Lexus NX: Front Passenger Side Power Window does not Operate with Front Passenger Side Power Window Switch
DESCRIPTION
When the power switch is on (IG), the front power window regulator motor assembly RH is operated by the power window regulator switch assembly. The front power window regulator motor assembly RH has motor, regulator and ECU functions.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
The power window control system uses the LIN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the power window control system after confirming that the communication system is functioning properly.
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If the front power window regulator motor assembly RH has been replaced with a new one, initialize the power window control system.
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- Check that the window lock switch is off before performing the following procedure.
- Inspect the fuses for circuits related to this system before performing the following procedure.
- Recognition code registration is necessary when replacing the main body ECU (multiplex network body ECU).
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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 (MAIN BODY) |
(a) Read the Data List according to the display on the Techstream.
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| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Communication P-Door Motor | Connection status between power window regulator motor assembly LH (for front passenger door) and main body ECU (multiplex network body ECU) | STOP or OK | STOP: Communication stopped OK: Normal communication | - |
| Tester Display |
|---|
| Communication P-Door Motor |
OK:
On the Techstream screen, OK is displayed.
| NG | .gif) | GO TO LIN COMMUNICATION SYSTEM |
|
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| 2. | READ VALUE USING TECHSTREAM (P-DOOR MOTOR) |
(a) Read the Data List according to the display on the Techstream.
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| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| P Door P/W Up SW | Front passenger door power window manual up switch signal | OFF or ON | OFF: Front passenger door power window manual up switch not being operated ON: Front passenger door power window manual up switch being operated | - |
| P Door P/W Down SW | Front passenger door power window manual down switch signal | OFF or ON | OFF: Front passenger door power window manual down switch not being operated ON: Front passenger door power window manual down switch being operated | - |
| Tester Display |
|---|
| P Door P/W Up SW |
| P Door P/W Down SW |
OK:
On the Techstream screen, ON or OFF is displayed accordingly.
| NG | | GO TO STEP 4 |
|
| 3. | PERFORM ACTIVE TEST USING TECHSTREAM (P-DOOR MOTOR) |
(a) Perform the Active Test according to the display on the Techstream.
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CAUTION:
Be careful to avoid injuries as this test causes vehicle parts to move. During the Active Test, the jam protection function will not operate.
Body Electrical > P-Door Motor > Active Test| Tester Display | Measurement Item | Control Range | Diagnostic Note |
|---|---|---|---|
| Power Window | Power window | OFF / DOWN / UP | - |
| Tester Display |
|---|
| Power Window |
HINT:
Up and down movement does not occur if the arrow is not pressed and held.
OK:
Front passenger door power window operates normally.
| OK | | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
| NG | | REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH |
| 4. | INSPECT POWER WINDOW REGULATOR SWITCH ASSEMBLY |
(a) Remove the power window regulator switch assembly.
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(b) Inspect the power window regulator switch assembly.
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| NG | | REPLACE POWER WINDOW REGULATOR SWITCH ASSEMBLY |
|
| 5. | CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR SWITCH ASSEMBLY - FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH AND BODY GROUND) |
(a) Disconnect the L11 power window regulator switch assembly connector.
(b) Disconnect the L2 front power window regulator motor assembly RH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| L11-5 (UP) - L2-10 (UP) | Always | Below 1 Ω |
| L11-4 (DOWN) - L2-7 (DOWN) | Always | Below 1 Ω |
| L11-7 (GND) - Body ground | Always | Below 1 Ω |
| L11-5 (UP) or L2-10 (UP) - Body ground | Always | 10 kΩ or higher |
| L11-4 (DOWN) or L2-7 (DOWN) - Body ground | Always | 10 kΩ or higher |
| OK | | REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
READ NEXT:
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SEE MORE:
Vehicle Control History
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Removal
REMOVAL PROCEDURE 1. REMOVE DECK BOARD ASSEMBLY Click here 2. REMOVE NO. 3 DECK BOARD SUB-ASSEMBLY Click here 3. REMOVE REAR DECK FLOOR BOX Click here 4. REMOVE DECK FLOOR BOX LH Click here 5. PRECAUTION CAUTION: Be sure to read Precaution thoroughly before serving. Click here NOTICE: Afte
