Inspection Procedure

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

      Result 

      RESULT CHART
      
      

      Result	Proceed to
      B2653 output from driver seat ECU	A
      B2653 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
   Lifter Operation	Seat lifter operation UP / DOWN	-

   OK: Motor operates normally 

NG: Go to step  7

OK: Go to Next Step 

1. Disconnect the e46 switch connector.
2. Disconnect the e43 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) - e43-3 (VCC)	Always	Below 1 Ω
   e46-9 (SSRV) - e43-1 (O/ P)	Always	Below 1 Ω
   e46-18 (SGND) - e43-2 (GND)	Always	Below 1 Ω
   e46-8 (PVCC) - Body ground	Always	10 kΩ or higher
   e46-9 (SSRV) - Body ground	Always	10 kΩ or higher
   e46-18 (SGND) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 1: Identifying e46 Power Seat Switch And e43 Sensor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

1. Disconnect the e43 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
   e43-3 (VCC) - e43-2 (GND)	Lifter switch signal ON	7.2 to 8.8 V

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

Fig 2: Identifying e43 Position Control Sensor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

1. Reconnect the e43 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
   e43-1 (O/P) - Body ground	Lifter switch signal ON	0 to 8V

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

Fig 3: Identifying e43 Position Control Sensor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

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

   OK: DTC B2653 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 (lifter motor).
   1. Check if the seat adjuster moves smoothly when the battery is connected to the lifter motor connector terminals.

      OK 

      LIFTER MOTOR OPERATION CHART
      
      

      Measurement Condition	Operational Direction
      Battery positive (+) → 2 Battery negative (-) → 1	Upward
      Battery negative (-) → 1 Battery positive (+) → 2	Downward

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 e45 and e46 switch connectors.
2. Disconnect the e44 motor connector.
3. Measure the resistance according to the values in the table below.

   Standard Resistance 

   RESISTANCE SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   e46-2 (RRV+) - e44-2	Always	Below 1 Ω
   e45-5 (RRV-) - e44-1	Always	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 5: Identifying e45 And e46 Switch With e44 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
   Lifter Operation	Seat lifter operation	UP/DOWN

   OK: Motor operates normally 

NG: Go to step  14

OK: Go to Next Step 

1. Disconnect the e20 switch connector.
2. Disconnect the e28 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) - e28-3 (VCC)	Always	Below 1 Ω
   e20-9 (SSRV) - e28-1 (O/P)	Always	Below 1 Ω
   e20-18 (SGND) - e28-2 (GND)	Always	Below 1 Ω
   e20-8 (PVCC) - Body ground	Always	10 kΩ or higher
   e20-9 (SSRV) - 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 Switch And e28 Sensor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

1. Disconnect the e28 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
   e28-3 (VCC) - e28-2 (GND)	Lifter switch signal ON	7.2 to 8.8 V

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

Fig 7: Identifying e28 Position Control Sensor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

1. Reconnect the e28 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
   e28-1 (O/P) - Body ground	Lifter switch signal ON	0 to 8V

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

Fig 8: Identifying e28 Position Control Sensor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

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

   OK: DTC B2653 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 (lifter motor).
   1. Check if the seat adjuster moves smoothly when the battery is connected to the lifter motor connector terminals.

      OK 

      LIFTER MOTOR OPERATION CHART
      
      

      Measurement Condition	Operational Direction
      Battery positive (+) → 1 Battery negative (-) → 2	Upward
      Battery negative (-) → 2 Battery positive (+) → 1	Downward

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

Fig 9: Identifying Power Seat Motor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

1. Disconnect the e18 and e20 switch connectors.
2. Disconnect the e8 motor connector.
3. Measure the resistance of the wire harness side connectors.

   Standard Resistance 

   RESISTANCE SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   e20-2 (RRV+) - e8-1	Always	Below 1 Ω
   e18-5 (RRV-) - e8-2	Always	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 10: Identifying e18 And e20 Switch With e8 Motor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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