Faster/Slower Vehicle Speed Than The Actual Speed Is Displayed

Trouble causes  :

• CAN communication failure
• Vehicle speed sensor malfunction
• Combination meter malfunction

1. BASIC INSPECTION  .

   Before performing the diagnosis, perform basic inspection. Ref. to COMBINATION METER (DIAGNOSTICS)>GENERAL DESCRIPTION>INSPECTION .

   NOTE:

   • Check the battery and its installation condition.
   • Check the related fuse.
   • Visually check that the related connectors are properly connected.

     Also, check the related ground terminal for looseness and corrosion.

   Is the check result OK?

   Yes  : GO TO  2.

   No  : Repair the defective part.

2. CHECK THE ACTUAL VEHICLE SPEED  .

   Check that the vehicle speed indicated in the meter matches with the actual vehicle speed.

   Does the vehicle speed match?

   Yes  : GO TO  5.

   No  : GO TO  3.

3. CHECK DTC  .

   Read the DTC of [Combination Meter] using the Subaru Select Monitor. Ref. to COMBINATION METER (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

   Is DTC U0122 displayed? (Current code)

   Yes  : Perform the diagnosis according to the basic diagnostic procedure in LAN SYSTEM (DIAGNOSTICS). Ref. to LAN SYSTEM (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE .

   After the repair, GO TO  5.

   No  : GO TO  4.

4. CHECK SPEEDOMETER  .

   Using the Subaru Select Monitor, check the following items in the [Active Test] of [Combination Meter]. Ref. to COMBINATION METER (DIAGNOSTICS)>ACTIVE TEST .

   • Speedometer

   Do the indicated vehicle speed on Subaru Select Monitor and the speedometer indication match?

   Yes  : Perform a unit inspection for the vehicle speed sensor. Ref. to VEHICLE DYNAMICS CONTROL (VDC)>FRONT ABS WHEEL SPEED SENSOR>INSPECTION . Ref. to VEHICLE DYNAMICS CONTROL (VDC)>REAR ABS WHEEL SPEED SENSOR>INSPECTION .

   After the repair, GO TO  5.

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

   After replacement, GO TO  5.

5. CHECK REPAIR  .

   Perform operation check to check if the trouble has been solved.

   Is the check result OK?

   Yes  : Finish the diagnosis.

   No  : Perform the diagnosis according to the basic diagnostic procedure. Ref. to COMBINATION METER (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .