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1A-197 Engine General Information and Diagnosis: DTC U0140: Lost Communication with Body Control Module S6JB0B1104083 Wiring Diagram DTC Detecting Condition and Trouble Area 14 DTC check 1) Disconnect connector from steering angle sensor (ESP ® model) with ignition switch turned OFF. 2) Check ECM for DTC. Is there DTC U0121? Go to Step 15. CAN communication 15 DTC check 1) Disconnect connectors from all control modules (ECM, TCM (A/T model), BCM, ABS or ESP ® control module, 4WD control module (if equipped), keyless start control ® model)) with ignition switch turned OFF. 2) Check that CAN communication circuit is as follows. • ALL wire harness resistance of CAN communication circuit is less than 1 Ω between each control module. • Insulation resistance between CAN communication circuit wires is infinity at each control module • Insulation resistance between each CAN communication circuit wire and vehicle body ground is • Circuit voltage of CAN communication circuit is 0 V with ignition switch turned ON. Are they in good condition? Go to Step 16. Repair or replace 16 Warning light check 1) Connect connectors to all control modules communicating by CAN. 2) Turn ignition switch ON. Is ABS or ESP ® warning light light up? Substitute a known- ® control module and Substitute a known- Step Action Yes No DTC detecting condition Trouble area Reception error of communication data for BCM is detected for longer • CAN communication circuit ® control module • TCM (A/T model) ® model) • ECM |