Lexus NX: Rear Power Window RH Auto Up / Down Function does not Operate with Rear Power Window Switch RH
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 RH has been replaced with a new one, initialize the power window control system.
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-
Check that the "RR Window Auto Up" and "RR 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 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 rear power window regulator switch assembly (for rear RH door) at the auto up position, and opened manually by pushing down the rear power window regulator switch assembly (for rear RH door).
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PROCEDURE
| 1. | READ VALUE USING TECHSTREAM (RR-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 |
|---|---|---|---|---|
| RR Door P/W Auto SW | Rear RH door power window auto switch signal | OFF or ON | OFF: Rear RH door power window auto switch not being operated ON: Rear RH door power window auto switch being operated | - |
| Tester Display |
|---|
| RR 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 RH DOOR) |
(a) Initialize the rear power window regulator motor assembly RH.
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|
| 3. | CHECK POWER WINDOW CONTROL SYSTEM (AUTO UP / DOWN FUNCTION) |
(a) Check that the rear RH door power window moves when the auto up and down function of the rear power window regulator switch assembly (for rear RH door) is operated.
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OK:
Rear RH door auto up and down function is normal.
| OK | | END (PROBLEM DUE TO INITIALIZATION FAILURE) |
| NG | | REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH |
| 4. | INSPECT REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (FOR REAR RH DOOR) |
(a) Remove the rear power window regulator switch assembly (for rear RH door).
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(b) Inspect the rear power window regulator switch assembly (for rear RH door).
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| NG | | REPLACE REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (FOR REAR RH DOOR) |
|
| 5. | CHECK HARNESS AND CONNECTOR (REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY [FOR REAR RH DOOR] - REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH) |
(a) Disconnect the N1 rear power window regulator switch assembly (for rear RH door) connector.
(b) Disconnect the N2 rear 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 |
|---|---|---|
| N1-8 (AUTO) - N2-4 (AUTO) | Always | Below 1 Ω |
| N1-8 (AUTO) or N2-4 (AUTO) - Body ground | Always | 10 kΩ or higher |
| OK | | REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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