Concept of auto active test

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Fig 1: CAN Communication Diagram (Concept Of Auto Active Test)

Courtesy of NISSAN NORTH AMERICA, INC.

IPDM E/R starts the auto active test with the door switch signals transmitted by BCM via CAN communication. Therefore, the CAN communication line between IPDM E/R and BCM is considered normal if the auto active test starts successfully.
The auto active test facilitates troubleshooting if any systems controlled by IPDM E/R cannot be operated.