Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: Back Door Courtesy Switch Circuit
DESCRIPTION
The fold seat control ECU receives switch operation signals, the driving condition signal and back door courtesy light switch assembly signal and operates the rear power seat according to these signals.
WIRING DIAGRAM
PROCEDURE
| 1. | CHECK BACK DOOR LOCK ASSEMBLY (BACK DOOR COURTESY LIGHT SWITCH) |
(a) Check that the back door lock assembly (back door courtesy light switch) turns on and off according to the back door operation.
OK:
Back door lock assembly (back door courtesy light switch) turns on and off normally according to the back door operation.
| NG | .gif) | GO TO LIGHTING SYSTEM |
|
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| 2. | CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY - FOLD SEAT CONTROL ECU AND BODY GROUND) |
(a) Disconnect the Z7 back door lock assembly connector.
(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 |
|---|---|---|
| Z7-8 (CTY) - x3-19 (BDCY) | Always | Below 1 Ω |
| Z7-7 (E) - Body ground | Always | Below 1 Ω |
| Z7-8 (CTY) or x3-19 (BDCY) - Body ground | Always | 10 kΩ or higher |
for Rear LH Seat
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| Z7-8 (CTY) - y3-19 (BDCY) | Always | Below 1 Ω |
| Z7-7 (E) - Body ground | Always | Below 1 Ω |
| Z7-8 (CTY) or y3-19 (BDCY) - Body ground | Always | 10 kΩ or higher |
| OK | | GO TO PROBLEM SYMPTOMS TABLE |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
Terminals Of Ecu
TERMINALS OF ECU CHECK FOLD SEAT CONTROL ECU RH (a) Disconnect the x3 and x4 fold seat control ECU RH connectors. (b) Measure the resistance and voltage according to the value(s) in the table below. ...
Fold Seat Switch Circuit
DESCRIPTION When the fold seat switch assembly is operated, a switch operation signal is sent to the fold seat control ECU. According to the signal received, the fold seat control ECU operates the fol ...
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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