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1A-193 Engine General Information and Diagnosis: 12 DTC check 1) Disconnect connector from 4WD control module (if equipped) with ignition switch turned OFF. 2) Check ECM for DTC. Is there DTC U0101? Go to Step 13. CAN communication 13 DTC check 1) Disconnect connector from steering angle sensor (ESP ® model) with ignition switch turned OFF. 2) Check ECM for DTC. Is there DTC U0101? Go to Step 14. CAN communication 14 DTC check 1) Disconnect connectors from all control modules (ECM, TCM, BCM, ABS or ESP ® control module, 4WD control module (if equipped), keyless start control module (if ® 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 15. Repair or replace 15 DTC check in BCM 1) Connect connectors to all control modules communicating by CAN with ignition switch turned OFF. 2) Check DTC U1101 in BCM. Is it indicated? Check TCM power and Substitute a known- Step Action Yes No |