Power Seat Position Is Not Memorized

SEAT: REAR POWER SEAT CONTROL SYSTEM: Power Seat Position is not Memorized

Power Seat Position is not Memorized

DESCRIPTION

When the rear seat memory switch's SET switch is pressed, each position sensor's value is recorded into the position control ECU.

WIRING DIAGRAM









INSPECTION PROCEDURE

PROCEDURE

1. CHECK REAR POWER SEAT CONTROL FUNCTION
(a) Operate the rear power seat switch and check that each power seat function operates normally.
OK:
Each function operates normally.
NG -- GO TO PROBLEM SYMPTOMS TABLE
OK -- Continue to next step.
2. CHECK REAR SEAT RETURN FUNCTION
(a) When the rear door is opened, check that the door open linked return operation operates.
OK:
Door open linked return operation operates normally.
NG -- GO TO PROBLEM SYMPTOMS TABLE
OK -- Continue to next step.
3. CHECK REAR SEAT MEMORY FUNCTION
(a) Perform a memory operation correctly. Check that the buzzer sounds to indicate the completion of the memory operation.
OK:
Seat position is memorized normally.
NG -- READ VALUE USING INTELLIGENT TESTER OR TECHSTREAM (SEAT MEMORY SWITCH)
OK -- SYSTEM IS OK
4. READ VALUE USING INTELLIGENT TESTER OR TECHSTREAM (SEAT MEMORY SWITCH)
(a) Check the DATA LIST for proper functioning of the seat memory switch.
(1) Intelligent tester

RL-SEAT





RR-SEAT





(2) Techstream

Rear Left Seat





Rear Right Seat





OK:
On tester screen, each item changes between ON and OFF according to above chart.

Result





E -- INSPECT REAR SEAT MEMORY SWITCH RH
D -- INSPECT REAR SEAT MEMORY SWITCH LH
C -- REPLACE POSITION CONTROL ECU RH
B -- REPLACE POSITION CONTROL ECU RH
A -- REPLACE POSITION CONTROL ECU LH
5. INSPECT REAR SEAT MEMORY SWITCH LH





(a) Remove the memory switch Removal.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPLACE REAR SEAT MEMORY SWITCH LH
OK -- Continue to next step.
6. CHECK HARNESS AND CONNECTOR (REAR DOOR ECU LH - REAR SEAT MEMORY SWITCH LH)





(a) Disconnect the O15 ECU connector.
(b) Disconnect the Q7 switch connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE REAR DOOR ECU LH
7. INSPECT REAR SEAT MEMORY SWITCH RH





(a) Remove the memory switch Removal.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPLACE REAR SEAT MEMORY SWITCH RH
OK -- Continue to next step.
8. CHECK HARNESS AND CONNECTOR (REAR DOOR ECU RH - REAR SEAT MEMORY SWITCH RH)





(a) Disconnect the O2 ECU connector.
(b) Disconnect the Q2 switch connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE REAR DOOR ECU RH