The following KEY STATUS messages may be shown on the scan tool after commanding
FIRST KEY CODING and KEY ADD:
| • | IGNITION OFF STATUS This message informs the
technician that the ignition is OFF during the key coding process. Turn the ignition
ON during key coding, but do not start the engine. |
| • | KEY IS OCCUPIED Only 5 keys may be coded.
If a new key is desired, the previous key codes must be deleted. Up to 5 keys
may then be authorized. |
| • | ALREADY AUTHORIZED Key coding is being attempted
with a key that is already authorized. |
| • | ERROR NO. A3, A4, A5 There is no communication
between the transponder in the ignition key and the detection coil. Follow the steps
below to diagnose the problem: |
| 1. | Try a different key. If a different key works, the problem was in the
original key. |
| 2. | If trying a different key resulted in the same error message, replace
the detection coil. |
| • | INVALID KEY The communication between the immobilizer
control unit and the key transponder has not validated the key. Follow the steps below
to diagnose the problem: |
| 2. | If the same message is received after key coding, check the connection
of the detection coil. |
| • | NO TRANSPONDER DETECTED The fault may be in
the ignition key transponder, the detection coil, or the immobilizer. Follow the steps
below to diagnose the problem: |
| 1. | Try a different key. If a different key works, the problem was in the
original key. |
| 2. | If trying a different key resulted in the same error message, check the
connection of the detection coil. |
| 3. | If the connection of the detection coil is okay, disconnect the detection
coil and use an ohmmeter to check for an open detection coil. |
