Inspection Procedure

1. Check that the manual switch of the front power seat can move the driver side seat normally.

   OK: Manual switch of the front power seat can move the driver side seat normally. 

OK: REPLACE POSITION CONTROL ECU 

NG: Go to next step. 

1. Disconnect the P21 and P22 ECU connectors.
   Fig 1: Identifying P21 And P22 ECU Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance and voltage of the wire harness side connectors.

   Standard voltage 

   VOLTAGE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   P21-9 (SYSB) - Body ground	10 to 14 V
   P22-8 (+B) - Body ground	10 to 14 V

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   P22-7 (GND) - Body ground	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step. 

1. Disconnect the D17, P21 and P23 ECU connectors.
   Fig 2: Identifying D17, P21 And P23 ECU Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   P21-10 (MPX1) - P23-11 (MPX2)	Below 1 Ω
   P21-11 (MPX2) - D17-22 (MPX1)	Below 1 Ω

   Result 

   RESULT CHART
   
   

   Result	Proceed to
   Both are OK	A
   One is OK	B
   Both are NG	C

B: REPLACE POSITION CONTROL ECU AND REPAIR OR REPLACE HARNESS AND CONNECTOR 

C: REPAIR OR REPLACE HARNESS AND CONNECTOR 

A: REPLACE POSITION CONTROL ECU (DRIVER SEAT ECU)