Inspection Procedure

1. Connect the hand-held tester (with CAN VIM) to the DLC3.
2. Turn the ignition switch ON and press the hand-held tester main switch ON.
3. Select the item below in the DATA LIST and read the displays on the hand-held tester.
4. Watch the hand-held tester screen while adjusting the seat with the power seat control switches. Check that the position sensor value changes.
5. Watch the hand-held tester screen while adjusting the seat with the power seat control switches. Check that the motor status changes from STANDBY to MOVING.

HINT:

When the seat is at an extreme position (for example, seat back position fully forward or sliding position fully rearward) and the power seat control switch is held down, the motor status should read LOCK. When the switch is released, the motor status should change to STANDBY.

Rear LH seat ECU: 

Fig 1: Rear LH Seat ECU - Data List

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Position sensor values should vary within the minimum and maximum values shown in the chart above. 

For the tester's motor status item, the display should change between STANDBY, MOVING and LOCK according to the chart above. 

NG: Go to step 2 

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE  ) 

1. Disconnect the R25 ECU and P50 sensor connectors.
2. Measure the resistance of the wire harness side connectors.

   Standard: 

   Fig 2: Terminals Resistance Reference Chart

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   Fig 3: Checking Wire Harness (Rear LH Seat ECU - Power Seat Position And Body Ground)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step. 

1. Disconnect P50 sensor connector.
2. Turn the ignition switch ON.
3. Measure the voltage of the ECU connector.

   Standard: 

   Fig 4: Terminals Voltage Reference Chart

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE REAR LH SEAT ECU 

Fig 5: Checking Rear LH Seat ECU (Sensor Power Source Voltage)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step. 

1. Turn the ignition switch ON.
2. Measure the voltage of the ECU connector.

   Standard: 

   Fig 6: Terminals Voltage Reference Chart

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

Slide the LH rear seat forward and reward. Check that the voltage readings vary within the "specified condition" shown in the chart above.

NG: REPLACE REAR SEAT INNER TRACK LH 

Fig 7: Checking Power Seat Position Sensor

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE  )