Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: Rear Power Seat Switch Circuit

DESCRIPTION

HINT:

The rear power seat switch is a collective term for the rear power seat switch RH and the rear power seat switch LH.

When the rear power seat switch is operated, a recline signal is sent to the fold seat control ECU. The fold seat control ECU operates the reclining motor according to the received signal.

WIRING DIAGRAM

PROCEDURE

1.

INSPECT REAR POWER SEAT SWITCH

(a) Remove the rear power seat switch.

Click here

(b) Inspect the rear power seat switch.

Click here

NG

REPLACE REAR POWER SEAT SWITCH

OK

2.

CHECK HARNESS AND CONNECTOR (REAR POWER SEAT SWITCH - FOLD SEAT CONTROL ECU AND BODY GROUND)

(a) Disconnect the x6*1 or y5*2 rear power seat switch connector.

  • *1: for Rear RH Seat
  • *2: for Rear LH Seat

(b) Disconnect the x3*1 or y3*2 fold seat control ECU connector.

  • *1: for Rear RH Seat
  • *2: for Rear LH Seat

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

Standard Resistance:

for Rear RH Seat

Tester Connection

Condition

Specified Condition

x6-3 (FLDR) - x3-12 (RCLF)

Always

Below 1 Ω

x6-3 (FLDR) or x3-12 (RCLF) - Body ground

Always

10 kΩ or higher

x6-2 (RTNR) - x3-7 (RCLR)

Always

Below 1 Ω

x6-2 (RTNR) or x3-7 (RCLR) - Body ground

Always

10 kΩ or higher

x6-7 (E) - Body ground

Always

Below 1 Ω

for Rear LH Seat

Tester Connection

Condition

Specified Condition

y5-2 (FLDL) - y3-12 (RCLF)

Always

Below 1 Ω

y5-2 (FLDL) or y3-12 (RCLF) - Body ground

Always

10 kΩ or higher

y5-3 (RTNL) - y3-7 (RCLR)

Always

Below 1 Ω

y5-3 (RTNL) or y3-7 (RCLR) - Body ground

Always

10 kΩ or higher

y5-7 (E) - Body ground

Always

Below 1 Ω

OK

GO TO PROBLEM SYMPTOMS TABLE

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

    Reclining Motor Circuit
    DESCRIPTION HINT: The rear power seat switch is a collective term for the rear power seat switch RH and the rear power seat switch LH. The rear seatback frame sub-assembly is a collective term fo ...

    Rear Power Seat Control System(for Third Row)
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