Ignition Systems - Failed Ignition Key Programming

NO: 36-45
DATE: 7-16-2004
MODEL: S/V40 MY2000-2004; S/V70 MY1999-2000; C70 MY1999-2004
SUBJECT: Failed Ignition Key Programming
REFERENCE: VADIS

DESCRIPTION:

Cases are reported that new correctly cut spare part ignition keys can't be programmed to the immobilizer ECU. VADIS may indicate that one or more DTC's are present related to the failed programming.

The most frequent cause of failed ignition key programming is that the immobilizer ECU memory has reached its maximum capacity. The memory of the immobilizer can be cleared by disconnecting the battery negative lead for at least one minute.

This TNN provides some guidelines on the programming of ignition keys with an integrated transponder for the S/V40 MY2000-2004, S/V70 MY1999-2000 and C70 MY1999-2004. These vehicles have a similar immobilizer system and ignition key with integrated transponder.

SERVICE:

Establish the correct vehicle profile, and order the ignition key application software according to the established routine in VADIS.

Obtain radio code.

Disconnect the battery negative lead as described in VADIS Information Manager, Function Group 3, for at least one minute.

Complete the procedure by reconnecting the battery negative lead, downloading the software and programming the key.

Additional tips on ignition key programming

^ If you plan to program more than one key and one of the keys fails, perform the battery reset procedure as mentioned above and try to program the key again.

^ To avoid interference, no other ignition key should be near the ignition key being programmed.





^ It's not necessary to replace the keys when an immobilizer antenna ring is replaced. The spare part keys can be recognized as below:

^ The key for X40 MY03- has the transponder and remote built into the same housing. It is called KIR (Key Integrated Remote).

^ The key blade from an X40 MY03- KIR does not need to be replaced if the remote or transponder is faulty.

Method to replace the key blade:





Logon to VADIS as usual and profile the car using the complete VIN and then proceed with the following steps in the VADIS information manager:

1. Select: Function Group 3

2. Select: Repair and installation instructions Removal, replacement and installation

3. Select: 36 Other electrical equipment --> Ignition key/remote control --> Ignition key/remote control, replacing