DTC B260A: Acc

DTC detecting condition: 

When there is a difference between ACC status sent via LIN communication and ACC status sent from direct line for 10 seconds or more continuously.

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 (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

   Is DTC B260A displayed? (Current malfunction)

   Yes  : Go to  2.

   No  : Go to  4.

2. CHECK IG SIGNAL OF Power Seat & Remote Control Mirror 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 .

   • LIN ACC Signal

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

   When the ignition switch is turned to ACC: [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 IG SIGNAL OF Power Seat & Remote Control Mirror 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 .

   • ACC SW Signal

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

   When the ignition switch is turned to ACC: [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 & Remote Control Mirror 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 & terminal 

   (R502) No. 9 (+) - Chassis ground (-):

   Is the voltage 9.0 - 16 V?

   Yes  : Replace Power Seat & Remote Control Mirror 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 & Remote Control Mirror control module connector.

   Is the check result OK?

   Yes  : Repair or replace the poor contact of connector.

   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.