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ADP-58 < COMPONENT DIAGNOSIS > B2128 UART COMMUNICATION LINE B2128 UART COMMUNICATION LINE Description INFOID:0000000003134668 Driver seat control unit performs UART communication with the automatic drive positioner control unit using 2 DTC Logic INFOID:0000000003134669 DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE 1. RERFORM DTC CONFIRMATION PROCEDURE 1. Turn ignition switch ON. 2. Operate tilt & telescopic switch for more than 2 seconds. 3. Check “Self diagnostic result” with CONSULT-III. Is the DTC detected? YES >> Perform diagnosis procedure. Refer to NO >> INSPECTION END Diagnosis Procedure INFOID:0000000003134670 1. CHECK UART COMMUNICATION LINE CONTINUITY 1. Turn ignition switch OFF. 2. Disconnect driver seat control unit and automatic drive positioner control unit connector. 3. Check continuity between driver seat control unit harness connector and automatic drive positioner con- 4. Check continuity between driver seat control unit harness connector and ground. Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-38, "Intermittent Incident" . NO >> Repair or replace harness. DTC No. Trouble diagnosis name DTC detecting condition Possible cause B2128 UART COMM The communication between driver seat control unit • UART communication line (UART communication line is • Driver seat control unit control unit Driver seat control unit Automatic drive positioner control unit Continuity Connector Terminal Connector Terminal B451 1 M51 10 Existed 17 26 Driver seat control unit Ground Continuity Connector Terminal B451 1 Not existed 17 |