CEM Recovery After SWDL Interrupt (RTJ 16414)

DTC

DESCRIPTION

We have received reports where the software download (SWDL) has been interrupted and it is not possible to download the CEM (Central Electronic Module). This can occur with the download of any software package.

SYMPTOM

Software download is interrupted and CEM download failed message may be seen.

The CEM has two processors and if either of them is not in PROG (program) mode the download will not be possible. This condition can occur during any software download. CEM (40) is the low speed processor and CEM (50) is the high speed side. The method described in this TNN will force both processors into PROG mode. The steps must be followed exactly as stated. 

REQUIRED EQUIPMENT

External power supply for the VCT2000.

See below, or use Power supply from an Idle Panasonic Toughbook CF-29

1. Info external power supply. Commercially available power supplies may be used if they meet the following requirements 

   Voltage: 12 Volt DC

   Current: 1 Ampere minimum

   Connector: 

   Outside diameter 5.5 mm (Negative pole)

   Inside diameter 2.1 mm, (Positive pole)

2. How to connect the external power supply to the VCT2000 

When VCT 2000 is properly connected to external power, the Green LED will be illuminated 

RECOVERY METHOD (follow these steps exactly as stated) 

As usual, the key shall be in position 2 anytime vehicle communication is taking place 

1. Log out of VIDA and shut down the VIDA application.
2. Disconnect the battery charger. Disconnect the vehicle battery. VCT 2000 green LED should go out. (If the VCT is not de-powered in this step, the recovery will fail  )
3. Connect an external power supply to the VCT 2000 as described. VCT 2000 green LED should be lit.
4. Reconnect vehicle battery without the charger connected.
5. Start VIDA application and log in.
6. Choose Vehicle Profile tab and select the car from the list of last identified vehicles and press "OK". If the car is not in the list, manually enter the VIN number and press "OK". The VIN number should now be seen in the Windows header (see arrow).

   (The VIN number may not appear because one of the CEM microprocessors is not responding as a result of the SWDL failure. It is important that the VIN is entered manually in this step or the recovery will fail) 

7. Choose the Software tab and purchase CEM reload.
8. Select Advanced and Press "SEND PROG"
9. Choose ECU CEM (40) and read the hardware part number. Choose ECU CEM (50) and read hardware part number. Be aware of which side of the CEM does not respond 40 or 50? (i.e. can the HW p/n be read?).
10. Disconnect the vehicle battery. Make sure the charger is not connected to the battery cables.

    (The vehicle must not have power and the VCT 2000 must be powered with the external power supply during the next step or the recovery attempt will fail) 

11. Send "PROG" command.
12. Reconnect vehicle battery

    (key must be in position "II" before the battery is re-connected) 

13. Choose ECU CEM (40) and read hardware part number. Choose ECU CEM (50) and read hardware part number. If you can read the HW on both CEM 40 and CEM 50 the CEM has been recovered and will be able to be loaded. Proceed to step 14.
    NOTE: If the Hardware cannot be read on either CEM 40 or CEM 50 repeat Steps  10 through  13 until you can read the HW part number on both  CEM 40 and 50. If after several attempts, there is no response on either CEM 40 or CEM 50 the CEM will not be able to be loaded. 
14. Install Battery Charger. Download CEM reload. Answer "No" for CEM replaced. 
15. Download the original software package that was interrupted.