Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Lock Function does not Operate (Close &)
DESCRIPTION
The door control switch signal is sent to the multiplex network door ECU. If the power back door system does not operate when the door control switch is operated, the door control switch circuit may be malfunctioning.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
If the replacement, removal and installation of the multiplex network door ECU or disconnection of the connectors of the multiplex network door ECU has been performed, initialize the power back door system.
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-
Check the smart access system (for Entry Function) first before troubleshooting the power back door system.
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PROCEDURE
| 1. | READ VALUE USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Back Door / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Back Door > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Close and Lock SW | Door control switch signal | OFF or ON | OFF: Door control switch not pushed ON: Door control switch pushed | - |
| Tester Display |
|---|
| Close and Lock SW |
OK:
The display is as specified in the normal condition column.
| OK |  | REPLACE MULTIPLEX NETWORK DOOR ECU |
|
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| 2. | INSPECT DOOR CONTROL SWITCH |
(a) Remove the door control switch.
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(b) Inspect the door control switch.
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| NG | | REPLACE DOOR CONTROL SWITCH |
|
| 3. | CHECK HARNESS AND CONNECTOR (DOOR CONTROL SWITCH - MULTIPLEX NETWORK DOOR ECU AND BODY GROUND) |
(a) Disconnect the Z16 multiplex network door ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| Z30-5 (CLLS) - Z16-10 (CLSW) | Always | Below 1 Ω |
| Z30-2 (E) - Body ground | Always | Below 1 Ω |
| Z30-5 (CLLS) or Z16-10 (CLSW) - Body ground | Always | 10 kΩ or higher |
| OK | | REPLACE MULTIPLEX NETWORK DOOR ECU |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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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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