Diagnostic Procedure

WARNING: This page is about a different car, the 2015 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.

STEP 1. Scan tool CAN bus diagnostics
Using scan tool MB991958, diagnose the CAN bus lines.

Q: Is the check result normal?
1. YES: Go to Step 2.
2. NO: Repair the CAN bus lines. (Refer to TROUBLESHOOTING ).
STEP 2. Scan tool diagnostic trouble code
Check the ASC diagnostic trouble code. (Refer to DIAGNOSTIC TROUBLE CODE TABLE ).

Q: Is the DTC set?
1. YES: Perform the relevant troubleshooting.
2. NO: Go to Step 3.
STEP 3. Scan tool diagnostic trouble code
Check if the ACD diagnostic trouble code No. C123C, C1242 is set. (Refer to DIAGNOSTIC TROUBLE CODE TABLE ).

Q: Is the check result normal?
1. YES: Perform the relevant troubleshooting.
2. NO: Go to Step 4.
STEP 4. Scan tool data list
Check the data list below. (Refer to DATA LIST REFERENCE TABLE ).
- Item No. 26: Yaw rate sensor
- Item No. 29: Lateral G sensor
- Item No. 31: Longitudinal G sensor
Q: Is the check result normal?
1. YES: Go to Step 5.
2. NO: Replace the G and yaw rate sensor. (Refer to G AND YAW RATE SENSOR ). Then go to Step 6.
STEP 5. Check whether the DTC is reset.
Q: Is DTC No. U1428 set?
1. YES: Replace the AWC-ECU. (Refer to AWC-ECU ). Then go to Step 6.
2. NO: Intermittent malfunction. (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
STEP 6. Check whether the DTC is reset.
Q: Is DTC No. U1428 set?
1. YES: Return to Step 1.
2. NO: This diagnosis is complete.