With Manufacturer's Scan Tool
HOW TO READ AND ERASE DIAGNOSTIC TROUBLE CODESCAUTION
1. If battery voltage is low, diagnostic trouble codes may not be output. Be sure to check the battery and charging system before continuing.
2. If the battery is disconnected or if the ECM connector is disconnected, the diagnostic trouble code memory will be erased. Do not disconnect the battery or ECM until after the diagnostic trouble codes are recorded.
3. Turn the ignition switch off before connecting or disconnecting the scan tool.
NOTE: If a DTC is erased, its "freeze frame" data will be also erased and the readiness test status will be reset. If necessary, store the "freeze frame" data before erasing the DTC.
1. Connect the scan tool to the data link connector, and read the diagnostic trouble codes.
2. Repair the malfunction while referring to the INSPECTION CHART FOR DIAGNOSTIC TROUBLE CODES.
3. Turn the ignition switch to OFF and then back to ON again.
4. Erase the diagnostic trouble codes using the scan tool.
5. Check that the diagnostic trouble code is normal.
DIAGNOSTIC BY DIAGNOSTIC TEST MODE II (INCREASED SENSITIVITY)
When mode II is selected using the MUT-II, the service engine soon/malfunction indicator lamp illuminates at the point when the ECM detects a problem (note that this is only for emission related trouble), 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 MUT-II to select mode I once more before mode I 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.