CHECK IMM ECM FUNCTION.

Insert the key into the ignition switch (LOCK position), then measure changes in voltage between the antenna connectors.

Connector & terminal

(B142) No. 1 (+) — No. 2 (−):

QUESTION
Is the voltage −30 to 30 V? (Approx. 0.1 second after inserting the key) Is the voltage 0 V? (Approx. 1 second after inserting the key)
Yes	No
	Replace the IMM ECM and then replace all ignition keys (including the transponder). Execute the registration procedure next. Refer to REGISTRATION MANUAL FOR IMMOBILIZER (Pub. No. S0820GZ).