Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Test KK - Dynamic Response Test
To prevent replacement of good components, be aware that the following non-EEC related areas may be at fault: person testing EEC-IV system did not perform brief wide open throttle (WOT) after Dynamic Response code, mechanical engine problems, or engine did not go over 2000 RPM.
Code 77 Displayed. Repeat ENGINE RUNNING SELF-TEST. With SELF-TEST activated, restart engine. Code 2 (20 on STAR tester) indicates start of test. After Dynamic Response code 1 (10 on STAR tester) is displayed, perform brief WOT. Dynamic Response service codes will be displayed. If code 77 is still present, replace ECA and repeat QUICK TEST . If code 77 is not displayed, DYNAMIC RESPONSE TEST passed. Service other codes (if displayed) as required.
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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