DESCRIPTION
When the sliding roof ECU (sliding roof drive gear sub-assembly) detects a motor malfunction and the sliding roof operation is stopped, DTC B2341 is stored.
When the sliding roof ECU (sliding roof drive gear sub-assembly) detects a gear position malfunction and the sliding roof operation is stopped, DTC B2344 is stored.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
---|---|---|---|
B2341 | Sensor (Motor) Failure | Sensor (motor) failure (The sliding roof ECU (sliding roof drive gear sub-assembly) enters fail-safe mode due to a problem with the motor) |
|
B2344 | Position Failure | Position failure (The sliding roof ECU (sliding roof drive gear sub-assembly) enters fail-safe mode due to a problem with the gear position) |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Click here
Click here
PROCEDURE
1. | CHECK SLIDING ROOF OPERATION |
(a) Check the sliding roof auto operation.
Click here
OK:
Auto operation operates normally.
NG | GO TO STEP 3 |
|
2. | CHECK DTC OUTPUT |
(a) Clear the DTCs.
Click here
Body Electrical > Sliding Roof > Clear DTCs(b) Check for DTCs.
Body Electrical > Sliding Roof > Trouble CodesOK:
DTCs B2341 and B2344 are not output.
OK | USE SIMULATION METHOD TO CHECK |
NG | REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) |
3. | INITIALIZE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) |
(a) Check that the sliding roof ECU (sliding roof drive gear sub-assembly) can be initialized.
Click here
OK:
Sliding roof ECU (sliding roof drive gear sub-assembly) can be initialized.
NG | GO TO STEP 5 |
|
4. | CHECK DTC OUTPUT |
(a) Clear the DTCs.
Click here
Body Electrical > Sliding Roof > Clear DTCs(b) Check for DTCs.
Body Electrical > Sliding Roof > Trouble CodesOK:
DTCs B2341 and B2344 are not output.
OK | END (MALFUNCTION DUE TO INITIALIZATION FAILURE) |
NG | REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) |
5. | CHECK HARNESS AND CONNECTOR (SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) - SLIDING ROOF SWITCH (MAP LIGHT ASSEMBLY) AND BODY GROUND) |
(a) Disconnect the U11 sliding roof switch (map light assembly) connector.
(b) Disconnect the U2 sliding roof ECU (sliding roof drive gear sub-assembly) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
U2-8 (CLS) - U11-12 (CLS) | Always | Below 1 Ω |
U2-8 (CLS) or U11-12 (CLS) - Body ground | Always | 10 kΩ or higher |
U2-10 (OPN) - U11-11 (OPN) | Always | Below 1 Ω |
U2-10 (OPN) or U11-11 (OPN) - Body ground | Always | 10 kΩ or higher |
U2-9 (CLS) - U11-24 (DOWN) | Always | Below 1 Ω |
U2-9 (CLS) or U11-24 (DOWN) - Body ground | Always | 10 kΩ or higher |
U2-5 (OPN) - U11-23 (UP) | Always | Below 1 Ω |
U2-5 (OPN) or U11-23 (UP) - Body ground | Always | 10 kΩ or higher |
U11-19 (GND) - Body ground | Always | Below 1 Ω |
U2-2 (E) - Body ground | Always | Below 1 Ω |
NG | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
6. | INSPECT SLIDING ROOF SWITCH (MAP LIGHT ASSEMBLY) |
(a) Remove the sliding roof switch (map light assembly).
Click here
(b) Inspect the sliding roof switch (map light assembly).
Click here
OK | REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) |
NG | REPLACE SLIDING ROOF SWITCH (MAP LIGHT ASSEMBLY) |
Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Back Door Closer Ecu: Installation
INSTALLATION PROCEDURE 1. INSTALL MULTIPLEX NETWORK DOOR ECU (a) Engage the 2 guides to install the multiplex network door ECU with the 2 bolts. Torque: 5.5 N·m {56 kgf·cm, 49 in·lbf} (b) Connect the 2 connectors. 2. INSTALL BACK DOOR TRIM PANEL ASSEMBLY (w/o Rear No. 2 Seat) Click here 3. IN ...
Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Road Sign Assist System: Terminals Of Ecu
TERMINALS OF ECU CHECK FORWARD RECOGNITION CAMERA NOTICE:
DTCs may be output when connectors are disconnected during inspection. Therefore, be sure to clear the DTCs using the Techstream once the inspection has been completed.
Do not apply excessive force to the forward recognition camera conn ...