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.
Check Shift Indicator
Diagnosis:
- CAN communication is abnormal with the combination meter.
- Combination meter malfunction
Trouble symptom:
- Shift indicator does not display or remains displayed.
- Shift indicator display does not change.
- CHECK DTC
.
Read the DTC using Subaru Select Monitor. Ref. to TRANSMISSION (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
Is DTC U0155 or U0423 displayed?
Yes : Perform the self-diagnosis of combination meter.
No : Go to 2 .
- CHECK DTC
.
Read the DTC using Subaru Select Monitor. Ref. to TRANSMISSION (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
Are DTCs other than U0155 and U0423 displayed?
Yes : Perform the diagnosis according to the DTC. Ref. to TRANSMISSION (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)>LIST .
No : Go to 3 .
- CHECK COMBINATION METER
.
Read the DTC of [Combination Meter] using the Subaru Select Monitor. Ref. to COMBINATION METER (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
Are any DTCs displayed?
Yes : Perform the diagnosis according to the DTC. Ref. to COMBINATION METER (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST .
No : Go to 4 .
- CHECK TCM
.
- Operate the + side of the paddle shift switch.
- Read the data of [Up Switch] using Subaru Select Monitor. Ref. to TRANSMISSION (DIAGNOSTICS)>DATA MONITOR .
Does it change between ON and OFF according to the operation?
Yes : Go to 5 .
No : Check for poor contact between TCM and paddle shift UP switch, and repair the defective part.
- CHECK TCM
.
- Operate the - side of the paddle shift switch.
- Read the data of [Down Switch] using Subaru Select Monitor. Ref. to TRANSMISSION (DIAGNOSTICS)>DATA MONITOR .
Does it change between ON and OFF according to the operation?
Yes : Go to 6 .
No : Check for poor contact between TCM and paddle shift down switch, and repair the defective part.
- CHECK TCM
.
- Turn the ignition switch OFF, then turn it ON again.
- Shift the select lever to manual mode.
- Read the data of [Shift step in Manu. mode] using Subaru Select Monitor. Ref. to TRANSMISSION (DIAGNOSTICS)>DATA MONITOR .
Is "1" displayed?
Yes : Go to 7 .
No : Perform the diagnosis according to DTC P0951. Ref. to TRANSMISSION (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC P0951: AUTO SHIFT MANUAL CONTROL CIRCUIT RANGE/PERFORMANCE .
- CHECK TCM
.
- Shift up the select lever.
- Read the data of [Shift step in Manu. mode] using Subaru Select Monitor. Ref. to TRANSMISSION (DIAGNOSTICS)>DATA MONITOR .
Is "2" displayed?
Yes : Current condition is normal.
No : Replace the TCM. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>TRANSMISSION CONTROL MODULE (TCM) .
Use the Manual With the Right Hardware
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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.