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Home >> Kia >> 2012 >> Optima LX, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 50 (Body Control Module Diagnosis - HEV) >> DTC B1603: CAN Bus Off >> General Information >> DTC Description
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DTC Description

WARNING: This page is about a different variant/trim than selected.

This DTC sets when a communication error between SJB and other control units occur.

(* Control Units: BCM(Body Control Module), CLU(Cluster), SMK(Smart Key), SJB(Smart Junction Box), PSM(Power Seat Module)

Case1: After short between CAN Low Line and High Line, short to ground together.

Case2: After short between CAN Low Line and High Line, short to power together.

This code sets when the module is unable to transmit data on the CAN Line. It may be possible to receive data on the CAN Line.

This code reports "BUS OFF" status when a data transmit error count is over 255. The purpose is to verify the status of CAN controller and CAN communication line when error is detected.

Depending on operation condition, some modules which are connected to the CAN line may not detect B1603. Also, B1602 coincides with B1603 at all times.

CAUTION: Difference between CAN ERROR and CAN BUS ERROR
CAN Error: MIL On, CAN Bus Error: No MIL