Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Power Back Door does not Operate Using Outside Switch
DESCRIPTION
The multiplex network door ECU detects the status of the power back door control switch.
If the power back door does not operate when the power back door control switch is operated, there may be a malfunction in the power back door control switch circuit.
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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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 / Master Switch / 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 |
|---|---|---|---|---|
| PBD Close SW | Back door control switch signal | OFF or ON | OFF: Back door control switch not pressed ON: Back door control switch pressed | - |
| Tester Display |
|---|
| PBD Close SW |
OK:
The display is as specified in the normal condition column.
| OK | .gif) | REPLACE MULTIPLEX NETWORK DOOR ECU |
|
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| 2. | INSPECT BACK DOOR CONTROL SWITCH |
(a) Remove the back door control switch.
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(b) Inspect the back door control switch.
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| NG | | REPLACE BACK DOOR CONTROL SWITCH |
|
| 3. | CHECK HARNESS AND CONNECTOR (BACK 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 |
|---|---|---|
| Z29-5 (CLS) - Z16-8 (BDDN) | Always | Below 1 Ω |
| Z29-2 (E) - Body ground | Always | Below 1 Ω |
| Z29-5 (CLS) or Z16-8 (BDDN) - 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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