SI-Drive Mode Indication Does Not Change And Modes Do Not Switch After Switching Si-Drive Modes

Wiring diagram: 

Engine Electrical System Refer to WIRING SYSTEM>ENGINE ELECTRICAL SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK SI-DRIVE SWITCH. 
   1. Turn the ignition switch to OFF.
   2. Disconnect the connector from the combination meter.
   3. Measure the resistance when the SI-DRIVE switch is operated.

      Connector & terminal 

      (i10) No. 31 - Chassis ground:

   Does the resistance change as below?

   S#/I: 1.71 - 1.89 kΩ

   S/I: less than 1 Ω

   Yes:  Go to  5.

   No:  Go to  2.

2. CHECK HARNESS BETWEEN COMBINATION METER AND SI-DRIVE SWITCH CONNECTOR. 

   Measure the resistance of harness between combination meter connector and SI-DRIVE switch connector.

   Connector & terminal 

   (i10) No. 31 - (ST3) No. 8:

   Is the resistance less than 1 Ω?

   Yes:  Go to  3.

   No:  Repair the harness and connector.

   NOTE: In this case, repair the following item:

   • Open circuit in harness between combination meter connector and SI-DRIVE switch connector
   • Poor contact of coupling connector
   • Poor contact of roll connector
   • Roll connector is faulty
3. CHECK HARNESS BETWEEN SI-DRIVE SWITCH CONNECTOR AND CHASSIS GROUND. 

   Measure the resistance of harness between SI-DRIVE switch connector and chassis ground.

   Connector & terminal 

   (ST3) No. 7 - Chassis ground:

   Is the resistance less than 1 Ω?

   Yes:  Go to  4.

   No:  Repair the harness and connector.

   NOTE: In this case, repair the following item:

   • Open circuit in harness between SI-DRIVE switch connector and chassis ground
   • Poor contact of joint connector
   • Poor contact of roll connector
   • Roll connector is faulty
4. CHECK HARNESS BETWEEN COMBINATION METER AND SIDRIVE SWITCH CONNECTOR. 

   Measure the resistance between combination meter connector and chassis ground.

   Connector & terminal 

   (i10) No. 31 - Chassis ground:

   Is the resistance 1 MΩ or more?

   Yes:  Repair the poor contact of SI-DRIVE switch connector. Replace the SI-DRIVE switch if defective. Refer to FUEL INJECTION (FUEL SYSTEMS) (EXCEPT FOR STI)>SI-DRIVE (SUBARU INTELLIGENT DRIVE) SELECTOR .

   No:  Repair the short circuit to ground in harness between combination meter and SI-DRIVE switch connector.

5. CHECK HARNESS BETWEEN COMBINATION METER AND CHASSIS GROUND. 

   Measure the resistance of harness between combination meter and chassis ground.

   Connector & terminal 

   (i10) No. 38 - Chassis ground:

   Is the resistance less than 5 Ω?

   Yes:  Go to  6.

   No:  Repair the open circuit of harness between combination meter and chassis ground.

6. RECHECK FAULT. 
   1. Connect all connectors.
   2. Switch SI-DRIVE modes.

   Is there any fault?

   Yes:  Repair the poor contact of combination meter connector. Replace the meter case assembly if defective. Refer to INSTRUMENTATION/DRIVER INFO>COMBINATION METER .

   No:  The circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

   NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.