Inspection Procedure

1. DTC output area check
   1. Using the Techstream, determine the area that output the DTC.

      Result 

      RESULT CHART
      
      

      Result	Proceed to
      B2651 output from driver seat ECU	A
      B2651 output from passenger seat ECU	B

B: Go to step  9

A: Go to Next Step 

1. Select the Active Test, use the Techstream to generate a control command, and then check the power seat motor function.

   Driver Seat 

   DRIVER SEAT ACTIVE TEST REFERENCE CHART
   
   

   Tester Display	Test Part	Control Range
   Seat Reclining	Seat reclining operation	FRONT/REAR

   OK: Motor operates normally 

NG: Go to step  7

OK: Go to Next Step 

1. Disconnect the e46 switch connector.
2. Disconnect the e48 sensor connector.
3. Measure the resistance according to the values in the table below.

   Standard Resistance 

   RESISTANCE SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   e46-8 (PVCC) - e48-3 (VCC)	Always	Below 1 Ω
   e46-22 (SSRR) - e48-1 (O/P)	Always	Below 1 Ω
   e46-18 (SGND) - e48-2 (GND)	Always	Below 1 Ω
   e46-8 (PVCC) - Body ground	Always	10 kΩ or higher
   e46-22 (SSRR) - Body ground	Always	10 kΩ or higher
   e46-18 (SGND) - Body ground	Always	10 kΩ or higher

   Fig 1: Identifying e46 Power Seat Switch And e48 Sensor Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to Next Step 

1. Disconnect the e48 sensor connector.
2. Measure the voltage according to the values in the table below.

   Standard Voltage 

   VOLTAGE SPECIFIED CONDITIONS
   
   

   Tester Connection	Switch Condition	Specified Condition
   e48-3 (VCC) - e48-2 (GND)	Reclining switch signal ON	7.2 to 8.8 V

NG: REPLACE FRONT POWER SEAT SWITCH LH  (See REMOVAL  )

Fig 2: Identifying e48 Position Control Sensor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

1. Reconnect the e48 sensor connector.
2. Measure the voltage according to the value in the table below.

   Standard Voltage 

   VOLTAGE SPECIFIED CONDITIONS
   
   

   Tester Connection	Switch Condition	Specified Condition
   e48-1 (O/P) - Body ground	Reclining switch signal ON	0 to 8V

   Fig 3: Identifying e48 Position Control Sensor Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE FRONT SEAT ADJUSTER ASSEMBLY LH  (See REMOVAL  )

OK: Go to Next Step 

1. Clear the DTC (see DTC CHECK / CLEAR  ).
2. Recheck the DTC.

   OK: DTC B2651 is not output. 

NG: REPLACE FRONT POWER SEAT SWITCH LH  (See REMOVAL  )

OK: END (SYSTEM RETURNS TO NORMAL) 

1. Check operation of the power seat motor (reclining motor).
   1. Check if the seat adjuster moves smoothly when the battery is connected to the reclining motor connector terminals.

      OK 

      RECLINING MOTOR OPERATION CHART
      
      

      Measurement Condition	Operational Direction
      Battery positive (+) → 2 Battery negative (-) → 1	Forward
      Battery positive (+) → 1 Battery negative (-) → 2	Backward

NG: REPLACE FRONT SEAT ADJUSTER ASSEMBLY LH  (See REMOVAL  )

Fig 4: Identifying Power Seat Motor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

1. Disconnect the e46 and e45 switch connectors.
2. Disconnect the e47 motor connector.
3. Measure the resistance according to the values in the table below.

   Standard Resistance 

   RESISTANCE SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   e46-3 (RCL+) - e47-2	Always	Below 1 Ω
   e45-3 (RCL-) - e47-1	Always	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 5: Identifying E46 And E45 Switch With E47 Motor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE FRONT POWER SEAT SWITCH LH  (See REMOVAL  )

1. Select the Active Test, use the Techstream to generate a control command, and then check the power seat motor function.

   Passenger Seat 

   PASSENGER SEAT ACTIVE TEST REFERENCE CHART
   
   

   Tester Display	Test Part	Control Range
   Seat Reclining	Seat reclining operation	FRONT/REAR

   OK: Motor operates normally 

NG: Go to step  14

OK: Go to Next Step 

1. Disconnect the e20 switch connector.
2. Disconnect the e15 sensor connector.
3. Measure the resistance according to the values in the table below.

   Standard Resistance 

   RESISTANCE SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   e20-8 (PVCC) - e15-3 (VCC)	Always	Below 1 Ω
   e20-22 (SSRR) - e15-1 (O/P)	Always	Below 1 Ω
   e20-18 (SGND) - e15-2 (GND)	Always	Below 1 Ω
   e20-8 (PVCC) - Body ground	Always	10 kΩ or higher
   e20-22 (SSRR) - Body ground	Always	10 kΩ or higher
   e20-18 (SGND) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 6: Identifying e20 Power Seat Switch And e15 Sensor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

1. Disconnect the e15 sensor connector.
2. Measure the voltage according to the values in the table below.

   Standard Voltage 

   VOLTAGE SPECIFIED CONDITIONS
   
   

   Tester Connection	Switch Condition	Specified Condition
   e15-3 (VCC) - e15-2 (GND)	Reclining switch signal ON	7.2 to 8.8 V

   Fig 7: Identifying e15 Position Control Sensor Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE FRONT POWER SEAT SWITCH RH  (See REMOVAL  )

OK: Go to Next Step 

1. Reconnect the e15 sensor connector.
2. Measure the voltage according to the value in the table below.

   Standard Voltage 

   VOLTAGE SPECIFIED CONDITIONS
   
   

   Tester Connection	Switch Condition	Specified Condition
   e15-1 (O/P) - Body ground	Reclining switch signal ON	0 to 8V

   Fig 8: Identifying e15 Position Control Sensor Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE FRONT SEAT ADJUSTER ASSEMBLY RH  (See REMOVAL  )

OK: Go to Next Step 

1. Clear the DTC (see DTC CHECK / CLEAR  ).
2. Recheck the DTC.

   OK: DTC B2651 is not output. 

NG: REPLACE FRONT POWER SEAT SWITCH RH  (See REMOVAL  )

OK: END (SYSTEM RETURNS TO NORMAL) 

1. Check operation of the power seat motor (reclining motor).
   1. Check if the seat adjuster moves smoothly when the battery is connected to the reclining motor connector terminals.

      OK 

      RECLINING MOTOR OPERATION CHART
      
      

      Measurement Condition	Operational Direction
      Battery positive (+) → 2 Battery negative (-) → 1	Forward
      Battery positive (+) → 1 Battery negative (-) → 2	Backward

      Fig 9: Identifying Power Seat Motor Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE FRONT SEAT ADJUSTER ASSEMBLY RH  (See REMOVAL  )

OK: Go to Next Step 

1. Disconnect the e18 and e20 switch connectors.
2. Disconnect the e14 motor connector.
3. Measure the resistance according to the values in the table below.

   Standard Resistance 

   RESISTANCE SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   e20-3 (RCL+) - e14-2	Always	Below 1 Ω
   e18-3 (RCL-) - e14-1	Always	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 10: Identifying e18 And e20 Switch With e14 Motor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE FRONT POWER SEAT SWITCH RH  (See REMOVAL  )