CHECK IMM ECM POWER SUPPLY CIRCUIT.

1) Turn the ignition switch to OFF.

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

Connector & terminal

(B141) No. 3 (+) — Chassis ground (−):

QUESTION
Is the voltage 10 V or more?
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)”.	Check the harness for open or short between IMM ECM and fuse.