Lexus NX: Switch Failure (B2342)
DESCRIPTION
This DTC is stored when the sliding roof drive gear sub-assembly (sliding roof ECU) detects that the map light assembly (slide roof switch) is stuck for 30 seconds or more.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B2342 | Switch Failure | sliding roof drive gear sub-assembly (sliding roof ECU) detects map light assembly (slide roof switch) is stuck for 30 seconds or more. |
|
WIRING DIAGRAM
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CAUTION / NOTICE / HINT
NOTICE:
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If the sliding roof drive gear sub-assembly (sliding roof ECU) is replaced, the sliding roof drive gear sub-assembly (sliding roof ECU) must be initialized.
Click here
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The sliding roof system uses the LIN communication system. First, confirm that there are no malfunctions in the LIN communication system. Refer to How to Proceed with Troubleshooting.
Click here
PROCEDURE
| 1. | READ VALUE USING TECHSTREAM (Switch Failure [Past]) |
(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 / Sliding Roof / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Sliding Roof > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Open Switch Failure(Past) | OPEN switch failure signal (Past) | OFF or ON | OFF: No OPEN switch failure signal (Past) ON: OPEN switch failure signal (Past) | - |
| Close Switch Failure(Past) | CLOSE switch failure signal (Past) | OFF or ON | OFF: No CLOSE switch failure signal (Past) ON: CLOSE switch failure signal (Past) | - |
| Up Switch Failure(Past) | UP switch failure signal (Past) | OFF or ON | OFF: No UP switch failure signal (Past) ON: UP switch failure signal (Past) | - |
| Down Switch Failure(Past) | DOWN switch failure signal (Past) | OFF or ON | OFF: No DOWN switch failure signal (Past) ON: DOWN switch failure signal (Past) | - |
| Open Switch Failure(Current) | OPEN switch failure signal (Current) | OFF or ON | OFF: No OPEN switch failure signal (Current) ON: OPEN switch failure signal (Current) | - |
| Close Switch Failure(Current) | CLOSE switch failure signal (Current) | OFF or ON | OFF: No CLOSE switch failure signal (Current) ON: CLOSE switch failure signal (Current) | - |
| Up Switch Failure(Current) | UP switch failure signal (Current) | OFF or ON | OFF: No UP switch failure signal (Current) ON: UP switch failure signal (Current) | - |
| Down Switch Failure(Current) | DOWN switch failure signal (Current) | OFF or ON | OFF: No DOWN switch failure signal (Current) ON: DOWN switch failure signal (Current) | - |
| Tester Display |
|---|
| Open Switch Failure(Past) |
| Close Switch Failure(Past) |
| Up Switch Failure(Past) |
| Down Switch Failure(Past) |
| Open Switch Failure(Current) |
| Close Switch Failure(Current) |
| Up Switch Failure(Current) |
| Down Switch Failure(Current) |
OK:
OFF appears on the Techstream screen.
| Result | Proceed to |
|---|---|
| All items are displayed "OFF" | A |
| In part or in whole item displayed "ON" | B |
| A | .gif) | REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY |
|
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| 2. | INSPECT MAP LIGHT ASSEMBLY |
(a) Remove the map light assembly (slide roof switch).
Click here
(b) Inspect the map light assembly (slide roof switch).
Click here
| NG | | REPLACE MAP LIGHT ASSEMBLY |
|
| 3. | CHECK HARNESS AND CONNECTOR (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY - MAP LIGHT ASSEMBLY AND BODY GROUND) |
(a) Disconnect the T9 sliding roof drive gear sub-assembly connector.
(b) Disconnect the T6 map light assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| T9-4 (UP) - T6-23 (UP) | Always | Below 1 Ω |
| T9-4 (UP) or T6-23 (UP) - Body ground | Always | 10 kΩ or higher |
| T9-5 (CLS) - T6-12 (CLS) | Always | Below 1 Ω |
| T9-5 (CLS) or T6-12 (CLS) - Body ground | Always | 10 kΩ or higher |
| T9-6 (DWN) - T6-24 (DOWN) | Always | Below 1 Ω |
| T9-6 (DWN) or T6-24 (DOWN) - Body ground | Always | 10 kΩ or higher |
| T9-7 (OPN) - T6-11 (OPN) | Always | Below 1 Ω |
| T9-7 (OPN) or T6-11 (OPN) - Body ground | Always | 10 kΩ or higher |
| T9-12 (E) - Body ground | Always | Below 1 Ω |
| T6-19 (GND) - Body ground | Always | Below 1 Ω |
| OK | | REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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Removal
REMOVAL CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH and LH sides.
The procedure listed below is for the LH side.
PROCEDURE 1. REMOVE REAR WHEEL Click here 2. REMOVE REAR SUSPENSION ARM COVER LH Click here 3. DISCONNECT REAR SPEED SENSOR LH (a) w/ AVS: Click here (b)
