Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: AUTO Power Retract Mirrors do not operate
DESCRIPTION
The multiplex network master switch assembly sends the auto retractable outer mirror switch signal to the main body ECU (multiplex network body ECU) via LIN communication. The main body ECU (multiplex network body ECU) sends the auto retract/return signal to the outer mirror control ECU assemblies via CAN communication, which then controls the mirrors.
When the outer mirror control ECU assemblies receive a door lock output signal from the main body ECU (multiplex network body ECU) while the auto retractable outer mirror switch is on, the outer mirror control ECU assemblies operate the retract motors built into the outer rear view mirror assemblies to retract or return the outer rear view mirror assemblies.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
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The power mirror control system (w/o Memory) uses the CAN communication system and LIN communication system. Inspect the communication functions by following How to Proceed with Troubleshooting. Troubleshoot the power window control system after confirming that the communication systems are functioning properly.
Click here
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Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
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PROCEDURE
| 1. | CHECK POWER RETRACT MIRROR FUNCTION |
(a) Check the power retract mirror function.
Click here
OK:
Power retract mirror function operates normally.
| NG | .gif) | GO TO OTHER DIAGNOSIS PROCEDURE (Power Retractable Mirrors do not Operate with Power Retract Mirror Switch) |
|
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| 2. | CHECK POWER DOOR LOCK CONTROL SYSTEM |
(a) Check the power door lock control system.
Click here
OK:
Power door lock control system is normal.
| NG | | GO TO POWER DOOR LOCK CONTROL SYSTEM |
|
| 3. | CHECK WIRELESS DOOR LOCK CONTROL SYSTEM |
(a) Check the wireless door lock control system.
Click here
OK:
Wireless door lock control system is normal.
| NG | | GO TO WIRELESS DOOR LOCK CONTROL SYSTEM |
|
| 4. | CHECK SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Entry Function) |
(a) Check the smart access system with push-button start (for Entry Function).
Click here
OK:
smart access system with push-button start (for Entry Function) is normal.
| NG | | GO TO SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Entry Function) |
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| 5. | 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 > Master Switch > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Auto Mirror SW | Auto retractable outer mirror switch signal | OFF or ON | OFF: Auto retractable outer mirror switch off ON: Auto retractable outer mirror switch on | - |
| Tester Display |
|---|
| Auto Mirror SW |
OK:
On the Techstream screen, ON or OFF is displayed accordingly.
| OK | | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
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| 6. | REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY |
(a) Temporarily replace the multiplex network master switch assembly with a new or known good one.
Click here
|
| 7. | CHECK AUTO POWER RETRACT MIRROR FUNCTION |
(a) Check the auto power retract mirror function.
Click here
OK:
Auto power retract mirror function operates normally.
| OK | | END (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY WAS DEFECTIVE) |
| NG | | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
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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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