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.
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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).
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(b) Inspect the map light assembly (slide roof switch).
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| 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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