Learned Value Read & Save And Write Learned Value (Changed Ecu)
Required Special Tools:
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: M.U.T.-III USB Cable
- MB991910: M.U.T.-III Main Harness A
CAUTION:
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
- After the ignition switch is in "LOCK" (OFF) position, connect scan tool MB991958 to the data link connector.
- Turn the ignition switch to the "ON" position.
- Select "MFI" from System select Screen of scan tool MB991958.
- Select "Special Function" from MFI Screen.
- Select "Timing chain maintenance" from Special Function Screen.
- Select "Learned value Read & Save" from Timing chain maintenance Screen.
- Press "OK" to store the initial learning value file.NOTE: When the initial learning value file is appropriately stored, "Learned value Save Complete" is shown on the screen of the scan tool MB991958.NOTE: Calculating the amount of elongation of the timing chain by the ECM takes the time. Thus, the file cannot be stored for a while after the ECM initialization or replacement.
- Replace the ECM.
- Select "Write learned value (Changed ECU)" from Timing chain maintenance Screen.
- Select the initial learning value file stored during Step 7 to write the initial learning value.NOTE: Use only the initial learning value file stored during Step 7 without using any other files.NOTE: When the initial learning value is appropriately written, "Learned value writing Completed." is shown on the screen of the scan tool MB991958.