55 Ω Or Less: Wiring Diagram

CAN communication system. See appropriate SYSTEM WIRING DIAGRAM article.

Fig 1: CAN Communication System - Wiring Diagram

Courtesy of SUBARU OF AMERICA, INC.

NOTE: When the bus line is measured, combined resistance of end resistance (120 Ω) in ECM and end resistance (120 Ω) in VDC CM can be measured. The combined resistance is approximately 56 - 64 Ω. When the measured resistance value is 55 Ω or less, main wiring harness or related lines may be shorted, or combined resistance may have changed because resistance other than end resistance is created on the circuit.

Step	Check	Yes	No
1 CHECK BETWEEN RELATED LINES AND MAIN WIRING HARNESS. Using the tester, measure the resistance between terminals. Connector & terminal (B40) No. 6 - No. 14:	Is the resistance 10 Ω or less?	Go to step 2 .	Go to step 4 .
2 CHECK MAIN WIRING HARNESS AND RELATED LINES. With a tester connected, disconnect control module connectors in order. NOTE: Disconnect the body integrated unit at the end. Connector & terminal (B40) No. 6 - No. 14:	Is there any control module whose condition has changed from short state?	Replace the control module whose resistance has changed. When the value changed at disconnecting the body integrated unit, Go to step 3 .	Repair or replace the short circuit of the main wiring harness and related lines between body integrated unit and VDC CM.
3 CHECK BETWEEN MAIN WIRING HARNESSES. Using the tester, measure the resistance between terminals. Connector & terminal (i84) No. 27 - No. 35:	Is the resistance 10 Ω or less?	Repair or replace the short circuit of the main wiring harness and related lines between body integrated unit and ECM.	Replace the body integrated unit. Refer to REMOVAL .
4 CHECK CONTROL MODULE. Disconnect ECM and VDC CM connectors. Using a tester, measure the resistance between control module terminals. Connector & terminal (B137) No. 19 - No. 18 (2.5 L model): (B136) No. 17 - No. 28 (3.6 L model): (B310) No. 8 - No. 10:	Is the resistance 115 - 135 Ω?	Go to step 5 .	Replace the control module whose end resistance value is out of the specified range.
5 CHECK CONTROL MODULE. Disconnect the connector of body integrated unit. Using a tester, measure the resistance between control module terminals. Connector & terminal (i84) No. 27 - (B281) No. 28: (i84) No. 35 - (B281) No. 20:	Is the resistance 2, 850 - 3, 150 Ω?	Go to step 6 .	Replace the body integrated unit. Refer to REMOVAL .
6 CHECK CONTROL MODULE. Using a tester, measure the resistance between control module terminals. Connector & terminal (i84) No. 35 - (B281) No. 28: (i84) No. 27 - (B281) No. 20:	Is the resistance less than 1 Ω?	Go to step 7 .	Replace the body integrated unit. Refer to REMOVAL .
7 CHECK CONTROL MODULE. Disconnect the connector of combination meter. Using the tester, measure the resistance between terminals. Connector & terminal (i10) No. 33 - No. 32:	Is the resistance 2, 850 - 3, 150 Ω?	Go to step 8 .	Replace the combination meter.
8 CHECK CONTROL MODULE. Disconnect the security CM connector. Using a tester, measure the resistance between control module terminals. Connector & terminal (B40) No. 6 - No. 14:	Is the resistance 1, 425 - 1, 575 Ω?	Go to step 9 .	Replace the security CM.
9 CHECK HARNESS. Using the tester, measure the resistance between terminals. Connector & terminal (B281) No. 28 - No. 20:	Is the resistance 1 MΩ or more?	Go to step 11 .	Go to step 10 .
10 CHECK HARNESS. With a tester connected, disconnect control modules in order. NOTE: Disconnect the body integrated unit at the end. Connector & terminal (B281) No. 28 - No. 20:	Are there any control modules whose resistance changed to 1 MΩ or more?	Replace the control module that has changed.	Repair or replace the harness due to resistance component.
11 CHECK CONTROL MODULE. With a tester connected, disconnect control modules in order. NOTE: Disconnect the body integrated unit at the end. Connector & terminal (i84) No. 27 - No. 35:	Are there any control modules whose resistance changed to 1 MΩ or more?	Replace the control module that has changed.	Repair or replace the harness due to resistance component.