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DTC P0A3F: Drive Motor "A" Position Sensor Circuit: Wiring Diagram

WARNING: This page is about a different car, the 2015 Subaru XV Crosstrek. However, it is still accessible from the selected car via links, so may be relevant.

CVT control system < Ref. to WIRING DIAGRAM , CVT Control System.>

Fig 1: Drive Motor A Position Sensor Circuit - Wiring Diagram
G09479245Courtesy of SUBARU OF AMERICA, INC.
DTC PROCEDURE

Step Check Yes No
1 CHECK HARNESS AND DRIVE MOTOR. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the DMCM connector (R442).
  3. Using a tester, measure the resistance between terminals in DMCM connector.

    Connector & terminal 

    R1-R2 

    (R442) No. 6 - (R442) No. 17: 

    S1-S3 

    (R442) No. 10 - (R442) No. 8: 

    S2-S4 

    (R442) No. 9 - (R442) No. 7: 

 Is each resistance value as shown in below?
R1-R2: Is the value out of 7 - 23 Ω range?
or
S1-S3: Is the value out of 10 - 39 Ω range?
or
S2-S4: Is the value out of 11 - 40 Ω range?		 Go to step 2  . Go to step 3  .
2 CHECK DRIVE MOTOR. 
  1. Disconnect the drive motor assembly connector.
  2. Using a tester, measure the resistance between terminals in the drive motor assembly connector.

    Connector & terminal 

    R1-R2 

    (T32) No. 14 - (T32) No. 15: 

    S1-S3 

    (T32) No. 9 - (T32) No. 10: 

    S2-S4 

    (T32) No. 12 - (T32) No. 11: 

 Is each resistance value as shown in below?
R1-R2: Is the value out of 7 - 23 Ω range?
or
S1-S3: Is the value out of 10 - 39 Ω range?
or
S2-S4: Is the value out of 11 - 40 Ω range?		 Replace the drive motor assembly. < Ref. to appropriate DRIVE MOTOR ASSEMBLY in Continuously Variable Transmission TH58A article.> Repair the open circuit and short circuit to ground in harness between DMCM connector and drive motor assembly connector.
3 CHECK HARNESS AND DRIVE MOTOR. 
Using a tester, check the resistance between DMCM connector terminals and the ground bolt of inverter frame body.
Connector & terminal 
(R442) No. 6 - Ground bolt of inverter frame body: 
(R442) No. 10 - Ground bolt of inverter frame body: 
(R442) No. 9 - Ground bolt of inverter frame body: 		 Does the resistance between either two points show 1 MΩ or less? Go to step 4  . Go to step 5  .
4 CHECK DRIVE MOTOR. 
  1. Disconnect the drive motor assembly connector.
  2. Using a tester, measure the resistance between the drive motor assembly connector and chassis ground.

    Connector & terminal 

    (T32) No. 14 - Chassis ground: 

    (T32) No. 9 - Chassis ground: 

    (T32) No. 12 - Chassis ground: 

 Does the resistance between either two points show 1 MΩ or less? Replace the drive motor assembly. < Ref. to appropriate DRIVE MOTOR ASSEMBLY in Continuously Variable Transmission TH58A article.> Repair the short circuit to ground in harness between DMCM connector and drive motor assembly connector.
5 CHECK HARNESS. 
  1. Disconnect the DMCM connector (R443).
  2. Disconnect the intermediate connector (R436).
  3. Using a tester, measure the resistance between terminals in the DMCM connector and between the terminals in the intermediate connector (R436).

    Connector & terminal 

    (R442) No. 10 - (R442) No. 1 - 22 (except No. 8): 

    (R442) No. 10 - (R443) No. 1 - 26: 

    (R442) No. 10 - (R436) No. 1 - 8: 

    (R442) No. 8 - (R442) No. 1 - 22 (except No. 10): 

    (R442) No. 8 - (R443) No. 1 - 26: 

    (R442) No. 8 - (R436) No. 1 - 8: 

    (R442) No. 9 - (R442) No. 1 - 22 (except No. 7): 

    (R442) No. 9 - (R443) No. 1 - 26: 

    (R442) No. 9 - (R436) No. 1 - 8: 

    (R442) No. 7 - (R442) No. 1 - 22 (except No. 9): 

    (R442) No. 7 - (R443) No. 1 - 26: 

    (R442) No. 7 - (R436) No. 1 - 8: 

    (R442) No. 6 - (R442) No. 1 - 22 (except No. 17): 

    (R442) No. 6 - (R443) No. 1 - 26: 

    (R442) No. 6 - (R436) No. 1 - 8: 

    (R442) No. 17 - (R442) No. 1 - 22 (except No. 6): 

    (R442) No. 17 - (R443) No. 1 - 26: 

    (R442) No. 17 - (R436) No. 1 - 8: 

 Does the resistance between either two points show 1 MΩ or more? Go to step 6  . Repair the short circuit of harness between DMCM connector and drive motor assembly connector, or repair the intermediate connector.
6 CHECK HARNESS. 
  1. Disconnect the drive motor assembly connector.
  2. Using a tester, measure the resistance between terminals in the drive motor assembly connector.

    Connector & terminal 

    (B603) No. 9 - (B603) No. 1 - 20 (except No. 10): 

    (B603) No. 10 - (B603) No. 1 - 20 (except No. 9): 

    (B603) No. 12 - (B603) No. 1 - 20 (except No. 11): 

    (B603) No. 11 - (B603) No. 1 - 20 (except No. 12): 

    (B603) No. 14 - (B603) No. 1 - 20 (except No. 15): 

    (B603) No. 15 - (B603) No. 1 - 20 (except No. 14): 

 Does the resistance between either two points show 1 MΩ or more? Go to step 7  . Repair the short circuit of harness between DMCM connector and drive motor assembly connector, or repair the intermediate connector.
7 CHECK DRIVE MOTOR. 
Using a tester, measure the resistance between terminals in the drive motor assembly connector.
Connector & terminal 
(T32) No. 9 - (T32) No. 1 - 20 (except No. 10): 
(T32) No. 10 - (T32) No. 1 - 20 (except No. 9): 
(T32) No. 12 - (T32) No. 1 - 20 (except No. 11): 
(T32) No. 11 - (T32) No. 1 - 20 (except No. 12): 
(T32) No. 14 - (T32) No. 1 - 20 (except No. 15): 
(T32) No. 15 - (T32) No. 1 - 20 (except No. 14): 		 Does the resistance between either two points show 1 MΩ or more? Replace DMCM. < Ref. to appropriate DRIVE MOTOR CONTROL MODULE in Continuously Variable Transmission TH58A article.> Replace the drive motor assembly. < Ref. to appropriate DRIVE MOTOR ASSEMBLY in Continuously Variable Transmission TH58A article.>
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