DESCRIPTION When the
position control ECU assembly does not receive a reclining motor
position sensor signal despite the seat having been moved forward or
rearward by power seat motor operation, this DTC is stored. |
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area | |
B2651 | Reclining Sensor Malfunction |
Reclining motor position sensor signal not received when power seat moved forward or rearward |
- Position control ECU assembly
- Reclining motor (front seatback frame sub-assembly LH)
- Wire harness or connector
| WIRING DIAGRAM
 PROCEDURE
(a) Clear the DTCs. Body Electrical > Driver Seat > Clear DTCs
|
NEXT |
 | |
(a) Check for DTCs. Body Electrical > Driver Seat > Trouble Codes
OK: DTC B2651 is not output.
| OK |
 | USE SIMULATION METHOD TO CHECK |
|
NG | |
| |
| 3. |
PERFORM ACTIVE TEST USING TECHSTREAM (SEAT RECLINING OPERATION) |
(a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG).
(c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Driver Seat / Active Test.
(e) Perform the Active Test according to the display on the Techstream. Body Electrical > Driver Seat > Active Test
|
Tester Display | Measurement Item |
Control Range | Diagnostic Note | |
Seat Reclining | Seat reclining operation |
OFF/Rear/Front | - | Body Electrical > Driver Seat > Active Test
|
Tester Display | | Seat Reclining |
OK: Reclining motor operates normally.
| NG |
| GO TO STEP 7 |
|
OK | |
| |
| 4. |
CHECK POSITION CONTROL ECU ASSEMBLY (RECLINING MOTOR CIRCUIT) |
(a) Disconnect the a10 reclining motor (front seatback frame sub-assembly LH) connector.
(b) Measure the voltage according to the value(s) in the table below. Standard Voltage: |
Tester Connection | Condition |
Specified Condition | |
a10-4 (SSRR) - a10-2 (SENG) |
Reclining switch on | 4.8 to 5.1 V |
| NG |
| GO TO STEP 6 |
|
OK | |
| |
| 5. |
CHECK RECLINING MOTOR (FRONT SEATBACK FRAME SUB-ASSEMBLY LH) |
| (a) Reconnect the a10 reclining motor (front seatback frame sub-assembly LH) connector. |
 |
|
*a | Component with harness connected
(Reclining Motor (Front Seatback Frame Sub-assembly LH)) | | |
(b) Measure the voltage according to the value(s) in the table below. Standard Voltage: |
Tester Connection | Condition |
Specified Condition | |
a10-4 (SSRR) - Body ground |
Reclining motor operating |
4.5 to 4.8 V |
| OK |
| REPLACE POSITION CONTROL ECU ASSEMBLY |
| NG |
| REPLACE RECLINING MOTOR (FRONT SEATBACK FRAME SUB-ASSEMBLY LH) |
| 6. |
CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - RECLINING MOTOR (FRONT SEATBACK FRAME SUB-ASSEMBLY LH)) |
(a) Disconnect the R32 position control ECU assembly connector. (b) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
R32-11 (SSRR) - a10-4 (SSRR) |
Always | Below 1 Ω | |
R32-11 (SSRR) or a10-4 (SSRR) - Body ground |
Always | 10 kΩ or higher | |
R32-12 (SENG) - a10-2 (SENG) |
Always | Below 1 Ω | |
R32-12 (SENG) or a10-2 (SENG) - Body ground |
Always | 10 kΩ or higher |
| OK |
| REPLACE POSITION CONTROL ECU ASSEMBLY |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
| 7. |
INSPECT RECLINING MOTOR (FRONT SEATBACK FRAME SUB-ASSEMBLY LH) |
(a) Remove the reclining motor (front seatback frame sub-assembly LH).
Click here  (b) Inspect the reclining motor (front seatback frame sub-assembly LH).
Click here
| NG |
| REPLACE RECLINING MOTOR (FRONT SEATBACK FRAME SUB-ASSEMBLY LH) |
|
OK | |
| |
| 8. |
CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - RECLINING MOTOR (FRONT SEATBACK FRAME SUB-ASSEMBLY LH)) |
(a) Disconnect the R33 and R30 position control ECU assembly connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
R33-10 (RCL+) - a10-3 (RCL+) |
Always | Below 1 Ω | |
R33-10 (RCL+) or a10-3 (RCL+) - Body ground |
Always | 10 kΩ or higher | |
R30-6 (RCL-) - a10-1 (RCL-) |
Always | Below 1 Ω | |
R30-6 (RCL-) or a10-1 (RCL-) - Body ground |
Always | 10 kΩ or higher |
| OK |
| REPLACE POSITION CONTROL ECU ASSEMBLY |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR | | 
