FRONT POWER SEAT CONTROL SYSTEM (w/ Memory), Diagnostic DTC:B2650

DESCRIPTION

When the position control ECU and switch assembly does not receive a sensor signal despite forward or backward movement of seat by power seat motor operation, this DTC is output.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK FOR DTC

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the ignition switch to ON.

   3. Turn the GTS on.

   4. Enter the following menus: Body Electrical / Driver Seat / Trouble Codes.

   5. Clear the DTC Click here.

   6. Recheck for DTC B2650.

      Result
      Result Proceed to DTC B2650 is output A DTC B2650 is not output B

   
   

   B

   USE SIMULATION METHOD TO CHECK Click here

   A

2. PERFORM ACTIVE TEST USING GTS (SLIDE MOTOR)

   
   

   1. Enter the following menus: Body Electrical / Driver Seat / Active Test.

   2. Perform the Active Test according to the display on the GTS.

      Driver Seat

      Tester Display	Test Part	Control Range	Diagnostic Note
      Seat Slide Operation	Seat sliding operation	OFF/Front/Rear	-

      OK
      Motor operates normally.

   
   

   NG

   INSPECT FRONT SEAT FRAME WITH ADJUSTER ASSEMBLY LH Click here

   OK

3. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY - SLIDE MOTOR)

   
   

   1. Disconnect the T11 position control ECU and switch assembly connector.

   2. Disconnect the T12 slide motor (front seat frame with adjuster assembly LH) connector.

   3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition T11-3 (PVCC) - T12-5 (VCC) Always Below 1 Ω T11-2 (SSRS) - T12-2 (O/P) Always Below 1 Ω T11-1 (SGND) - T12-6 (GND) Always Below 1 Ω T11-3 (PVCC) - Body ground Always 10 kΩ or higher T11-2 (SSRS) - Body ground Always 10 kΩ or higher T11-1 (SGND) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

4. CHECK POSITION CONTROL ECU AND SWITCH ASSEMBLY (SLIDE MOTOR CIRCUIT)

   
   

   1. Reconnect the T11 position control ECU and switch assembly connector.

   2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition T12-5 (VCC) - T12-6 (GND) Slide switch on 5.5 to 6.5 V

   
   

   NG

   REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY Click here

   OK

   REPLACE FRONT SEAT FRAME WITH ADJUSTER ASSEMBLY LH Click here

5. INSPECT FRONT SEAT FRAME WITH ADJUSTER ASSEMBLY LH

   
   

   1. Disconnect the T12 slide motor (front seat frame with adjuster assembly LH) connector.

   2. 

      Text in Illustration

      *a	Component without harness connected (Slide Motor (Front Seat Frame with Adjuster Assembly LH))

      Check if the seat frame moves smoothly when the battery is connected to the slide motor connector terminals.

      OK
      Condition Operational Direction Battery positive (+) → Terminal 3 Battery negative (-) → Terminal 4 Forward Battery positive (+) → Terminal 4 Battery negative (-) → Terminal 3 Backward

   
   

   NG

   REPLACE FRONT SEAT FRAME WITH ADJUSTER ASSEMBLY LH Click here

   OK

6. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY - SLIDE MOTOR)

   
   

   1. Disconnect the T10 position control ECU and switch assembly connector.

   2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition T10-2 (SLD+) - T12-3 (FWD) Always Below 1 Ω T10-4 (SLD-) - T12-4 (BACK) Always Below 1 Ω T10-2 (SLD+) - Body ground Always 10 kΩ or higher T10-4 (SLD-) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

   REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY Click here