Lexus NX: Front Passenger Side Power Window Auto Up / Down Function does not Operate with Front Passenger Side Power Window Switch
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 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 "P Window Auto Up" and "P 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 front power window regulator motor assembly RH 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 power window regulator switch assembly at the auto up position, and opened manually by pushing down the power window regulator switch assembly.
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PROCEDURE
| 1. | 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 Auto SW | Front passenger door power window auto switch signal | OFF or ON | OFF: Front passenger door power window auto switch not being operated ON: Front passenger door power window auto switch being operated | - |
| Tester Display |
|---|
| P 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 FRONT PASSENGER DOOR) |
(a) Initialize the front power window regulator motor assembly RH.
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|
| 3. | CHECK POWER WINDOW CONTROL SYSTEM (AUTO UP / DOWN FUNCTION) |
(a) Check that the front passenger door power window moves when the auto up and down function of the power window regulator switch assembly is operated.
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OK:
Front passenger door auto up and down function is normal.
| OK | | END (PROBLEM DUE TO INITIALIZATION FAILURE) |
| 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) |
(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 |
|---|---|---|
| L11-8 (AUTO) - L2-4 (AUTO) | Always | Below 1 Ω |
| L11-8 (AUTO) or L2-4 (AUTO) - Body ground | Always | 10 kΩ or higher |
| OK | | REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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