Lexus ES: Switch Failure (B2342)
DESCRIPTION
This DTC is stored when the sliding roof ECU (sliding roof drive gear assembly) detects that the panoramic moon roof switch (map light sub-assembly) is stuck for 30 seconds or more.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B2342 | Switch Failure | Sliding roof ECU (sliding roof drive gear assembly) detects panoramic moon roof switch (map light sub-assembly) is stuck for 30 seconds or more. |
|
WIRING DIAGRAM
Refer to DTC B2341.
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CAUTION / NOTICE / HINT
NOTICE:
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If the sliding roof ECU (sliding roof drive gear assembly) is removed and reinstalled or replaced, the sliding roof ECU (sliding roof drive gear assembly) must be initialized.
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The panoramic moon roof system uses the CAN and LIN communication system. First, confirm that there are no malfunctions in the CAN and LIN communication system. Refer to How to Proceed with Troubleshooting.
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- DTC B2342 is stored in the sliding roof ECU (sliding roof drive gear assembly).
PROCEDURE
| 1. | CHECK FOR DTC |
(a) Clear the DTCs.
Body Electrical > Sliding Roof > Clear DTCs(b) Check for DTCs.
Body Electrical > Sliding Roof > Trouble CodesOK:
DTC B2342 is not output.
| OK | .gif) | END (DUE TO SWITCH BEING OPERATED FOR 30 SECONDS OR MORE) |
|
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| 2. | READ VALUE USING TECHSTREAM (SLIDING ROOF) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine 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) | Sliding roof open switch stuck signal (Past) | OFF or ON | OFF: No sliding roof switch stuck signal (Past) ON: Sliding roof switch stuck signal (Past) | - |
| Close Switch Failure(Past) | Sliding roof close switch stuck signal (Past) | OFF or ON | OFF: No sliding roof switch stuck signal (Past) ON: Sliding roof switch stuck signal (Past) | - |
| Up Switch Failure(Past) | Roof sunshade open switch stuck signal (Past) | OFF or ON | OFF: No roof sunshade switch stuck signal (Past) ON: Roof sunshade switch stuck signal (Past) | - |
| Down Switch Failure(Past) | Roof sunshade close switch stuck signal (Past) | OFF or ON | OFF: No roof sunshade switch stuck signal (Past) ON: Roof sunshade switch stuck signal (Past) | - |
| Open Switch Failure(Current) | Sliding roof open switch stuck signal (Current) | OFF or ON | OFF: No sliding roof switch stuck signal (Current) ON: Sliding roof switch stuck signal (Current) | - |
| Close Switch Failure(Current) | Sliding roof close switch stuck signal (Current) | OFF or ON | OFF: No roof sunshade switch stuck signal (Current) ON: Roof sunshade switch stuck signal (Current) | - |
| Up Switch Failure(Current) | Roof sunshade open switch stuck signal (Current) | OFF or ON | OFF: No roof sunshade switch stuck signal (Current) ON: Roof sunshade switch stuck signal (Current) | - |
| Down Switch Failure(Current) | Roof sunshade close switch stuck signal (Current) | OFF or ON | OFF: No roof sunshade switch stuck signal (Current) ON: Roof sunshade switch stuck 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.
| OK | | REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY) |
|
| 3. | CHECK HARNESS AND CONNECTOR (SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY) - PANORAMIC MOON ROOF SWITCH (MAP LIGHT SUB-ASSEMBLY)) |
(a) Disconnect the Q1 sliding roof ECU (sliding roof drive gear assembly) connector.
(b) Disconnect the P13 panoramic moon roof switch (map light sub-assembly) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| Q1-10 (OPN) or P13-11 (OPN) - Body ground | Always | 10 kΩ or higher |
| Q1-8 (CLS) or P13-12 (CLS) - Body ground | Always | 10 kΩ or higher |
| Q1-4 (TILT) or P13-7 (B) - Body ground | Always | 10 kΩ or higher |
| Q1-5 (OPN) or P13-23 (UP) - Body ground | Always | 10 kΩ or higher |
| Q1-9 (CLS) or P13-24 (DOWN) - Body ground | Always | 10 kΩ or higher |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 4. | INSPECT PANORAMIC MOON ROOF SWITCH (MAP LIGHT SUB-ASSEMBLY) |
(a) Remove the panoramic moon roof switch (map light sub-assembly).
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(b) Inspect the panoramic moon roof switch (map light sub-assembly).
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| OK | | REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY) |
| NG | | REPLACE PANORAMIC MOON ROOF SWITCH (MAP LIGHT SUB-ASSEMBLY) |
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SEE MORE:
Inspection
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Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT:
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspect
