Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC Description
B1602 is presented when IC detects one of eight type of errors under normal communication condition.
(1) CAN High Line short to battery
(2) CAN Low Line short to battery
(3) CAN High Line short to ground
(4) CAN Low Line short to ground
(5) CAN High and Low line short to each other
(6) CAN High Line short to 5V power
(7) CAN High Line open
(8) CAN Low Line open
* According to the operation condition, some of the modules which are connected to CAN line may not detect B1602.
Also, B1603 can be detected together.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.