ELECTRICAL 28 Sr No DTC No Code Description Probable causes Rectification/Repair actions 15 U0155 - 08 Lost Communication With Instrument Panel Cluster (IPC) Control Module - Bus Signal / Message Failures 1) No Communication with IPC system. 1) Check IPC ECU connector is properly connected, if ECU connector does not connect connect the connector to ECU. 2) Check resistance between CAN lines (should be Approx. ~60 ohm). if measured resistance is approximately equal to 120 ohm then IPC is disconnected form the Network. Connect the ECU to network. 3. Check IPC ECU power supply line and ground line connection from wiring harness. If any problem repair the wiring line. After fixing the issues check by Diagnostic Tool whether DTC is present in current state or not. 16 U0028 - 13 Vehicle Communication Bus A - circuit open 1) Vehicle Wiring harness fault on CAN Bus harness: open circuit failure for CANH or CANL lines. 1) Check continuity between EPAS ECU connector pin (vehicle signal connector pin no 1 for CANL and pin no for 3 CANH) & vehicle CAN Bus. If continuity is not between ECU and vehicle CAN bus than repair the wiring harness / connectors / wires / connectors terminals. After fixing the issues check by Diagnostic Tool whether DTC is present in current state or not. 17 U0028 - 88 Vehicle Communication Bus A - bus off Short circuit between: 1) CAN H - CAN L wires in vehicle 2) CAN H - Gnd wires in vehicle 3) CAN L - Vbatt wires in vehicle 4) CAN H - Vbatt. wires in vehicle 1) Vehicle wiring harness have a issue, repair / replace vehicle wiring harness. 2) measure resistance between CAN H and CAN L lines ( typical ~60 ohm) .if resistance is less than 10 ohm then short circuit between CAN lines (CANH - CANL / CANH - Gnd / CANL - Vbatt / CANH -Vbatt )is present. Repair the short circuit in wiring harness. When this DTC is present than Diagnostic Tool will not be able to communicate with any ECU and All telltale/LED of IPC will glow. . After fixing the issues check by Diagnostic Tool whether DTC is present in current state or not.
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