Lexus ES: Control Module Communication Bus OFF (U0073,U0126,U0142,U0182)
DESCRIPTION
These DTCs are stored if a CAN communication malfunction occurs between the headlight ECU sub-assembly RH and other ECUs.
for LED Type Turn Signal Light| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | DTC Output from |
|---|---|---|---|---|
| U0073 | Control Module Communication Bus OFF | The headlight ECU sub-assembly RH does not send/receive data. | CAN communication system | AFS (Sub) |
| U0126 | Lost Communication with Steering Angle Sensor Module | The headlight ECU sub-assembly RH does not receive data from the steering sensor for approximately 10 seconds or more. |
| AFS (Sub) |
| U0142 | Lost Communication with Body Control Module "B" | The headlight ECU sub-assembly RH does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more. |
| AFS (Sub) |
| U0182 | Lost Communication With Lighting Control Module Front | The headlight ECU sub-assembly RH does not receive data from the headlight ECU sub-assembly LH for approximately 10 seconds or more. |
| AFS (Sub) |
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | DTC Output from |
|---|---|---|---|---|
| U0073 | Control Module Communication Bus OFF | The headlight ECU sub-assembly RH does not send/receive data. | CAN communication system | HL AutoLeveling (Sub) |
| U0126 | Lost Communication with Steering Angle Sensor Module | The headlight ECU sub-assembly RH does not receive data from the steering sensor for approximately 10 seconds or more. |
| HL AutoLeveling (Sub) |
| U0142 | Lost Communication with Body Control Module "B" | The headlight ECU sub-assembly RH does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more. |
| HL AutoLeveling (Sub) |
| U0182 | Lost Communication With Lighting Control Module Front | The headlight ECU sub-assembly RH does not receive data from the headlight ECU sub-assembly LH for approximately 10 seconds or more. |
| HL AutoLeveling (Sub) |
PROCEDURE
| 1. | CONFIRM MODEL |
(a) Choose the model to be inspected.
| Result | Proceed to |
|---|---|
| for LED Type Turn Signal Light | A |
| for Bulb Type Turn Signal Light | B |
| B |  | GO TO STEP 4 |
|
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| 2. | CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / AFS (Sub) / Trouble Codes.
(e) Clear the DTCs.
Body Electrical > AFS (Sub) > Clear DTCs
|
| 3. | CHECK FOR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Wait 20 seconds or more.
(d) Turn the Techstream on.
(e) Enter the following menus: Body Electrical / AFS (Sub) / Trouble Codes.
(f) Check for DTCs.
Body Electrical > AFS (Sub) > Trouble CodesOK:
DTCs are not output.
| OK | | USE SIMULATION METHOD TO CHECK |
| NG | | GO TO CAN COMMUNICATION SYSTEM |
| 4. | CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / HL AutoLeveling (Sub) / Trouble Codes.
(e) Clear the DTCs.
Body Electrical > HL AutoLeveling (Sub) > Clear DTCs
|
| 5. | CHECK FOR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Wait 35 seconds or more.
(d) Turn the Techstream on.
(e) Enter the following menus: Body Electrical / HL AutoLeveling (Sub) / Trouble Codes.
(f) Check for DTCs.
Body Electrical > HL AutoLeveling (Sub) > Trouble CodesOK:
DTCs are not output.
| OK | | USE SIMULATION METHOD TO CHECK |
| NG | | GO TO CAN COMMUNICATION SYSTEM |
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How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
Use the following procedure to troubleshoot the power mirror control system (w/o Memory).
*: Use the Techstream.
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
NEXT 2. CUSTOMER PROBLEM ANALYSIS HINT:
In troubleshooting, confirm th
Inspection
INSPECTION PROCEDURE 1. INSPECT FUEL PRESSURE SENSOR (FUEL DELIVERY PIPE WITH SENSOR ASSEMBLY LH) NOTICE:
Do not remove the fuel pressure sensor from the fuel delivery pipe with sensor assembly LH.
If the fuel pressure sensor is removed, replace the fuel pressure sensor (fuel delivery pipe with
