Engine Controls - Entering VIN When Replacing ECM

ENGINE
EG045-04
REVISED

Title:
ENTERING VIN DURING ECM (PCM)
REPLACEMENT AND/OR DTC P0630

Models:
All '05 Models

October 14, 2004

TSB REVISION NOTICE:
January 24, 2005: Step 4 has been clarified to include Prius vehicles.
The previous TSB should be discarded.

Introduction

All 2005 and subsequent model year Toyota and Scion 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 Toyota 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.

For most 2005 model year vehicles, 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). The five models listed below do not support DTC P0630.

^ Scion XA

^ Scion xB

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.

Applicable Vehicles

All 2005 model year vehicles.





Warranty Information





Required SSTs

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 Prius:
Select from the Diagnostic Tester menus: DIAGNOSIS, ENHANCED OBDII, VIN and VIN WRITE.

Prius 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. Select from the Diagnostic Tester menus: DIAGNOSIS, ENHANCED OBDII, 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: SF1 System: Registration.