Inspection Procedure

Check position sensor.

Fig 1: Checking Position Sensor

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

PREPARATION:

Disconnect the connector of the sensor and the connector of the motor leading to the sensor.

CHECK:

Connect positive (+) lead to terminal 3 of sensor and negative (-) lead to terminal 2.
Measure voltage between terminal 1 of sensor and body ground when battery positive voltage is applied between terminals 1 and 2 of motor connector.

NOTE: When the battery positive voltage is applied to the motor connector terminals,(+) and (-) are interchangeable.

OK:

POSITION SENSOR CONDITION VOLTAGE

Condition	Voltage
Motor Stopped (Check Several Times With The Motor In A Different Position Each Time.)	0 V Or Battery Positive Voltage According To Stop Position
With Motor Turning	Half Of Battery Positive Voltage

NG: Replace position sensor.

OK: Go to next step.

Check harness and connectors between Seat Position Control ECU and position sensors (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
NG: Repair or replace harness or connectors.

OK: Check and replace Seat Position Control ECU.