Lexus NX: Rear Door RH ECU Communication Stop (B2323)
DESCRIPTION
This DTC is output when LIN communication between the rear power window regulator motor assembly RH and main body ECU (multiplex network body ECU) stops for 10 seconds or more.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B2323 | Rear Door RH ECU Communication Stop | No communication between rear power window regulator motor assembly RH and main body ECU (multiplex network body ECU) for 10 seconds or more |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
When using the Techstream with the power switch off to troubleshoot:
Connect the Techstream to the vehicle and turn a courtesy light switch on and off at 1.5 second intervals until communication between the Techstream and vehicle begins.
- Inspect the fuses for circuits related to this system before performing the following procedure.
-
When a power window regulator motor assembly is replaced or removed and reinstalled, it must be initialized.
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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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HINT:
DTC B2325 is output when the communication between all of the following components and main body ECU (multiplex network body ECU) stops.
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PROCEDURE
| 1. | CLEAR DTC |
(a) Clear the DTCs.
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|
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| 2. | CHECK FOR DTC |
(a) Check for DTCs.
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| DTC B2323 is not output | .gif) | USE SIMULATION METHOD TO CHECK |
|
| 3. | CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH) |
(a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
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(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 |
|---|---|---|
| A-16 (LIN2) - N2-9 (LIN) | Always | Below 1 Ω |
| A-16 (LIN2) - Body ground | Always | 10 kΩ or higher |
| NG | | GO TO STEP 7 |
|
| 4. | CHECK HARNESS AND CONNECTOR (REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH - BATTERY AND BODY GROUND) |
| *a | Front view of wire harness connector (to Rear Power Window Regulator Motor Assembly RH) |
(a) Disconnect the rear power window regulator motor assembly RH connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| N2-1 (GND) - Body ground | Always | Below 1 Ω |
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Switch Condition | Specified Condition |
|---|---|---|
| N2-2 (B) - Body ground | Power switch off | 11 to 14 V |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 5. | REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH |
(a) Temporarily replace the rear power window regulator motor assembly RH with a new or normally functioning one.
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(b) Clear the DTCs.
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|
| 6. | CHECK FOR DTC |
(a) Check for DTCs.
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| DTC B2323 is not output | | END (REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH IS DEFECTIVE) |
| DTC B2323 is output | | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
| 7. | CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH) |
(a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
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(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 |
|---|---|---|
| 4D-41 - N2-9 (LIN) | Always | Below 1 Ω |
| 4D-41 - Body ground | Always | 10 kΩ or higher |
| OK | | REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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