CHECK HARNESS.

1) Turn the ignition switch to ON.

2) Measure the voltage between the body integrated unit harness connector and chassis ground.

Connector & terminal

(B280) No. 1 (+) — Chassis ground (−):

QUESTION

Is the voltage 10 V or more?

Yes No

Replace the body integrated unit.

Repair or replace the harness, fuse and ignition switch.