Diagnostic Trouble Code Procedures: Diagnosis

WARNING: This page is about a different car, the 2017 Mitsubishi Mirage. However, it is still accessible from the selected car via links, so may be relevant.

STEP 1. Using scan tool (M.U.T.-III), diagnose the CAN bus line.
CAUTION: To prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).
1. Connect scan tool (M.U.T.-III). Refer to "HOW TO CONNECT THE SCAN TOOL (M.U.T.-III) ."
2. Turn the ignition switch to the "ON" position.
3. Diagnose the CAN bus line.
4. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the CAN bus line found to be normal?
1. YES: Go to Step 2.
2. NO: Repair the CAN bus line (Refer to DIAGNOSIS ).
STEP 2. Using scan tool (M.U.T.-III), read the ETACS diagnostic trouble code.
Check if DTC is stored in the ETACS-ECU.

Q: Is the DTC stored?
1. YES: Diagnose the ETACS-ECU (Refer to DIAGNOSTIC TROUBLE CODE CHART ).
2. NO: Go to Step 3.
STEP 3. Using scan tool (M.U.T.-III), read the MFI diagnostic trouble code.
Check if DTC No. U0141 is stored in engine control module.

Q: Is the DTC stored?
1. YES: Go to Step 4.
2. NO: Go to Step 5.
STEP 4. Recheck for diagnostic trouble code.
Recheck if the DTC is stored.
1. Erase the DTC.
2. Turn the ignition switch to "ON" position.
3. On completion, check that the DTC is not reset.
Q: Is the DTC stored?
1. YES: Replace ETACS-ECU and then go to Step 6.
2. NO: A poor connection, open circuit or other intermittent malfunction is present in the CAN bus lines between the ETACS-ECU and the combination meter (Refer to HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS ).
STEP 5. Recheck for diagnostic trouble code.
Recheck if the DTC is stored.
1. Erase the DTC.
2. Turn the ignition switch to "ON" position.
3. On completion, check that the DTC is not reset.
Q: Is the DTC stored?
1. YES: Replace combination meter and then go to Step 6.
2. NO: A poor connection, open circuit or other intermittent malfunction is present in the CAN bus lines between the ETACS-ECU and the combination meter (Refer to HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS ).
STEP 6. Recheck for diagnostic trouble code.
Recheck if the DTC is stored.
1. Erase the DTC.
2. Turn the ignition switch to "ON" position.
3. On completion, check that the DTC is not reset.
Q: Is the DTC stored?
1. YES: Go to Step 1.
2. NO: The procedure is complete.