Power Short Inspection (Main-Can)

Wiring diagram: 

CAN communication system Ref. to WIRING SYSTEM (CROSSTREK MODEL (HEV))>CAN COMMUNICATION SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK BETWEEN RELATED LINES AND MAIN WIRING HARNESS  .
   1. Turn the ignition switch to OFF.
   2. Disconnect the steering sensor connector.
   3. Turn the ignition switch to ON.
   4. Using a tester, measure the voltage between the steering sensor connector and chassis ground.

      Connector & terminal 

      (i74) No. 2 (+) - Chassis ground (-):

      (i74) No. 3 (+) - Chassis ground (-):

   Is the voltage 5 V or less?

   Yes  : Currently, it is normal.

   No  : Go to  2.

2. CHECK CONTROL MODULE  .

   With the tester connected, disconnect control module.

   NOTE: Disconnect the central gateway Control Module at the end.

   Connector & terminal 

   (i74) No. 2 (+) - Chassis ground (-):

   (i74) No. 3 (+) - Chassis ground (-):

   Did the voltage change to 5 V or less?

   Yes  : Replace the control module whose voltage has changed. When the value changed at disconnecting the central gateway Control Module. Go to  3.

   No  : Repair or replace the short circuit of the harness between the central gateway Control Module and ECM.

3. CHECK BETWEEN MAIN WIRING HARNESSES  .

   Using a tester, measure the voltage between the central gateway Control Module connector and chassis ground.

   Connector & terminal 

   (i366) No. 7 (+) - Chassis ground (-):

   (i366) No. 22 (+) - Chassis ground (-):

   Is the voltage 5 V or less?

   Yes  : Replace the central gateway Control Module. Ref. to SECURITY AND LOCKS>GATEWAY Control MODULE .

   No  : Repair or replace the short circuit to power supply of harness between ECM and central gateway Control Module.