DTC B2607: Seat Motor Relay Failure

DTC detecting condition: 

When the same error status is detected 3 times in a row in motor relay output for each axis in the normal operating status.

Trouble symptom: 

Seat operation is not possible with memory function.

Wiring diagram: 

Power seat system Ref. to WIRING SYSTEM>POWER SEAT SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK DTC. 
   1. Using the Subaru Select Monitor, perform the clear memory of [Power Seat Memory]. Ref. to COMMON (diag)>CLEAR MEMORY .
   2. Turn the ignition switch to OFF.
   3. Disconnect, and then connect the power seat control module connector.
   4. Turn the ignition switch to ON.
   5. Move each axis using the power seat manual switch, and then perform the memory recall.
      NOTE: Move to a position different from the one registered in the memory before performing the memory recall.
   6. Read the DTC of [Power Seat Memory] using the Subaru Select Monitor, Ref. to POWER SEAT MEMORY (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

      Is DTC B2607 displayed? (Current malfunction)

      YES  : Go to  2.

      NO  : Even if DTC is displayed, the circuit has returned to a normal condition at this time.

      Reproduce the failure, and perform the diagnosis again.

      NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.
2. CHECK POWER SEAT CONTROL MODULE. 

   Using the Subaru Select Monitor, check the following items in the [Data monitor] of [Power Seat Memory]. Ref. to POWER SEAT MEMORY (DIAGNOSTICS)>DATA MONITOR .

   • Slide Output
   • Reclining Output
   • Lifter Output
   • Tilt Output

   Is "Abnormal" displayed in any of the motor output statuses?

   YES 

   Replace the corresponding motor.

   • For slide motor, tilt motor or lifter motor, replace the seat cushion frame assembly, Ref. to SEATS>FRONT SEAT>DISASSEMBLY .
   • For reclining motor, replace the backrest frame assembly. Ref. to SEATS>FRONT SEAT>DISASSEMBLY .

   NO  : Go to  3.

3. CHECK HARNESS (GROUND SHORT CIRCUIT). 
   1. Turn the ignition switch to OFF.
   2. Disconnect the connector of power seat control module.
   3. Disconnect the slide motor connector.
   4. Disconnect the tilt motor connector.
   5. Disconnect the lifter motor connector.
   6. Disconnect the reclining motor connector.
   7. Using the tester, measure the resistance between power seat control module connector and chassis ground.

      Connector and terminal 

      (R156) No. 9 - Chassis ground:

   Is the resistance 1 MΩ or more?

   YES  : Go to  4.

   NO  : Repair or replace the short circuit to ground in harness between power seat control module connector and motor connector.

4. CHECK SLIDE MOTOR. 
   1. Connect the slide motor connector.
   2. Using the tester, measure the resistance between power seat control module connector and chassis ground.

      Connector and terminal 

      (R156) No. 9 - Chassis ground:

   Is the resistance 1 MΩ or more?

   YES  : Go to  5.

   NO  : Replace the seat cushion frame assembly. Ref. to SEATS>FRONT SEAT>DISASSEMBLY .

5. CHECK TILT MOTOR. 
   1. Disconnect the slide motor connector.
   2. Connect the tilt motor connector.
   3. Using the tester, measure the resistance between power seat control module connector and chassis ground.

      Connector and terminal 

      (R156) No. 9 - Chassis ground:

   Is the resistance 1 MΩ or more?

   YES  : Go to  6.

   NO  : Replace the seat cushion frame assembly. Ref. to SEATS>FRONT SEAT>DISASSEMBLY .

6. CHECK LIFTER MOTOR. 
   1. Disconnect the tilt motor connector.
   2. Connect the lifter motor connector.
   3. Using the tester, measure the resistance between power seat control module connector and chassis ground.

      Connector and terminal 

      (R156) No. 9 - Chassis ground:

   Is the resistance 1 MΩ or more?

   YES  : Go to  7.

   NO  : Replace the seat cushion frame assembly. Ref. to SEATS>FRONT SEAT>DISASSEMBLY .

7. CHECK RECLINING MOTOR. 
   1. Disconnect the lifter motor connector.
   2. Connect the reclining motor connector.
   3. Using the tester, measure the resistance between power seat control module connector and chassis ground.

      Connector and terminal 

      (R156) No. 9 - Chassis ground:

   Is the resistance 1 MΩ or more?

   YES 

   Replace the power seat control module. Ref. to SEATS>POWER SEAT SYSTEM .

   NO  : Check the battery. Ref. to STARTING/CHARGING SYSTEMS (H4DOTC)>BATTERY>INSPECTION .