Security System Does Not Work In Any Mode
Security System Does Not Work In Any Mode1. Is fuse 6 (in the under-dash box) OK ?
Yes - Go to the next step.
No - Replace the blown fuse, then go to the next step.
2. Does the fuse blow again?
Yes - Go to the next step.
No - Retest the system.
3. Disconnect the security control unit connector.
4. Is there continuity from terminals 1,10,12, or 22 to ground?
Yes - Locate the short in the wiring between the security control unit and the keyless door lock control unit.
No - Go to the next step.
5. Is there battery voltage at terminal 10 of the security control unit connector?
Yes - Go to the next step.
No - Locate the open in the wiring between fuse 6 and the security control unit.
6. Is there continuity from terminal 13 of the security control unit connector to ground?
Yes - Replace the security control unit.
No - Locate the open in the wiring between the security control unit and ground (G401).
7. With the security control unit connector reconnected, is there battery voltage at terminal 21 of the security control unit connector?
Yes - Go to the next step.
No - Replace the security control unit.
8. Is there battery voltage at terminal 5 of the keyless entry harness connector (B)?
Yes - Replace the radio.
No - Repair the damaged LT BLU wire between the security control unit and the radio.