CVT Model

DTC detecting condition: 

Detected when two consecutive driving cycles with fault occur.

Trouble symptom: 

Improper idling

Wiring diagram: 

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

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK SELECT CABLE. 

   Check the select cable.

   Is there any fault in select cable?

   Yes:  Repair or adjust the select cable. Refer to CONTROL SYSTEMS>SELECT CABLE .

   No:  Go to  2.

2. CHECK INPUT SIGNAL OF ECM. 
   1. Turn the ignition switch to ON.
   2. Place the select lever in other than "P" range and "N" range.
   3. Measure the voltage between ECM connector and chassis ground.

      Connector & terminal 

      (B134) No. 33 (+) - Chassis ground (-):

   Is the voltage 10 V or more?

   Yes:  Repair the poor contact of ECM connector.

   No:  Go to  3.

3. CHECK HARNESS BETWEEN ECM AND TRANSMISSION HARNESS CONNECTOR. 
   1. Turn the ignition switch to OFF.
   2. Disconnect the connector from ECM.
   3. Disconnect the connector from the transmission harness connector (T3).
   4. Measure the resistance between ECM connector and chassis ground.

      Connector & terminal 

      (B134) No. 33 - Chassis ground:

   Is the resistance 1 MΩ or more?

   Yes:  Go to  4.

   No:  Repair the short circuit to ground in harness between ECM connector and transmission harness connector.

4. CHECK TRANSMISSION HARNESS CONNECTOR. 
   1. Disconnect the connector from inhibitor switch.
   2. Measure the resistance between transmission harness connector and engine ground.

      Connector & terminal 

      (T3) No. 12 - Engine ground:

   Is the resistance 1 MΩ or more?

   Yes:  Replace the inhibitor switch. Refer to CONTINUOUSLY VARIABLE TRANSMISSION (TR690)>INHIBITOR SWITCH .

   No:  Repair short circuit to ground in harness between transmission harness connector and inhibitor switch connector.