Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2022 Subaru Ascent BaseFACTORY OEM SERVICE PROCEDURE
Multi-Function Display (Diagnostics)
- Basic Diagnostic Procedure
- Check List for Interview
- General Description
- Electrical Component Location
- Control Module I/O Signal
- Inspection Mode
- Diagnostic Procedure for Subaru Select Monitor Communication
- Data Monitor
- Freeze Frame Data
- Active Test
- Customize
- Diagnostic Trouble Code (DTC)
- Diagnostic Procedure with Diagnostic Trouble Code (DTC)
- DTC B2225: MFD Internal Communication
- DTC B2226: MFD Internal Circuit
- DTC B2227: MFD Video Microcomputer
- DTC B2228: MFD SDRAM
- DTC B2229: MFD Flash Memory
- DTC B2230: MFD Led
- DTC B2233: Front Camera Circuit Open
- DTC U0074: Control Module Communication Bus "Body-Can" Off
- DTC U0100: Lost Communication With ECM/Pcm "A"
- DTC U0101: Lost Communication With TCM
- DTC U0122: Lost Communication With Vehicle Dynamics Control Module
- DTC U0128: Lost Communication With Park Brake Control Module
- DTC U0131: Lost Communication With Power Steering Control Module
- DTC U0140: Lost Communication With Body Control Module
- DTC U0151: Lost Communication With Restraints Control Module
- DTC U0155: Lost Communication With Instrument Panel Cluster (IPC) Control Module
- DTC U0162: Lost Communication With Audio Visual Navigation Display Module
- DTC U0164: Lost Communication With HVAC Control Module
- DTC U0167: Lost Communication With Immobilizer Control Module
- DTC U0327: Software Incompatibility With Vehicle Security Control Module
- DTC U0401: Invalid Data Received From ECM/Pcm "A"
- DTC U0402: Invalid Data Received From TCM
- DTC U0416: Invalid Data Received From Vehicle Dynamics Control Module
- DTC U0417: Invalid Data Received From Park Brake Control Module
- DTC U0420: Invalid Data Received From Power Steering Control Module
- DTC U0422: Invalid Data Received From Body Control Module
- DTC U0423: Invalid Data Received From Instrument Panel Cluster Control Module
- DTC U0424: Invalid Data Received From HVAC Control Module
- DTC U0426: Invalid Data Received From Immobilizer Control Module
- DTC U0427: Invalid Data Received From Vehicle Security Control Module
- DTC U0452: Invalid Data Received From Restraints Control Module
- DTC U0463: Invalid Data Received From Navigation Display Module
- DTC U1120: Lost Communication With AUTOSTART Stop Control Module
- DTC U1198: Lost Communication With Telematics System
- DTC U1232: Lost Communication With Rear/Side Radar Control Module
- DTC U1235: Lost Communication With Eyesight
- DTC U1433: Invalid Data Received From Eyesight
- DTC U1469: Invalid Data Received From AUTOSTART Stop Control Module
- DTC U1499: Invalid Data Received From Telematics System
- DTC U1533: Invalid Data Received From Rear/Side Radar Control Module
- Diagnostics with Phenomenon
- List
- Inspection
- No Display Is Shown
- Light Auto Display Is Not Displayed In The Advanced Equipment Screen
- Eyesight Main Display Is Not Displayed In The Advanced Equipment Screen
- RAB On/Off Display Cannot Be Switched In The Advanced Equipment Screen
- Blind Spot Detection/Rear Cross Traffic Alert On/Off Display Cannot Be Switched In The Advanced Equipment Screen
- Only Weather Screen Is Not Displayed
- Only Orientation & And Turn By Turn Screens Are Not Displayed
- Pressing The Up, Down Or Enter/View Switch Does Not Change The Screen
- Average Fuel Economy Is Not Displayed
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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