After replacing the ECM or adjusting intake valve timing confirm that the DTC output does not recur
Total OBD & ECU Auto Diagnostics
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(e) Switch the ECM from normal mode to check mode using the tester (See page ES-41).
(f) Start the engine and warm it up.
(g) Allow the engine to idle for 1 minute or more, and then drive the vehicle for 1 minute or more.
(h) Confirm that no DTC is set using the tester. OK:
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