Driver Side Seat Memory Switch Circuit

SEAT: FRONT POWER SEAT CONTROL SYSTEM: Driver Side Seat Memory Switch Circuit
- Driver Side Seat Memory Switch Circuit

DESCRIPTION

The seat memory switch LH sends signals to the outer mirror control ECU LH 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 LH is later used to send signals to the front power seat switch LH (position control ECU) to return the seat to one of the memorized positions. The power seat memory switch LH operation can be performed only when the engine switch is on (IG) and the shift lever is in P.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (SEAT MEMORY SWITCH LH)

(a) Connect the Techstream to the DLC3.

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

(c) Enter the following menus: Body Electrical / Driver Seat / Data List.

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

Driver seat:





OK:

On the Techstream screen, each item changes between ON and OFF according to the above chart.

NG -- INSPECT SEAT MEMORY SWITCH LH

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures

2. INSPECT SEAT MEMORY SWITCH LH

(a) Remove the seat memory switch LH Removal.

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





Standard Resistance:





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

3. CHECK HARNESS AND CONNECTOR (OUTER MIRROR CONTROL ECU - SEAT MEMORY SWITCH, BODY GROUND)

(a) Disconnect the outer mirror control ECU LH 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 OUTER MIRROR CONTROL ECU LH Removal