
| Horizontal Direction | -0.6 to 0.6 deg. |
HINT:
The millimeter wave radar sensor assembly automatically calibrates the beam axis while the vehicle is being driven. The specified values apply to the automatic calibration only and do not apply during manual beam axis calibration of the millimeter wave radar sensor assembly.
| Result | Proceed to |
|---|---|
| The beam axis values are within specification | A |
| The beam axis values are not within specification | B |
| A | | GO TO SYMPTOM SIMULATION |
| B | | ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY |
READ NEXT:
Road Test
ROAD TEST HINT:
The dynamic radar cruise control system has 2 cruise control modes: constant speed control mode and vehicle-to-vehicle distance control mode.
Vehicle-to-vehicle distance control m
Operation Check
OPERATION CHECK INPUT SIGNAL CHECK (a) Connect the Techstream to the DLC3. (b) Check the steering pad switch assembly using the Data List function of the Techstream (cruise control main switch, -SET s
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE NOTICE:
Before replacing the hybrid vehicle control ECU, refer to Registration.
Click here
When replacing the millimeter wave radar sensor assembly, always replace it wi
SEE MORE:
"CHK" message(s) are displayed on the SIGNAL CHECK screen.
DESCRIPTION On the SIGNAL CHECK screen, it is possible to check if the signals sent to the parking assist ECU are normal. Click here HINT:
On the SIGNAL CHECK screen, "OK" (blue) is displayed for items with a normal inspection result or input state.
On the SIGNAL CHECK screen, "CHK" (red) is
Disassembly
DISASSEMBLY CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.
PROCEDURE 1. REMOVE HEADLIGHT ECU SUB-ASSEMBLY Click here 2. REMOVE HEADLIGHT GASKET Click here 3. REMOVE HEADLIGHT RIM (a) Remove the screw.
