Engine Controls - Entering VIN After PCM Replacement
ENGINEEG012-04
REVISED
October 14, 2004
Title:
ENTERING VIN DURING ECM (PCM) REPLACEMENT AND/OR DTC P0630
Models:
All '04 - '06 Models
TSIB REVISION NOTICE:
June 3, 2005: Content has been updated to include 2004 and 2006 model year vehicles. Step 4 of the VIN Write Procedure and step 3 of the VIN Read Procedure have been clarified to include RX 400h vehicles.
Previous versions of this TSB should be discarded.
Introduction
All 2005 and subsequent model year Lexus vehicles have the VIN (Vehicle Identification Number) stored in the Electronic Control Module (ECM) (SAE term: Powertrain Control Module/PCM) non-volatile memory. The VIN is accessible on the data stream using the Lexus Diagnostic Tester and can also be written to a new ECM (PCM) using a VIN Read/Write" utility.
Service ECMs (supply parts) are shipped without the VIN; therefore, as part of the ECM (PCM) replacement procedure, the VIN must be written to the replacement ECM (PCM) using the Diagnostic Tester utility function. Failure to write the VIN to the ECM (PCM) will result in a M.I.L. "ON" condition and set DTC P0630: VIN Not Programmed or Mismatch - ECM (PCM).
It is very important to remember to enter the VIN on these vehicles. Vehicles with missing VINs are subject to failing some state and local vehicle emissions Inspection and Maintenance programs.
NOTE:
2004 model year vehicles which have been flash reprogrammed may contain updated 2005 model year OBD II logic. These vehicles will require VIN entry into the ECM (PCM) after reprogramming.
Applicable Vehicles
^ 2004 model year vehicles that have been flash reprogrammed.
^ All 2005 - 2006 model year vehicles.
Warranty Information
Required SSTs
NOTE:
Additional Diagnostic Tester Kits, CAN Interface Modules, Program Cards, or other SSTs may be ordered by calling SPX-OTC at 1-800-933-8335.
VIN Write Procedure
To write a VIN to a replacement ECM (PCM), use the following process:
1. Confirm the VIN. It is located on the front left of the instrument panel.
2. Connect the Diagnostic Tester to DLC3.
3. Turn the ignition switch and Diagnostic Tester switch ON.
4. All vehicles except RX 400h:
Select from the Diagnostic Tester menus: DIAGNOSIS, ENHANCED OBDII, VIN, and VIN WRITE.
RX 400h vehicles:
Select from the Diagnostic Tester menus: DIAGNOSIS, OBD/MOBD, HV ECU, VIN, and VIN WRITE.
5. Write the VIN in accordance with the Diagnostic Tester display.
6. Compare the VIN displayed on the Diagnostic Tester with the VIN on the instrument panel. If these are not the same, write the VIN again after turning the ignition switch OFF.
VIN Read Procedure
1. Connect the Diagnostic Tester to DLC3.
2. Turn the ignition switch and Diagnostic Tester switch ON.
3. All vehicles except RX 400h:
Select from the Diagnostic Tester menus: DIAGNOSIS, ENHANCED OBDII, VIN, and VIN READ.
RX 400h vehicles:
Select from the Diagnostic Tester menus: DIAGNOSIS, OBD/MOBD, HV ECU, VIN, and VIN READ.
4. Check the VIN displayed on the Diagnostic Tester.
HINT:
For further explanations, refer to the Technical Information System (TIS), appropriate model repair manual: Diagnostics: SFI System: Registration.