Memory Switch Circuit

SEAT: FRONT POWER SEAT CONTROL SYSTEM (w/ Memory): Memory Switch Circuit

Memory Switch Circuit

DESCRIPTION

The seat memory switch sends signals to the power window regulator switch assembly (power window master switch) via the multiplex communication system to memorize a given seat position. This memory system does not use a position sensor. The seat position is detected by counting pulses that are output when the motor turns. If there is no pulse output from the motor, the motor will stop operating. The seat memory switch is later used to send signals to the front power seat switch to return the seat to one of the memorized positions.
The power seat memory operation can be performed only when the ignition switch is on and the shift lever is in the P position.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING INTELLIGENT TESTER
(a) Connect the intelligent tester (with CAN VIM) to the DLC3.
(b) Turn the ignition switch on.
(c) Read the DATA LIST.

D_SEAT (Position control ECU and switch assembly)





OK:
Condition status can be displayed.
NG -- INSPECT SEAT MEMORY SWITCH (DRIVING POSITION MEMORY SWITCH)
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. INSPECT SEAT MEMORY SWITCH (DRIVING POSITION MEMORY SWITCH)
(a) Remove the seat memory switch.





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






NG -- REPLACE SEAT MEMORY SWITCH
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (SEAT MEMORY SWITCH CIRCUIT)





(a) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR SWITCH ASSEMBLY - SEAT MEMORY SWITCH)
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
4. CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR SWITCH ASSEMBLY - SEAT MEMORY SWITCH)





(a) Disconnect the power window regulator switch assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY