Lexus NX: Key-off Operation Function Operates even if Operating Conditions are not Satisfied
DESCRIPTION
- When the front doors are closed, each power window regulator motor assembly can control its power window operation for approximately 43 seconds after the power switch is turned from on (IG) to off by receiving operation permission signals from the main body ECU (multiplex network body ECU).
- However, when approximately 43 seconds have elapsed, or the driver door or front passenger door is opened within approximately 43 seconds of the power switch being turned off, the power window regulator motor assembly stops operating.
- During an auto operation, when 43 seconds have passed and key-off operation is prohibited, the window continues the operation until the auto operation is completed.
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 a power window regulator motor assembly has been replaced with a new one, initialize the power window control system.
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- Recognition code registration is necessary when replacing the main body ECU (multiplex network body ECU).
-
If the main body ECU (multiplex network body ECU) is replaced, refer to Registration.
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PROCEDURE
| 1. | CHECK MANUAL UP / DOWN FUNCTION |
(a) Check that the manual up and down function using the multiplex network master switch assembly, power window regulator switch assembly and rear power window regulator switch assembly (for rear LH or RH door) can operate the power windows.
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OK:
Manual up and down function is normal.
| NG | .gif) | GO TO OTHER PROBLEM |
|
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| 2. | CHECK REMOTE UP / DOWN FUNCTION |
(a) Check that the remote up and down function using the multiplex network master switch assembly can operate all the power windows.
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OK:
Remote up and down function is normal.
| NG | | GO TO OTHER PROBLEM |
|
| 3. | CHECK KEY-OFF OPERATION FUNCTION |
(a) Check the key-off operation function.
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| Result | Proceed to |
|---|---|
| Power window can still be operated even after opening driver door or front passenger door within approximately 43 seconds of power switch being turned off | A |
| Power window can still be operated even after approximately 43 seconds have elapsed after power switch is turned off (All Doors) | B |
| Power window can still be operated even after approximately 43 seconds have elapsed after power switch is turned off (Driver door power window) | C |
| Power window can still be operated even after approximately 43 seconds have elapsed after power switch is turned off (Front passenger door power window) | D |
| Power window can still be operated even after approximately 43 seconds have elapsed after power switch is turned off (Rear LH door) | E |
| Power window can still be operated even after approximately 43 seconds have elapsed after power switch is turned off (Rear RH door) | F |
| B | | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
| C | | REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH |
| D | | REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH |
| E | | REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH |
| F | | REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH |
|
| 4. | 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 |
|---|---|---|---|---|
| FR Door Courtesy SW | Front door courtesy light switch assembly RH signal | OFF or ON | OFF: Front door RH closed ON: Front door RH open | - |
| FL Door Courtesy SW | Front door courtesy light switch assembly LH signal | OFF or ON | OFF: Front door LH closed ON: Front door LH open | - |
| Tester Display |
|---|
| FR Door Courtesy SW |
| FL Door Courtesy SW |
OK:
On the Techstream screen, ON or OFF is displayed accordingly.
| OK | | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
| NG | | GO TO LIGHTING SYSTEM |
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