Engine Controls - Bosch ECM Reprogramming
No: TB/O1/00/NASRef:
Issue: 1
Date: 11/10/00
Bosch Engine Management ECM Programming
AFFECTED VEHICLE RANGE:
Range Rover (LP) All with Bosch EMS
Discovery Series II (LT) All with Bosch EMS
ALLDATA Editors Note:
Requires proprietary software. See dealer for information.
SITUATION:
CURRENT ORDER PROCESS FOR PROGRAMMING BOSCH ECM
For the past few months, the procedure for replacing a Bosch Engine Management ECM has been cumbersome. All requests for ECM replacements have been channeled through the Technical HelpLine because local programming of the ECM was not possible.
RESOLUTION:
TESTBOOK PROGRAMMING OF ECM
NOTE:
Proper diagnostics are vital to ensure understanding of the problem. The ECM is probably the least likely component in the system to fail.
With the latest release of TestBook disk DRG0011,the above process is no longer necessary. It is now possible to order ECM's following normal parts ordering procedures and to program them at the Retailer using TestBook.
PARTS INFORMATION
WARRANTY CLAIMS
REPAIR PROCEDURE
DIAGNOSIS AND REPLACEMENT OF BOSCH ECM.
NOTE:
This repair procedure must have prior approval from the Technical HelpLine.
1. Consult with the Technical HelpLine for authorization.
2. Disconnect battery ground cable.
3. Verify ignition switch is in the "O" off position.
4. Remove defective Bosch ECM from the vehicle.
5. Verify that the replacement unit has the same part number as the removed unit.
6. Install new Bosch ECM to vehicle.
7. Connect battery ground cable.
8. Connect TestBook and insert disk DRG0011 or later.
9. Turn ignition switch to "II" position.
10. Select Diagnostics in TestBook.
NOTE:
Selecting "Petrol Engine Diagnostics" (Figure 1) will bring up screen labeled "DDQA0001 PARTCOMMS". TestBook will tell you that "This ECM is in partial comms mode".
11. Select "Petrol Engine Diagnostics".
12. When the message "This ECM is in partial comms mode". Appears, select "PROGRAM" in the bottom corner of the screen.
13. Press "CONTINUE" at next screen labeled "DDQA7100 STARTNODE"
NOTE:
TestBook will now display the VIN numbers stored for the BCU, SRS ECU and ABS ECU.
14. Select "CONTINUE" after ECU VIN display.
CAUTION:
At this point TestBook may come to a "FAILEDINIT" screen. If asked whether you want to replace hardware, always select "NO". If necessary, cycle ignition here as prompted by TestBook. You may have to press "RE-TEST" to regain communications with the Bosch ECM.
15. When asked by TestBook whether you want to replace hardware, ALWAYS select "NO".
NOTE:
During programming, do not interrupt power to the ECM. Programming will take approximately 5 minutes.
16. Establish communications with the Bosch ECM. TestBook will display what tune it is about to download.
17. Press "Continue" to program the ECM.
18. After successfully programming ECM, re-synchronize the security immobilization using TestBook to start the vehicle.