Lexus NX: Control Module Communication Bus Off (U0073,U0100,U0126,U0129,U0140,U0163,U0233,U0265-U0268,U1110)
DESCRIPTION
These DTCs are stored if there is a malfunction in the CAN communication system connected to the parking assist ECU.
HINT:
If CAN communication system DTCs are stored, they may also be stored in other systems.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| U0073 | Control Module Communication Bus Off | Control module communication bus off | CAN communication system |
| U0100 | Lost Communication with ECM / PCM "A" | Lost communication with hybrid vehicle control ECU | CAN communication system |
| U0126 | Lost Communication with Steering Angle Sensor Module | Lost communication with steering sensor | CAN communication system |
| U0129 | Lost Communication with Brake System Control Module | Lost communication with brake booster with master cylinder assembly (skid control ECU) | CAN communication system |
| U0140 | Lost Communication with Main Body ECU | Lost communication with main body ECU (multiplex network body ECU) | CAN communication system |
| U0163 | Lost Communication with Navigation Control Module | Lost Communication With Radio receiver assembly | CAN communication system |
| U0233 | Lost Communication with Blind Spot Monitor Master Module | Lost Communication with Blind spot monitor sensor LH | CAN communication system |
| U0265 | Lost Communication with Image Processing Sensor A | Lost Communication with rear television camera assembly | CAN communication system |
| U0266 | Lost Communication with Image Processing Sensor B | Lost Communication with side television camera assembly LH | CAN communication system |
| U0267 | Lost Communication with Image Processing Sensor C | Lost Communication with front television camera assembly | CAN communication system |
| U0268 | Lost Communication with Image Processing Sensor D | Lost Communication with side television camera assembly RH | CAN communication system |
| U1110 | Lost Communication with Clearance Warning ECU | Lost communication with clearance warning ECU assembly | CAN communication system |
PROCEDURE
| 1. | CHECK FOR DTC |
(a) Clear the DTCs.
Click here .gif)
(b) Check for DTCs.
Click here
| Result | Proceed to |
|---|---|
| DTC U0073, U0100, U0126, U0129, U0140, U0163, U0233, U0265, U0266, U0267, U0268 and U1110 are not output | A |
| DTC U0073, U0100, U0126, U0129, U0140, U0163, U0233, U0265, U0266, U0267, U0268 and/or U1110 are output | B |
HINT:
- If CAN communication system DTCs are stored, they may also be stored in other systems.
- If the CAN communication system has been inspected and repaired in other systems, the DTCs will not be output when rechecking for DTCs.
-
If these DTCs are output frequently, duplicate the conditions that cause the problem symptoms and perform the inspection again, even though the DTC was not output when rechecking for DTCs.
Click here
| A | .gif) | USE SIMULATION METHOD TO CHECK |
| B | | GO TO CAN COMMUNICATION SYSTEM |
READ NEXT:
CAN Communication Failure (Message Registry) (U1000)
DESCRIPTION If DTC U1000 is stored frequently, duplicate the problem symptoms and perform the inspection again even if the DTC is not output when rechecking for DTCs. DTC No. Detection Item DTC
"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
ECU Power Source Circuit
DESCRIPTION This circuit is the power source circuit to operate the parking assist ECU. The parking assist ECU controls the panoramic view monitor system. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTIC
SEE MORE:
Components
COMPONENTS ILLUSTRATION -
*A w/ Damper - - *1 SUSPENSION TOWER DAMPER - - N*m (kgf*cm, ft.*lbf): Specified torque - - ILLUSTRATION w/ Damper
*A w/o Damper - - *1 SUSPENSION TOWER DAMPER - - N*m (kgf*cm, ft.*lbf): Specified torque - -
Installation
INSTALLATION CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH and LH sides.
The following procedure is for the LH side.
NOTICE: When the brake pedal is first depressed after replacing the brake pads or pushing back the disc brake piston, DTC C1214 may be output. As there is no
