Dtc U0100/56 Lost Communication With Ecm / Pcm A
DESCRIPTION
INSPECTION PROCEDURE
CHECK DTC
DTC U0100/56 Lost Communication with ECM / PCM "A"
DTC U0122/56 Lost Communication with Vehicle Dynamics Control Module
DTC U0126/56 Lost Communication with Steering Angle Sensor Module
DESCRIPTION
The steering control ECU receives signals from the skid control ECU, ECM and steering angle sensor via CAN communication. When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system first.
| DTC Code | DTC Detection Condition | Trouble Area |
| U0100/56 | The steering control ECU detects an error in reception (from ECM) via CAN communication. | CAN communication system
ECM
|
| U0122/56 | The steering control ECU detects an error in reception (from skid control ECU) via CAN communication. | CAN communication system
Skid control ECU
|
| U0126/56 | The steering control ECU detects an error in reception (from steering angle sensor) via CAN communication. | CAN communication system
Steering angle sensor
|
INSPECTION PROCEDURE
Using the intelligent tester, check if the CAN communication system is functioning normally ( for LHD, for RHD).
Result| Result | Proceed to |
| DTC is not output | A |
| DTC is output (for LHD) | B |
| DTC is output (for RHD) | C |
| | GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) ()
|
|
|
| | GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) ()
|
|
|
| A | |
| |
| USE SIMULATION METHOD TO CHECK ()
|
|