Checking the control module
- Ignition on
- Read off the check sum and calculated check sum.
Check that the check sums correspond.
Are the values correct?
- YES
FAULT NOT FOUND: Troubleshooting has been completed.
- NO
Refer to Replacing software
- Ignition on
- Read off the check sum and calculated check sum.
Check that the check sums correspond.
If they do not correspond this indicates an internal fault in the control module.
Are the values correct?
- YES
OKAY: Troubleshooting has been completed.
- NO