Lexus NX: AUTO Power Retract Mirrors do not operate
DESCRIPTION
When the outer mirror switch assembly is set to AUTO (neutral position), an AUTO signal is detected by the main body ECU (multiplex network body ECU). When locking and unlocking all doors with the power switch off, the main body ECU (multiplex network body ECU) sends deploy/retract signals to the outer mirror control ECU assembly via CAN communication. The outer mirror control ECU assembly deploys and retracts the outer rear view mirror assembly based on the received signals.
WIRING DIAGRAM
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CAUTION / NOTICE / HINT
NOTICE:
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First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no CAN communication malfunctions before troubleshooting this problem.
Click here
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If the main body ECU (multiplex network body ECU) is replaced, refer to Registration.
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PROCEDURE
| 1. | CHECK POWER RETRACT MIRROR FUNCTION |
(a) Check power retract mirror function.
Click here
OK:
Power retract mirror function is normal.
| NG | .gif) | GO TO OTHER FLOWCHART (Power Retractable Mirrors do not Operate with Power Retract Mirror Switch) |
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| 2. | 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 |
|
| 3. | 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) |
|
| 4. | READ VALUE USING TECHSTREAM (MIRROR RETRACT) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Main Body > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Outer Mirror Fold SW | Mirror retract switch signal | OFF or ON | OFF: Mirror retract switch not in retract position ON: Mirror retract switch in retract position | - |
| Outer Mirror Return SW | Mirror retract switch signal | OFF or ON | OFF: Mirror return switch not in retract position ON: Mirror return switch in retract position | - |
| Tester Display |
|---|
| Outer Mirror Fold SW |
| Outer Mirror Return SW |
OK:
On the Techstream screen, ON or OFF is displayed for each item according to the table above.
| OK | | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
|
| 5. | INSPECT OUTER MIRROR SWITCH ASSEMBLY (MIRROR RETRACTOR SWITCH) |
(a) Remove the outer mirror switch assembly.
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(b) Inspect the outer mirror switch assembly.
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| NG | | REPLACE OUTER MIRROR SWITCH ASSEMBLY |
|
| 6. | CHECK HARNESS AND CONNECTOR (OUTER MIRROR SWITCH ASSEMBLY - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] AND BODY GROUND) |
(a) Disconnect the M13 outer mirror switch assembly connector.
(b) Disconnect the I47 main body ECU (multiplex network body ECU) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| M13-8 (MR) - I47-15 (RTR) | Always | Below 1 Ω |
| M13-11 (MF) - I47-14 (RET) | Always | Below 1 Ω |
| M13-10 (E) - Body ground | Always | Below 1 Ω |
| M13-8 (MR) or I47-15 (RTR) - Body ground | Always | 10 kΩ or higher |
| M13-11 (MF) or I47-14 (RET) - Body ground | Always | 10 kΩ or higher |
| OK | | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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