Immobilizer-Keyless Control Unit Input Test

Immobilizer-keyless Control Unit Input Test

NOTE: Before testing the immobilizer-keyless control unit, troubleshoot the multiplex integrated control unit first, using B-CAN System Diagnosis Test Mode A and check the No. 19 (20 A) and No. 7 (10 A) fuses in the under-dash fuse/relay box.

1. Remove the steering column covers.
2. Disconnect the 7P connector (A) from the immobilizer-keyless control unit (B).






3. Inspect the connector and socket terminals to be sure they are all making good contact.
- If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
- If the terminals look OK, go to step 4.

4. With the connector still disconnected, make these input tests at the connector.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, go to step 5.






5. Reconnect the connector to the immobilizer-keyless control unit, and make these input tests at the connector.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, the immobilizer-keyless control unit must be faulty; replace it.