CHECK POWER SUPPLY.

1) Disconnect the keyless entry control module or double lock unit harness connector.

2) Measure the voltage between harness connector terminal and chassis ground.

Connector & terminal

Model without double lock:

(B176) No. 5 (+) — Chassis ground (−):
(B176) No. 16 (+) — Chassis ground (−):

Model with double lock:

(B324) No. 7 (+) — Chassis ground (−):
(B324) No. 8 (+) — Chassis ground (−):

QUESTION
Is the voltage 10 V or more?
Yes	No
	Check the harness for open circuits or shorts between the keyless entry control module or double lock unit and the fuse.