Security System Does Not Disarm With The Valet Switch

1. Is fuse 3 (in the under-dash fuse 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 - Locate and repair the short.
No - Retest the system.




3. Is there battery voltage at terminal 11 of the security control unit connector, when the ignition switch is in the ON (II) position?

Yes - Go to the next step.
No - Locate the open in the wiring between fuse 3 and the security control unit.




4. Is there approximately 5 volts at terminal 4 of the keyless entry harness connector (B)?

Yes - Go to the next step.
No - Replace the radio.




5. Is there approximately 5 volts at terminal 5 of the security control unit connector?

Yes - Go to the next step.
No - Locate the open in the BLU wire between the security control unit and the radio.




6. Is the voltage at terminal 5 of the security control unit connector changed from approximately 5 volts to 0 volts when the valet switch is pressed?

Yes - Replace the security control unit.
No - Replace the radio.