DTC B2609: IG

DTC detecting condition: 

When mismatch of the IGN SW (direct line) and IGN (CAN communication) continued for 10 seconds.

Trouble symptom: 

None

Wiring diagram: 

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

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK DTC  .
   1. Turn the ignition switch to ON.
   2. Read the DTC of [Power Seat Memory] using the Subaru Select Monitor. Ref. to Power Seat Memory System (Diagnostics)>Diagnostic Trouble Code (DTC) .

      Is DTC B2609 displayed? (Current malfunction)

      Yes  : Go to  2 .

      No  : Go to  4 .

2. CHECK POWER SEAT CONTROL MODULE IG SIGNAL  .

   Using the Subaru Select Monitor, check the following items in the [Data monitor] of [Power Seat Memory]. Ref. to Power Seat Memory System (Diagnostics)>Data Monitor .

   • Ignition Signal

   When the ignition switch is turned to ON/OFF, are the following indications displayed?

   When the ignition switch is turned to ON: [ON]

   When the ignition switch is turned to OFF: [OFF]

   Yes  : Go to  3 .

   No  : Inspect the body integrated unit. Ref. to BODY CONTROL (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE .

3. CHECK POWER SEAT CONTROL MODULE IG SIGNAL  .

   Using the Subaru Select Monitor, check the following items in the [Data monitor] of [Power Seat Memory]. Ref. to Power Seat Memory System (Diagnostics)>Data Monitor .

   • Ignition SW Signal

   When the ignition switch is turned to ON/OFF, are the following indications displayed?

   When the ignition switch is turned to ON: [ON]

   When the ignition switch is turned to OFF: [OFF]

   Yes  : Go to  5 .

   No  : Go to  4 .

4. CHECK HARNESS (OPEN CIRCUIT)  .
   1. Turn the ignition switch to OFF.
   2. Disconnect the power seat control module connector.
   3. Turn the ignition switch to ON.
   4. Using the tester, measure the voltage between power seat control module connector and chassis ground.

      Connector and terminal 

      (St42) No. 18 (+) - Chassis ground (-):

      Is the voltage 9.0 - 16 V?

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

      No  : Repair the open circuit in harness between power seat control module connector and fuse.

5. CHECK POOR CONTACT OF CONNECTORS  .
   1. Turn the ignition switch to OFF.
   2. Check for poor contact of power seat control module connector.

      Is the check result OK?

      Yes  : Repair or replace the poor contact of connector.

   3. 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.