Lexus NX: Control Module Communication Bus "A" Off (U0073,U0100,U0124,U0126,U0129,U0140,U0155,U0164,U0293)
DESCRIPTION
These DTCs are stored if there is a malfunction in the CAN communication system connected to the clearance warning ECU assembly.
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 "A" Off | Control module communication bus off | CAN communication system |
| U0100 | Lost Communication with ECM / PCM "A" | Lost communication with ECM | CAN communication system |
| U0124 | Lost Communication with Lateral Acceleration Sensor Module | Lost communication with airbag ECU assembly | 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 Body Control Module | Lost communication with main body ECU (multiplex network body ECU) | CAN communication system |
| U0155 | Lost Communication With Instrument Panel Cluster (IPC) Control Module | Lost communication with meter circuit plate | CAN communication system |
| U0164 | Lost Communication with HVAC Control Module | Lost communication with air conditioning amplifier assembly | CAN communication system |
| U0293 | Lost Communication with Hybrid Control Module | Lost communication with hybrid vehicle control ECU | CAN communication system |
PROCEDURE
| 1. | CHECK FOR DTC |
(a) Using the Techstream, check for DTCs according to the prompts on the screen.
HINT:
After turning the power switch from off to on (IG), wait 10 seconds or more before checking for DTCs.
Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes(b) Clear the DTCs according to the screen on the Techstream.
Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Clear DTCs(c) Recheck for DTCs.
Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble CodesOK:
DTC U0073, U0100, U0124, U0126, U0129, U0140, U0155, U0164 is not output.
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 caused the problem symptoms and perform the inspection again, even though DTCs were not output when rechecking for DTCs.
| OK | .gif) | USE SIMULATION METHOD TO CHECK |
.gif)
| NG | | GO TO CAN COMMUNICATION SYSTEM |
READ NEXT:
CAN Communication Failure (Message Registry) (U1000)
DESCRIPTION When the clearance warning ECU assembly determines that the CAN communication circuit is malfunctioning during self-diagnosis, DTC U1000 is stored. DTC No. Detection Item DTC Detect
Precaution
PRECAUTION PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL NOTICE: When disconnecting the cable from the negative (-) auxiliary battery terminal, initialize the following systems aft
SEE MORE:
No Response from Steering Lock ECU (B2786)
DESCRIPTION This DTC is stored when LIN communication between the certification ECU (smart key ECU assembly) and steering lock actuator stops for 10 seconds or more. DTC No. Detection Item DTC Detection Condition Trouble Area B2786 No Response from Steering Lock ECU Communication be
Inspection
INSPECTION PROCEDURE 1. CHECK BRAKE CYLINDER AND PISTON (a) Check the cylinder bore and piston for rust or scoring. If necessary, replace the disc brake cylinder and piston. 2. CHECK PAD LINING THICKNESS (a) Using a ruler, measure the pad lining thickness. Standard thickness: 10.0 mm (0.394 in.) Mi
