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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Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST NOTICE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not. HINT: Using the Techstream to read the Data List allows the values or states of
Installation
INSTALLATION PROCEDURE 1. INSTALL TURN SIGNAL SWITCH (a) Engage the claw as shown in the illustration. Install in this Direction (b) Install the turn signal switch with the 2 screws. 2. INSTALL UPPER STEERING COLUMN COVER Click here 3. INSTALL LOWER STEERING COLUMN COVER SUB-ASSEMBLY Cli
