Check Shift Indicator

WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.

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 SHIFT POSITION INDICATOR LIGHT SETTINGS .
Check the ON/OFF settings of the shift position indicator light from the center information display setting screen.

NOTE:
If the shift position indicator light settings are not displayed on the center information display, go to step 2 .

Is the shift position indicator light set to "OFF"?

Yes : Set the shift position indicator light to "ON".

No : Go to 2.
CHECK DTC .
Read the DTC of [Transmission] using the Subaru Select Monitor. Ref. to TRANSMISSION (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)

Is DTC U0155 or U0423 displayed?

Yes : Check the combination meter. Ref. to COMBINATION METER (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE

No : Go to 3.
CHECK DTC .
Read the DTC of [Transmission] using the Subaru Select Monitor. Ref. to TRANSMISSION (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)

Are DTCs other than DTC U0155, U0423 displayed?

Yes : Perform the diagnosis according to the DTC. Ref. to TRANSMISSION (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST

No : Go to 4.
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 5.
CHECK TCM .
1. Operate the + side of the paddle shift switch.
2. Using the Subaru Select Monitor, read data of [Up Switch] in the [Data Monitor] of [Transmission]. Ref. to TRANSMISSION (DIAGNOSTICS)>DATA MONITOR
Does the display switch between [ON] and [OFF] according to the operation?

Yes : Go to 6.

No : Check for poor contact between TCM and paddle shift UP switch, and repair the defective part.
CHECK TCM .
1. Operate the - side of the paddle shift switch.
2. Using the Subaru Select Monitor, read data of [Down Switch] in the [Data Monitor] of [Transmission]. Ref. to TRANSMISSION (DIAGNOSTICS)>DATA MONITOR
Does the display switch between [ON] and [OFF] according to the operation?

Yes : Go to 7.

No : Check for poor contact between TCM and paddle shift down switch, and repair the defective part.
CHECK TCM .
1. Turn the ignition switch OFF, then turn it ON again.
2. Shift the select lever to manual mode.
3. Using the Subaru Select Monitor, read data of [Shift Step in Manual Mode] in the [Data Monitor] of [Transmission]. Ref. to TRANSMISSION (DIAGNOSTICS)>DATA MONITOR
Is "1" displayed?

Yes : Go to 8.

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 .
1. Shift up the select lever.
2. Using the Subaru Select Monitor, read data of [Shift Step in Manual Mode] in the [Data Monitor] of [Transmission]. Ref. to TRANSMISSION (DIAGNOSTICS)>DATA MONITOR
Is "2" displayed?

Yes : Go to 9.

No : Replace the TCM. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR690)>TRANSMISSION CONTROL MODULE (TCM)
CHECK SHIFT INDICATOR .
Using Subaru Select Monitor, check the [Shift Display] in the [Active Test] of [Combination Meter]. Ref. to COMBINATION METER (DIAGNOSTICS)>ACTIVE TEST

Do the indication on Subaru Select Monitor and the shift indicator indication match?

Yes : Currently, it is normal.

No : Replace the combination meter. Ref. to INSTRUMENTATION/DRIVER INFO>COMBINATION METER