Communication For Initializing Impossible: Wiring Diagram

CAN communication system. See appropriate SYSTEM WIRING DIAGRAM article.
Vehicle Dynamics Control System. See appropriate SYSTEM WIRING DIAGRAM article.
AT Control System. See appropriate SYSTEM WIRING DIAGRAM article.
Engine electrical system. See appropriate SYSTEM WIRING DIAGRAM article.
Tire Pressure Monitoring System. See appropriate SYSTEM WIRING DIAGRAM article.
SECURITY SYSTEM. See appropriate SYSTEM WIRING DIAGRAM article.

Fig 1: Security System - Wiring Diagram
Courtesy of SUBARU OF AMERICA, INC.

Step	Check	Yes	No
1 CHECK SUBARU SELECT MONITOR. Connect the Subaru Select Monitor to another vehicle. Check communication condition between Subaru Select Monitor and vehicle.	Is communication performed normally?	Go to step 2 .	Subaru Select Monitor unit or diagnosis cable is faulty.
2 CHECK CAN COMMUNICATION CIRCUIT. Perform the communication initialization for the following module, using the Subaru Select Monitor. Airbag CM Transmission CM A/C CM Engine CM Stereo camera	Is the communication possible with all modules? (Except for the modules that are not equipped on the vehicle.)	Go to step 3 .	Check CAN communication circuit. Refer to BUS "A" (MAIN-CAN) .
3 CHECK CAN COMMUNICATION CIRCUIT. Perform the communication initialization for the following module, using the Subaru Select Monitor. Keyless access CM	Is the communication possible with all modules? (Except for the modules that are not equipped on the vehicle.)	Go to step 4 .	Check CAN communication circuit. Refer to BUS "B" (SMART SYSTEM CAN) .
4 CHECK K-LINE. Perform communication between Subaru Select Monitor and all modules. Check continuity between the modules that did not communicate with Subaru Select Monitor. Connector & terminal (B40) No. 7 - (B135) No. 14 (3.6 L model) (B40) No. 7 - (B310) No. 5 (VDC): (B40) No. 7 - (B54) No. 8 (5AT): (B40) No. 7 - (B281) No. 9 (body integrated unit): (B40) No. 7 - (R221) No. 12 (TPMS): (B40) No. 7 - (i188) No. 3 (OP):	Is there continuity?	Go to step 5 .	Repair or replace the open circuit.
5 CHECK K-LINE. Using a tester, check continuity between K-line and chassis ground. Connector & terminal (B40) No. 7 - Chassis ground:	Is there continuity?	Repair or replace the short circuit portion.	Go to step 6 .
6 CHECK K-LINE. Turn the ignition switch to ON. Using a tester, check voltage between K-line and chassis ground. Connector & terminal (B40) No. 7 - Chassis ground:	Is the voltage 5 V or more?	Repair or replace the short circuit portion.	Go to step 7 .
7 CHECK GROUND CIRCUIT. Check continuity of ground circuit. Connector & terminal (B40) No. 4 - Chassis ground: (B40) No. 5 - Chassis ground:	Is there continuity?	Go to step 8 .	Check ECM ground.
8 CHECK POWER SUPPLY CIRCUIT. Turn the ignition switch to ON. Using a tester, measure the voltage of data link connector. Connector & terminal (B40) No. 8 - Chassis ground: (B40) No. 16 - Chassis ground:	Is the voltage 10 V or more?	The vehicle is normal.	Check the power supply circuits to the data link connector.

CAUTION: When replacing the body integrated unit on the model with immobilizer system, be sure to register immobilizer. Refer to "REGISTRATION MANUAL FOR IMMOBILIZER".