Front Power Seat does not Operate with Front Power Seat Switch: Procedure

1. Remove the FR P/SEAT LH fuse from the cowl side junction block LH.
2. Remove the FR P/SEAT RH fuse from the cowl side junction block LH.
3. Remove the D/C CUT and MPX-B fuses from the engine room No. 1 relay block.
4. Measure the resistance of the fuses.

   Standard resistance

   Below 1 Ω

NG → REPLACE FUSE 

OK: Go to next step 

Fig 1: Identifying A6, A7, B7 And B8 Switch Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the a6, a7, b7and b8 switch connectors.
2. Measure the voltage and resistance of the wire harness side connectors.

   Standard voltage

   Driver side:

   Tester Connection	Condition	Specified Condition
   b8-5 (+B) - Body ground	Always	10 to 14 V
   b7-8 (SYSB) - Body ground	Always	10 to 14 V

   Passenger side:

   Tester Connection	Condition	Specified Condition
   a6-5 (+B) - Body ground	Always	10 to 14 V
   a7-8 (SYSB) - Body ground	Always	10 to 14 V

   Standard resistance

   Driver side:

   Tester Connection	Condition	Specified Condition
   b8-1 (GND) - Body ground	Always	Below 1 Ω

   Passenger side:

   Tester Connection	Condition	Specified Condition
   a6-1 (GND) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK → See step   3