How to reprogram a immobilizer on a lexus gs 400 1998?

SOURCE: The immobilizer for my 2001 Audi A3 needs to be reprogramed. How

This will require factory VAG software to complete. Local repair facility may be able to help if not then you will have to go to the dealer.

Posted on Apr 03, 2009

SOURCE: what do I have to

HI!!
Here are some things you should check to find out what the problem is:
1. CHECK TRANSPONDER KEY COIL

• Check transponder key coil. See TRANSPONDER KEY COIL TEST. If transponder key coil is okay, go to next step. Replace transponder key coil if necessary, and retest system operation.

TRANSPONDER KEY COIL TEST Check continuity between terminal No. 1 and No. 2. If continuity does not exist, replace transponder key coil.
2. CHECK CIRCUITS

• Check circuits for faults between transponder key amplifier and ECM. See WIRING DIAGRAMS . If circuits are okay, go to next step. Repair or replace wiring as necessary, and retest system operation.

3. REPLACE TRANSPONDER KEY AMPLIFIER

• Replace transponder key amplifier. Check system operation. If system operates normally after replacing original transponder key amplifier, no further testing is required at this time.
• If system still does not operate normally after replacing original transponder key amplifier, check ECM. See PIN VOLTAGE TESTS . If found to be defective, replace ECM and retest system operation.

PIN VOLTAGE TEST GS300

• Ensure ignition is on. Using a voltmeter, check voltage between ECM connector terminals.
• If voltage is not as specified, repair wire harness or replace components as necessary.
• If voltages are as specified, ECM may be faulty. See VOLTAGE TEST (GS300) table.

VOLTAGE TEST (GS300)
BETWEEN TERMINALS VOLTAGE E16-9 & E13-17 4.5 - 5.5 E16-10 & E13-17 10 - 14 E16-21 & E13-17 10 - 14 E16-22 & E13-17 10 - 14 E16-23 & E13-17 10 - 14
Related problems with vehicles equipped w/engine immobilizer system.

DTC B2797 sets when there is a signal being emitted from key but not being processed by transponder key amplifier. DTC indicates that problem is not w/key, but signal from key is not getting to PCM. Suspect harness, transponder amp or PCM.

Good Luck!! Keep me posted!! A HELPFUL - 4 THUMBS - rating for this solution would be greatly appreciated. Thank you for using FixYa.

Posted on Nov 19, 2010