Lexus NX: Lock Function (Entry Lock Function does not Operate Using Close &)
DESCRIPTION
If the back door does not lock when using the power back door close and lock function, there may be communication problem between the certification ECU (smart key ECU assembly) and multiplex network door ECU.
CAUTION / NOTICE / HINT
NOTICE:
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The smart access system with push-button start (for Entry Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart access system with push-button start (for Entry Function) after confirming that the communication systems are functioning properly.
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- When using the Techstream with the power switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Access. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.
- After repair, confirm that no DTCs are output.
- Check that there are no electrical key transmitter sub-assemblies in the vehicle.
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Before replacing the certification ECU (smart key ECU assembly), refer to smart access system with push-button start (for Entry Function) Precaution.
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Make sure that the electrical key transmitter sub-assembly is within the power back door close and lock function operating range when performing a back door close and lock operation.
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PROCEDURE
| 1. | CHECK OPERATION HISTORY |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Smart Access / Utility / Operation History
Body Electrical > Smart Access > Utility| Tester Display |
|---|
| Operation History |
| Parameter Name | Content |
|---|---|
| Back Door Lock & Close signal | Certification ECU (smart key ECU assembly) confirmed the back door lock & close signal. |
| Result | Proceed to |
|---|---|
| Not output | A |
| "Back Door Lock & Close signal" is output | B |
| B | .gif) | GO TO POWER BACK DOOR SYSTEM |
|
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| 2. | CHECK ENTRY BACK DOOR OPEN FUNCTION |
(a) While carrying the electrical key transmitter sub-assembly, check that the entry unlock function operates when the back door opener switch is operated.
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| Result | Proceed to |
|---|---|
| Entry back door open function operates | A |
| Entry back door open function does not operate | B |
| A | | GO TO POWER BACK DOOR SYSTEM (Ciose & Lock Function does not Operate) |
| B | | GO TO SMART ACCESS SYSTEM WITH PUSH-BUTTON START (Back Door Entry Lock and Unlock Functions do not Operate) |
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