Engine Block Heater (If Equipped) Inspection

Check continuity between terminal "a" and "c". If there is no continuity, replace it.
Check that there is no continuity between terminal "a" or "b" and "c". If there is continuity, replace it.
Check continuity between terminal "c" and engine block heater body. If there is no continuity, replace it.

Fig 1: Checking Engine Block Heater
Courtesy of SUZUKI OF AMERICA CORP.