Multiplex Communication System

If a malfunction code is displayed during the DTC check, check the circuit listed for that code.

If a malfunction code is displayed during the DTC check, check the circuit listed for that code.

HINT DTC 21 - 26 don't mean switch abnormal but notify how switch works.
If DTC is not output when operating switch, it means failure of switch contact.
If DTC is output when not opening switch, it means stick of switch.