Up to 08/2009

SEAT: FRONT POWER SEAT CONTROL SYSTEM (w/ Memory): One or more Power Seat Motors do not Operate
- One or more Power Seat Motors do not Operate

DESCRIPTION

When a signal is input into the position control ECU, the ECU manages the signals received from the front power seat switch, and operates each motor. If the position control ECU and switch assembly receives more than 2 motor operation signals, the motor is stopped. Manual operation is restarted after the position control ECU and switch assembly receives 1 signal only.

HINT
The position control ECU and front power seat switch are built into an assembly that is referred to as the position control ECU and switch assembly.

WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1. CHECK CAN COMMUNICATION SYSTEM

(a) Use the Techstream to check if the CAN communication system is functioning normally How to Proceed With Troubleshooting.

OK:

CAN communication DTC is not output.

NG -- GO TO CAN COMMUNICATION SYSTEM CAN Communication System
OK -- Continue to next step.

2. READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / D-Seat / Data List.

(e) Read the Data List according to the display on the Techstream.

D-Seat





OK:

ON or OFF is displayed on the Techstream according to the table above.

NG -- CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY POWER SOURCE)
OK -- Continue to next step.

3. PERFORM ACTIVE TEST USING TECHSTREAM

(a) Enter the following menus: Body Electrical / D-Seat / Active Test.

(b) Perform the Active Test according to the display on the Techstream.

D-Seat





OK:

The power seat motors operate normally.

NG -- INSPECT FRONT SEAT ASSEMBLY LH

OK -- REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY Removal

4. INSPECT FRONT SEAT ASSEMBLY LH

(a) Remove the front seat assembly LH Removal.





(b) Disconnect the a1, a3, a12 and a13 connectors from each motor.

(c) Check operation of the slide motor.

(1) Check if the seat moves smoothly when the battery is connected to the slide motor connector terminals.

OK:





Text in Illustration





(d) Check operation of the front vertical motor.





(1) Check if the seat moves smoothly when the battery is connected to the front vertical motor connector terminals.

OK:





Text in Illustration





(e) Check operation of the lifter motor.





(1) Check if the seat moves smoothly when the battery is connected to the lifter motor connector terminals.

OK:





Text in Illustration





(f) Check operation of the reclining motor.





(1) Check if the seat moves smoothly when the battery is connected to the reclining motor connector terminals.

OK:





Text in Illustration





NG -- REPLACE FRONT SEAT ASSEMBLY LH Removal
OK -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY LH - SEAT MOTOR)

(a) Disconnect the a9 connector from the position control ECU and switch assembly.





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY Removal

6. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY POWER SOURCE)

(a) Disconnect the a8 connector from the position control ECU and switch assembly.





(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY POWER SOURCE)

OK -- REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY Removal