Lexus NX: Rear Power Window LH Auto Up / Down Function does not Operate with Rear Power Window Switch LH
DESCRIPTION
If the manual up and down function operates normally but the auto up and down function does not, then fail-safe mode may be functioning.
If power window initialization has not been performed, the auto up and down function will not operate.
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WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
If the rear power window regulator motor assembly LH has been replaced with a new one, initialize the power window control system.
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Check that the "RL Window Auto Up" and "RL Window Auto Down" power window control system customize settings are "ON" before proceeding with work.
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- After the catch protection function operates, the auto operation is not performed the first time auto up is performed. All auto up operations performed after the first operate normally.
HINT:
If the pulse sensor built into the rear power window regulator motor assembly LH is malfunctioning, the power window control system enters fail-safe mode. The remote up and down and auto up and down functions cannot be operated during fail-safe mode. However, the power window can be closed by holding the rear power window regulator switch assembly (for rear LH door) at the auto up position, and opened manually by pushing down the rear power window regulator switch assembly (for rear LH door).
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PROCEDURE
| 1. | READ VALUE USING TECHSTREAM (RL-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 |
|---|---|---|---|---|
| RL Door P/W Auto SW | Rear LH door power window auto switch signal | OFF or ON | OFF: Rear LH door power window auto switch not being operated ON: Rear LH door power window auto switch being operated | - |
| Tester Display |
|---|
| RL Door P/W Auto SW |
OK:
On the Techstream screen, ON or OFF is displayed accordingly.
| NG | .gif) | GO TO STEP 4 |
|
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| 2. | PERFORM INITIALIZATION (FOR REAR LH DOOR) |
(a) Initialize the rear power window regulator motor assembly LH.
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|
| 3. | CHECK POWER WINDOW CONTROL SYSTEM (AUTO UP / DOWN FUNCTION) |
(a) Check that the rear LH door power window moves when the auto up and down function of the rear power window regulator switch assembly (for rear LH door) is operated.
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OK:
Rear LH door auto up and down function is normal.
| OK | | END (PROBLEM DUE TO INITIALIZATION FAILURE) |
| NG | | REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH |
| 4. | INSPECT REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (FOR REAR LH DOOR) |
(a) Remove the rear power window regulator switch assembly (for rear LH door).
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(b) Inspect the rear power window regulator switch assembly (for rear LH door).
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| NG | | REPLACE REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (FOR REAR LH DOOR) |
|
| 5. | CHECK HARNESS AND CONNECTOR (REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY [FOR REAR LH DOOR] - REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH) |
(a) Disconnect the O1 rear power window regulator switch assembly (for rear LH door) connector.
(b) Disconnect the O2 rear power window regulator motor assembly LH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| O1-8 (AUTO) - O2-4 (AUTO) | Always | Below 1 Ω |
| O1-8 (AUTO) or O2-4 (AUTO) - Body ground | Always | 10 kΩ or higher |
| OK | | REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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Components
COMPONENTS ILLUSTRATION *1 HEADLIGHT ASSEMBLY LH - - N*m (kgf*cm, ft.*lbf): Specified torque - - ILLUSTRATION *A w/ Headlight ECU - - *1 FRONT SIDE MAKER LIGHT BULB *2 FRONT SIDE MARKER LIGHT SOCKET *3 HEADLIGHT ECU SUB-ASSEMBLY LH *4 HEADLIGHT G
Operation Check
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