Check DCCD Multi Select Switch

DIAGNOSIS:

Input signal of DCCD multi select switch is open or shorted.

TROUBLE SYMPTOM:

Does not enter the manual mode or auto mode when the mode change switch is pressed.
Mode does not change in AUTO mode.
Initial torque can not be changed in manual mode.

NOTE: Other switch input can not be received if either mode change switch or C.DIFF +/- switch is stuck ON.

WIRING DIAGRAM:

Drivers control center differential control system <Ref. to Driver's Control Center Differential Control System .>

Fig 1: Check DCCD Multi Select Switch Wiring Diagram

Courtesy of SUBARU OF AMERICA, INC.

Step	Check	Yes	No
1 CHECK DCCD CONTROL MODULE. Press the manual mode change switch. Read the data of «AUTO/MANUAL Mode Switch» using the Subaru Select Monitor.	Does the data change from OFF/ON?	Go to step 2 .	Go to step 4 .
2 CHECK DCCD CONTROL MODULE. Push the multi select switch toward plus. Read the data of «Up Switch» using the Subaru Select Monitor.	Does the data change from OFF/ON?	Go to step 3 .	Go to step 5 .
3 CHECK DCCD CONTROL MODULE. Push the multi select switch toward minus. Read the data of «Down Switch» using the Subaru Select Monitor.	Does the data change from OFF/ON?	Current condition is normal.	Go to step 6 .
4 CHECK MODE CHANGE SWITCH. Disconnect the multi select switch connector. Press the mode change switch. Using the tester, measure the resistance between terminals. Connector & terminal (AD10) No. 1 - No. 9:	Is the resistance less than 1 Ω?	Go to step 7 .	Replace the multi select switch. <Ref. to SI-DRIVE (SUBARU Intelligent Drive) Selector .>
5 CHECK MULTI SELECT SWITCH. Push the multi select switch toward plus. Using the tester, measure the resistance between terminals. Connector & terminal (AD10) No. 2 - No. 9:	Is the resistance less than 1 Ω?	Go to step 7 .	Replace the multi select switch. <Ref. to SI-DRIVE (SUBARU Intelligent Drive) Selector .>
6 CHECK MULTI SELECT SWITCH. Push the multi select switch toward minus. Using the tester, measure the resistance between terminals. Connector & terminal (AD10) No. 3 - No. 9:	Is the resistance less than 1 Ω?	Go to step 7 .	Replace the multi select switch. <Ref. to SI-DRIVE (SUBARU Intelligent Drive) Selector .>
7 CHECK HARNESS. Use a tester to measure the resistance between the multi select switch harness connector and chassis ground. Connector & terminal (R33) No. 9 - Chassis ground:	Is the resistance less than 1 Ω?	Go to step 8 .	Repair or replace the ground circuit.
8 CHECK HARNESS. Disconnect the connector from DCCD control module. Use a tester to measure the resistance between the DCCD control module and the multi select switch. Connector & terminal (R33) No. 1 - (B380) No. 6: (R33) No. 2 - (B380) No. 22: (R33) No. 3 - (B380) No. 4:	Is the resistance less than 1 Ω?	Go to step 9 .	Repair or replace the open circuit of the harness.
9 CHECK HARNESS. Using the tester, measure the resistance between terminals. Connector & terminal (R33) No. 1 - (R33) No. 2: (R33) No. 1 - (R33) No. 3: (R33) No. 2 - (R33) No. 3:	Is the resistance 1 MΩ or more?	Go to step 10 .	Repair or replace the short of harness.
10 CHECK HARNESS. Using the tester, measure the resistance between terminals. Connector & terminal (R33) No. 1 - Chassis ground: (R33) No. 2 - Chassis ground: (R33) No. 3 - Chassis ground:	Is the resistance 1 MΩ or more?	Replace the DCCD control module. <Ref. to Driver's Control Center Differential Control Module .>	Repair or replace the short of harness.