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Home >> Lexus >> 2004 >> GX 470 >> Repair and Diagnosis >> Body & Frame >> Seats >> Front Power Seat Control System (W/Memory) - Diagnosis >> Memory Switch Circuit >> Inspection Procedure

Inspection Procedure

  1. INSPECT SEAT MEMORY SWITCH 
    1. Disconnect the seat memory switch connector.
    2. Check the continuity of each terminal when each switch is operated.

    Standard: 

    TERMINAL NO , SWITCH POSITION AND SPECIFIED CONDITION

    Terminal No. Switch Position Specified Condition
    1 <=> 2 SET switch ON Continuity
    2 <=> 3 SW1 switch ON Continuity
    2 <=> 4 SW2 switch ON Continuity
    Fig 1: Inspecting Seat Memory Switch
    G03476829Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE SEAT MEMORY SWITCH 
    2. OK: Go To Next Step 
  2. CHECK WIRE HARNESS (SEAT MEMORY SWITCH --> INSTRUMENT PANEL JUNCTION BLOCK ASSY (BODY ECU)) 
    1. Disconnect the D22 switch and B3 ECU connectors.
    2. Check the continuity between the wire harness side connectors.
    Fig 2: Checking Continuity Between Wire Harness Side Connectors
    G03476830Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SYMBOLS (TERMINAL NO.) AND CONDITION SPECIFICATION

    Symbols (Terminal No.) Condition Specified Condition
    M1 (D22-3) <=> M1 (B3-20) Constant Continuity
    M2 (D22-4) <=> M2 (B3-2) Constant Continuity
    MRY (D22-2) <=> MM (B3-8) Constant Continuity
    E (D22-1) <=> Body ground Constant Continuity
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK: CHECK AND REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY (BODY ECU) (See  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ) 
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