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All Function Fails To Operate (Driver's Seat, Without Memory)

DIAGNOSTIC PROCEDURE CHART

Step Check Yes No
1 CHECK SEAT FUNCTION. 
Operate each power seat switch and check that each power seat function operates normally.		 Does all function fails to operate? Go to step 2.  Check the motor which does not operate. <Ref. to SOME OF THE MOTORS DO NOT OPERATE (DRIVER'S SEAT, WITHOUT MEMORY) , INSPECTION, Power Seat System.>
2 CHECK FUSE. 
Check the power seat fuse inside the fuse box.		 Is the fuse blown out? Replace the appropriate fuse. Go to step 3. 
3 CHECK POWER SUPPLY CIRCUIT. 
  1. Disconnect the connector of power seat switch assembly.
  2. Measure the voltage between harness connector and chassis ground.

    Connector & terminal 

    (R190) No. 7 (+) - Chassis ground (-): 

 Is the voltage 10 V or more? Go to step 4.  Check body harness.
4 CHECK POWER SUPPLY CIRCUIT. 
Measure the resistance between power seat switch harness connector and chassis ground.
Connector & terminal 
(R190) No. 8 - Chassis ground: 		 Is resistance less than 10 Ω? Replace the power seat switch assembly. Check body harness.
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