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Diagnosis Procedure
1.CHECK FUSE
  1. Ignition switch OFF.
  2. Check that the following fuse is not blown (open).
    Signal nameFuse No.
    Battery power supply54 (20A)
Is the fuse blown (open)?
Replace the blown (open) fuse after repairing the affected circuit if a fuse is blown (open).
.
 
2.CHECK BATTERY POWER SUPPLY VOLTAGE
  1. Disconnect driver seat control unit connector.
  2. Check voltage between driver seat control unit harness connector and ground.
    +-Voltage
    Driver seat control unit
    ConnectorTerminal
    B21448GroundBattery voltage
Is the inspection result normal?
.
Repair the driver seat control unit battery power supply circuit.
 
3.CHECK GROUND CIRCUIT (OPEN)
Check continuity between driver seat control unit harness connector and ground.
Driver seat control unit—Continuity
ConnectorTerminal
B21451GroundExisted
Is the inspection result normal?
INSPECTION END
Repair the harness or connector.