LIGHTING (EXT): LIGHTING SYSTEM: U0101,U0073,U0100,U0126,U0129,U0130,U0142,U0163,U0182,U1000,U1121: Lost
Communication with ECM
U1121 - Lost Communication with Driver Seat Module
DESCRIPTION
The DTCs are stored when the CAN communication system is malfunctioning.
INSPECTION PROCEDURE
PROCEDURE
1. CHECK FOR DTC
(a) Clear the DTCs See: Lighting and Horns/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes.
(b) Check for DTCs See: Lighting and Horns/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes.
OK:
DTCs are not output.
NG -- GO TO CAN COMMUNICATION SYSTEM See: Powertrain Management/Computers and Control Systems/Information
Bus/Testing and Inspection/Initial Inspection and Diagnostic Overview/CAN Communication System/How to Proceed With
Troubleshooting
OK -- USE SIMULATION METHOD TO CHECK See: Accessories and Optional Equipment/Antitheft and Alarm
Systems/Diagrams/Diagnostic Aids/How To Troubleshoot ECU Controlled Systems/How To Proceed With Troubleshooting
Up to 08/2009
PRE-COLLISION: PRE-COLLISION SYSTEM: U0122,U0123,U0126,U0140,U0151,U1100: Lost Communication with Vehicle Dynamics
Control Module
U1100 - Lost Communication with Seat Belt Control ECU
DESCRIPTION
The driving support ECU uses the millimeter wave radar sensor to detect obstacles in front of the vehicle.
Based on this information, the driving support ECU sends pre-collision control operation signals.
These DTCs are stored when a communication malfunction occurs between the sensors and ECUs that detect collisions, or between ECUs that
perform the pre-collision control.
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