Diagnosis By Diagnostic Test Mode II (Increased Sensitivity)

DIAGNOSTIC BY DIAGNOSTIC TEST MODE II (INCREASED SENSITIVITY)
When mode II is selected using the MUT-II, the check engine/malfunction indicator lamp illuminates at the point when the ECM detects a problem (except if the problem is related to emissions), and at the same time the corresponding diagnostic trouble codes are stored.

Furthermore, in the case of comprehensive component electrical faults (opens/shorts), the time from the occurrence of the fault to the storing of the DTC is compressed (4 seconds -> 1 second).

As a result of this, checking of the trouble symptoms and checking after repairs have been completed are both made easier.
Once mode II has been selected, it is necessary to turn the ignition switch to OFF or to use the Mutely to select mode I once more before mode 1 operation can be resumed. However, all DTCs, readiness test status and freeze frame data will be erased after returning to mode I, so this data should be recorded beforehand if necessary.

(1) Using the scan tool, changeover the diagnostic test mode of the engine control module to DIAGNOSTIC TEST MODE II. (INCREASED SENSITIVITY)
(2) Road test the vehicle.
(3) Read the diagnostic trouble code in the same manner as "READ OUT OF DIAGNOSTIC TROUBLE CODE" and repair the malfunctioning part.
(4) Turn off the ignition switch.

NOTE: Turning OFF the ignition switch will cause the engine control module to changeover the ECM from the diagnostic test mode II to the diagnostic test mode I.