Inspection Procedure

1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER OR TECHSTREAM (POWER SEAT MOTOR FUNCTION) 
   1. Select the ACTIVE TEST, use the intelligent tester or Techstream to generate a control command, and then check the power seat motor function
      1. Intelligent tester

         D-SEAT 

         D-SEAT REFERENCE
         
         

         Tester Display	Test Part	Control Range	Diagnostic Note
         F VERTICAL	Seat front vertical operation	UP / OFF / DOWN	-

      2. Techstream

         Driver Seat 

   DRIVER SEAT REFERENCE
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Front Vertical Operation	Seat front vertical operation	Up / OFF / Down	-

   OK: Motor operates normally 

   NG:  Go to step  6

   OK: Go to Next Step 

2. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH - FRONT POWER SEAT POSITION SENSOR LH) 
   1. Disconnect the e46 switch connector.
   2. Disconnect the e39 sensor connector.
   3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

   TESTER CONNECTION / SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   e46-8 (PVCC) - e39-3 (VCC)	Always	Below 1 Ω
   e46-19 (SSFV) - e39-1 (O/P)	Always	Below 1 Ω
   e46-18 (SGND) - e39-2 (GND)	Always	Below 1 Ω
   e46-8 (PVCC) - Body ground	Always	10 kΩ or higher
   e46-19 (SSFV) - Body ground	Always	10 kΩ or higher
   e46-18 (SGND) - Body ground	Always	10 kΩ or higher

   Fig 1: Identifying Terminals Of E46 Switch And E39 Sensor Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to Next Step 

3. CHECK FRONT SEAT ADJUSTER ASSEMBLY LH (POSITION CONTROL SENSOR) 
   1. Disconnect the e39 sensor connector.
   2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

   TESTER CONNECTION / SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   e39-3 (VCC) - e39-2 (GND)	Front vertical switch signal ON	7.2 to 8.8 V

   Fig 2: Identifying Terminals Of E39 Sensor Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   OK: Go to Next Step 

4. CHECK FRONT SEAT ADJUSTER ASSEMBLY LH (POSITION CONTROL SENSOR) 
   1. Reconnect the e39 sensor connector.
   2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

   TESTER CONNECTION / SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   e39-1 (O/P) - Body ground	Front vertical switch signal ON	0 to 8 V

   Fig 3: Identifying Terminals Of E39 Sensor Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   OK: Go to Next Step 

5. CHECK FOR DTC 
   1. Recheck for the DTC (see DTC CHECK / CLEAR ).

      OK: DTC B2652 is not output. 

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

   OK: USE SIMULATION METHOD TO CHECK  (See HOW TO PROCEED WITH TROUBLESHOOTING )

6. CHECK FRONT SEAT ADJUSTER ASSEMBLY LH (POWER SEAT MOTOR) 
   1. Check operation of the power seat motor (front vertical motor).
      1. Check if the seat adjuster moves smoothly when the battery is connected to the slide motor connector terminals.

         OK 

   TERMINALS REFERENCE CHART
   
   

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

   Fig 4: Identifying Terminals Of Power Seat Motor Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   OK: Go to Next Step 

7. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH - POWER SEAT MOTOR) 
   1. Disconnect the e45 and e46 switch connectors.
   2. Disconnect the e38 motor connector.
   3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

   TESTER CONNECTION / SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   e46-1 (FRV+) - e38-1	Always	Below 1 Ω
   e45-12 (FRV-) - e38-2	Always	Below 1 Ω

   Fig 5: Identifying Terminals Of E38 Motor, E45 And E46 Switch Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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