Some customers may experience various warning lights, reduced vehicle speed or a no start condition. Technician diagnosis may reveal one or more CAN communication error related DTCs and at least one control module will not communicate with IDSS. This condition was most likely caused by a failed reprogramming attempt of a control module.More ISUZU trouble please check here:ISUZU Trouble Repair

IMPORTANT: DO NOT REPLACE THE CONTROL MODULE.

It is possible to recover a control module after a failed programming attempt. Follow the service procedure below in order to recover a control module after a failed programming attempt or when IDSS cannot communicate with the control module.

SERVICE PROCEDURE

1.Instructions for Control Module Recovery Fully close IDSS.

2.Disconnect the Isuzu E-IDSS interface module connector from the vehicle data link connector (DLC) [if connected].

3.Turn OFF the ignition and wait 1 minute.

4.Connect IDSS to the vehicle DLC and the PC USB port (if not already connected).

5.Turn ON the ignition with the engine OFF.

6.Open IDSS.

7.Choose the correct vehicle information on the IDSS Main screen and then click Submit.

8.Click on Controller Programming from the table of contents.

IMPORTANT: The left IDSS bulb on the ICON toolbar MUST be green at this point indicating IDSS is connected to the vehicle AND is talking to the PC USB port. If it is still red, check that the IDSS interface module is being powered up by making sure the IDSS interface module power LED is red. If it is red, then the PC may not be talking with the USB port and a PC reboot may be necessary.

9.If IDSS automatically goes to a VIN screen under Engine Control Module (ECM) Programming > Software and Calibrations > Replace and Reprogram Controller, go to Step 10. Otherwise, go to Step 18.

10.Enter the correct 17-digit VIN at the VIN enter screen, then click Next.

11.A pop-up message will occur stating the VIN has been changed. Confirm the correct VIN was entered, and then click Yes.

12.Do NOT turn OFF the ignition at the Install New Controller screen. Click NO when asked is the Original Controller installed.

13.Click Reprogram Controller at the Summary of Calibrations screen. Programming should begin.

NOTE:The controller is accepting the download IF the programming dialogue Sending Bytes is incrementing. The Sending Bytes incremental counter normally begins at around 20-30 seconds.

14.When instructed to do so after the programming event has finished, turn OFF the ignition and wait for the counter to finish counting down.

15.Turn ON the ignition with the engine OFF, then clear all DTCs.

16.If this is a new ECM, program the Speedometer Calibration, Fuel Injector Flow Rates and any associated Vehicle Options.

17.Go to Step 24.

18.Navigate to the control module to be reprogrammed, and then choose Software and Calibrations > Replace and Reprogram Controller.

19.Enter the correct 17-digit VIN at the VIN enter screen, then click Next.

20.Do NOT turn OFF the ignition at the Install New Controller screen. Click NO when asked is the Original Controller installed.

NOTE:The controller is accepting the download IF the programming dialogue Sending Bytes is incrementing. The Sending Bytes incremental counter normally begins at around 20-30 seconds.

21.Click Reprogram Controller at the Summary of Calibrations screen. Programming should begin.

22.When instructed to do so after the programming event has finished, turn OFF the ignition and wait for the counter to finish counting down.

23.Turn ON the ignition with the engine OFF and clear all DTCs.

24.Programming is complete.