Terminals Of Ecu

Fig 1: Locating Driver Seat ECU Connectors

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1. Disconnect the connector from the power seat ECU and inspect the connector on the wire harness side.
   POWER SEAT ECU CONNECTOR VOLTAGE AND CONTINUITY CONDITIONS
   
   

   Tester connection	Condition	Specified condition
   P21-8 <--> A7	Ignition switch OFF --> ON	0V --> 10-14V
   P22-8 <--> -A7	Constant	10-14V
   P21-9 <--> A7	Constant	10-14V
   P21-13 <--> A7	Constant	Continuity
   P22-7 <--> Ground	Constant	Continuity

   If the circuit is not as specified, inspect the circuits connected to other parts.

2. Connect the wire harness side connector to the power seat ECU and inspect the connector from the back side.
   POWER SEAT ECU CONNECTOR VOLTAGE AND CONTINUITY CONDITIONS
   
   

   Tester connection	Condition	Specified condition
   P22-4 <--> P22-7	Slide switch FRONT OFF --> ON	OV --> 10-14 V
   P22-3 <--> P22-7	Slide switch REAR OFF --> ON	0V-->10-14V
   P22-10 <--> P22-7	Front Vertical switch UP OFF --> ON	0V-->10-14V
   P22-9 <--> P22-7	Front Vertical switch DOWN OFF --> ON	0V --> 10-14V
   P22-6 P22-7	Lifter switch UP OFF --> ON	0V-->10-14V
   P22-5 <--> P22-7	Lifter switch DOWN OFF --> ON	0V- --> 10-14V
   P22-2 <--> P22-7	Reclining switch FRONT OFF --> ON	0V --> 10-14V
   P22-1 <--> P22-7	Reclining switch REAR OFF --> ON	0V --> 10-14V
   P21-14 <--> P22-7	Slide operation	0-8 V
   P21-3 <--> P22-7	Front Vertical operation	0-8 V
   P21-4 <--> P22-7	Lifter operation	0-8 V
   P21-5 <--> P22-7	Reclining operation	0-8 V
   P21-6 <--> P22-7	Power seat operation	0-8 V
   P21-15 <--> P22-7	Slide switch FRONT OFF --> ON	10-14V --> 0V
   P21-16 <--> P22-7	Slide switch REAR OFF --> ON	10-14 V- --> 0V
   P21-19 <--> P22-7	Front Vertical switch UP OFF --> ON	10-14 V --> 0V
   P21-7 <--> P22-7	Front Vertical switch DOWN OFF --> ON	10-14V --> 0V
   P21-17 <--> P22-7	Lifter switch UP OFF --> ON	10-14V-->0V
   P21-18 <--> P22-7	Lifter switch DOWN OFF --> ON	10-14V --> 0V
   P21-21 <--> P22-7	Reclining switch FRONT OFF --> ON	10-14V- --> 0V
   P21-22 <--> P22-7	Reclining switch REAR OFF --> ON	10-14 V --> OV

If the circuit is not as specified, inspect the circuits connected to other parts.