U1121
DTC U1121: Lost Communication with ABS / Electronic Stability Program Hydraulic Unit / Control ModuleWiring Diagram
Refer to DTC U1073: Control Module Communication Bus Off:Motor-Shift Type (Transfer with Shift Actuator). U1073
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
1) Clear DTC using scan tool.
2) Start engine and run it for 1 min. or more.
3) Stop vehicle and check DTC.
Troubleshooting