Lexus NX: Back Door Closer Operation Malfunction (B2250)
DESCRIPTION
The multiplex network door ECU receives signals from the latch switch, initial switch, pawl switch and back door courtesy switch, which are built into the back door lock assembly. Based on these switch signals, the latch position of the back door lock assembly is determined.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B2250 | Back Door Closer Operation Malfunction | While the back door closer is operating, a malfunction is detected in position information from the initial switch within a specified amount of time. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following procedure.
-
If the replacement, removal and installation of the multiplex network door ECU or disconnection of the connectors of the multiplex network door ECU has been performed, initialize the power back door system.
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PROCEDURE
| 1. | READ VALUE USING TECHSTREAM |
(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 |
|---|---|---|---|---|
| Closer Position SW | Initial switch signal | ON or OFF | ON: Back door lock center gear in center position OFF: Back door lock center gear not in center position | Refer to "CONSTRUCTION AND OPERATION"* |
*: Refer to "CONSTRUCTION AND OPERATION"
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| Tester Display |
|---|
| Closer Position SW |
OK:
The display is as specified in the normal condition column.
| OK | .gif) | REPLACE MULTIPLEX NETWORK DOOR ECU |
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| 2. | INSPECT BACK DOOR LOCK ASSEMBLY |
(a) Remove the back door lock assembly.
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(b) Inspect the back door lock assembly.
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| NG | | REPLACE BACK DOOR LOCK ASSEMBLY |
|
| 3. | CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY - MULTIPLEX NETWORK DOOR ECU AND BODY GROUND) |
(a) Disconnect the Y12 back door lock assembly connector.
(b) Disconnect the Y26 multiplex network door ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| Y12-6 (OPN) - Y26-7 (POS) | Always | Below 1 Ω |
| Y12-7 (E) - Body ground | Always | Below 1 Ω |
| Y12-6 (OPN) or Y26-7 (POS) - Body ground | Always | 10 kΩ or higher |
| OK | | REPLACE MULTIPLEX NETWORK DOOR ECU |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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