Inspection Procedure

1. Remove the D P/SEAT and D MPX-B 1 fuses from the main body ECU.
2. Remove the P P/SEAT 1 P MPX-B fuses from the passenger side junction block.
3. Measure the resistance according to the values in the table below.

   Standard resistance 

   FUSE
   
   

   Tester Connection	Condition	Specified Condition
   D P/SEAT fuse	Always	Below 1 Ω
   P P/SEAT1 fuse	Always	Below 1 Ω

NG: REPLACE FUSE 

OK: GO TO NEXT STEP 

Fig 1: Identifying Front Power Seat Switch Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the e45*1, e46*1, e20*2 and e18*2 switch connectors.
2. Measure the voltage according to the values in the table below.

   Standard voltage 

   for Driver Side 

   FRONT POWER SEAT SWITCH - BODY GROUND VOLTAGE (DRIVER SIDE)
   
   

   Tester Connection	Condition	Specified Condition
   e45-7 (+B) - Body ground	Always	11 to 14 V
   e46-4 (SYSB) - Body ground	Always	11 to 14 V

   for Passenger Side 

   FRONT POWER SEAT SWITCH - BODY GROUND VOLTAGE (PASSENGER SIDE)
   
   

   Tester Connection	Condition	Specified Condition
   e18-7 (+B) - Body ground	Always	11 to 14 V
   e20-4 (SYSB) - Body ground	Always	11 to 14 V

3. Measure the resistance according to the values in the table below.

   Standard resistance 

   for Driver Side 

   FRONT POWER SEAT SWITCH - BODY GROUND RESISTANCE (DRIVER SIDE)
   
   

   Tester Connection	Condition	Specified Condition
   e45-6 (GND) - Body ground	Always	Below 1 Ω

   for Passenger Side 

   FRONT POWER SEAT SWITCH - BODY GROUND RESISTANCE (PASSENGER SIDE)
   
   

   Tester Connection	Condition	Specified Condition
   e18-6 (GND) - Body ground	Always	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE FRONT POWER SEAT SWITCH (See  REMOVAL  )