Power Seat Position Is Not Memorized

SEAT: FRONT POWER SEAT CONTROL SYSTEM: Power Seat Position is not Memorized
- Power Seat Position is not Memorized

DESCRIPTION

When the set button of the memory adjusting switch is pressed, the multiplex network door ECU front directs the position control ECU to memorize the value of each position sensor.

WIRING DIAGRAM





INSEPCTION PROCEDURE

PROCEDURE

1. CHECK FRONT POWER SEAT CONTROL FUNCTION

(a) Check that each function of the power seat operates normally by using the front power seat switches.

OK:

Each function of power seat operates normally by using seat switches.

NG -- GO TO PROBLEM SYMPTOMS TABLE
OK -- Continue to next step.

2. CHECK SEAT MEMORY SWITCH FUNCTION (SEAT MEMORY FUNCTION)

(a) Correctly perform a memorizing operation, and then check whether the memory functions normally or the buzzer sounds to indicate that the memorizing operation has been completed.

NOTICE:
* The memory does not function when the SET, M1 and M2 switches are simultaneously pressed.
* If a memorizing operation has failed, release all switches. The seat memory function does not operate unless the switches are released.
OK -- NORMAL
NG -- Continue to next step.

3. READ VALUE USING TECHSTREAM (SEAT MEMORY SWITCH)

(a) Check the Data List for proper functioning of the front power seat switch, seat memory switch, unlock warning switch, front door courtesy light switch (for driver side), ignition switch and PNP switch.

Driver Seat, Passenger Seat





OK:

On Techstream screen, each item changes between ON, OFF and Mem and Not Mem according to above chart.

OK -- REPLACE POSITION CONTROL ECU
NG -- Continue to next step.

4. INSPECT SEAT MEMORY SWITCH





(a) Measure the resistance of the switch.

Standard resistance:





NG -- REPLACE SEAT MEMORY SWITCH
OK -- Continue to next step.

5. CHECK WIRE HARNESS (SEAT MEMORY SWITCH - MULTIPLEX NETWORK DOOR ECU FRONT [DOOR ECU])





(a) Disconnect the D20 or S29 switch connector.

(b) Disconnect the D22 or P42 ECU connector.

(c) Measure the resistance of the wire harness side connectors.

Standard resistance:

for Driver Side
for Front Passenger Side










NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

6. REPLACE MULTIPLEX NETWORK DOOR ECU FRONT (DOOR ECU)

(a) After replacing the multiplex network door ECU front, check that the front power seat control functions operate normally using the front seat switches and seat memory switch.

NG -- REPLACE SEAT MEMORY SWITCH

OK -- END (MULTIPLEX NETWORK DOOR ECU FRONT IS DEFECTIVE)