It will be able to diagnose defects of hazard switch with GDS quickly. GDS can operates actuator forcefully, input/output value monitoring and self diagnosis.

Select model and "BCM".

Select the "SJB" to check.

Select "Current data", if you will check current data of hazard switch. It provides input/output status of SJB.

Disconnect the negative(-) battery terminal.

Remove the heater comtral module.

(Refer to the HA group - "Controller")

Install the heater control module.