Lexus NX: Power Retractable Mirrors do not Operate with Power Retract Mirror Switch
DESCRIPTION
When the outer mirror switch assembly mirror retract switch is operated, deploy/retract signals are sent to the main body ECU (multiplex network body ECU). 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
CAUTION / NOTICE / HINT
NOTICE:
-
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.
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If the main body ECU (multiplex network body ECU) is replaced, refer to Registration.
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PROCEDURE
| 1. | READ VALUE USING TECHSTREAM (OUTER MIRROR FOLD SW) |
(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 | - |
| Tester Display |
|---|
| Outer Mirror Fold SW |
OK:
On the Techstream screen, ON or OFF is displayed for each item according to the table above.
| NG | .gif) | GO TO STEP 5 |
|
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| 2. | CHECK MALFUNCTIONING PARTS |
(a) Check the malfunctioning parts.
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| Result | Proceed to |
|---|---|
| Both mirrors are malfunctioning | A |
| LH side mirror is malfunctioning | B |
| RH side mirror is malfunctioning | C |
| A | | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
| C | | GO TO STEP 4 |
|
| 3. | INSPECT OUTER MIRROR RETRACTOR LH (POWER RETRACT FUNCTION) |
(a) Remove the outer rear view mirror assembly LH.
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(b) Inspect the outer mirror retractor LH.
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| OK | | REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY LH |
| NG | | REPLACE OUTER MIRROR RETRACTOR LH |
| 4. | INSPECT OUTER MIRROR RETRACTOR RH (POWER RETRACT FUNCTION) |
(a) Remove the outer rear view mirror assembly RH.
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(b) Inspect the outer mirror retractor RH.
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| OK | | REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY RH |
| NG | | REPLACE OUTER MIRROR RETRACTOR RH |
| 5. | INSPECT OUTER MIRROR SWITCH ASSEMBLY (MIRROR RETRACT 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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