Code 77/538 Displayed: System Failed To Recognize WOT Test

Rerun KOER SELF-TEST as follows:

• Start engine
• Activate KOER SELF-TEST
• Observe ID Code 2 (Code 0 with STAR tester)
• Observe Dynamic Response Code 1 (Code 0 with STAR tester)
• Perform brief WOT
• Testing is complete, KOER code output begins

If Code 77/538 is still displayed, replace ECA and rerun QUICK TEST. If Code 77/538 is no longer present, vehicle has passed dynamic response test; service other codes as necessary.