Sensor (Motor) Failure (B2341,B2344)
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 output.
When the sliding roof ECU (sliding roof drive gear sub-assembly) detects a gear malfunction and the sliding roof operation is stopped, DTC B2344 is output.
DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
B2341 |
Sensor (motor) failure (When the ECU enters fail-safe mode due to a problem with the motor) |
|
B2344 |
Position failure (When the ECU enters fail-safe mode due to a problem with the gear position) |
|
CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following inspection procedure.
- When the sliding roof ECU (sliding roof drive gear sub-assembly) is replaced or removed and reinstalled, it requires initialization (See page
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).
CHECK SLIDING ROOF OPERATION
(a) Check the sliding roof auto operation (See page ).
OK:
Auto operation operates normally.
| NG | .gif) | GO TO STEP 3 |
|
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CHECK DTC OUTPUT
(a) Clear the DTC (See page ).
(b) Recheck for DTCs.
OK:
DTC B2341 or B2344 is not output.
| OK | | USE SIMULATION METHOD TO CHECK |
| NG | | REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) |
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 (See page ).
OK:
Sliding roof ECU (sliding roof drive gear sub-assembly) can be initialized.
| NG | | GO TO STEP 5 |
|
CHECK DTC OUTPUT
(a) Clear the DTC (See page ).
(b) Recheck for DTCs.
OK:
DTC B2341 or B2344 is not output.
| OK | | END |
| NG | | REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) |
CHECK HARNESS AND CONNECTOR (SLIDING ROOF ECU - SLIDING ROOF SWITCH)
(a) Disconnect the P6 switch connector. |
 |
(b) Disconnect the P4 ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
|---|---|---|
P4-9 (CLS) - P6-2 (CLS) |
Always |
Below 1 Ω |
P4-9 (CLS) - Body ground |
Always |
10 kΩ or higher |
P4-7 (OPN) - P6-3 (OPN) |
Always |
Below 1 Ω |
P4-7 (OPN) - Body ground |
Always |
10 kΩ or higher |
P4-8 (DWN) - P6-4 (DOWN) |
Always |
Below 1 Ω |
P4-8 (DWN) - Body ground |
Always |
10 kΩ or higher |
P4-10 (UP) - P6-5 (UP) |
Always |
Below 1 Ω |
P4-10 (UP) - Body ground |
Always |
10 kΩ or higher |
P6-1 (GND) - Body ground |
Always |
Below 1 Ω |
P4-2 (E) - Body ground |
Always |
Below 1 Ω |
*1 |
Front view of wire harness connector (to Sliding Roof ECU (Sliding Roof Drive Gear Sub-assembly)) |
*2 |
Front view of wire harness connector (to Sliding Roof Switch (Roof Console Box Assembly)) |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
INSPECT SLIDING ROOF SWITCH (ROOF CONSOLE BOX ASSEMBLY)
(a) Remove the sliding roof switch (roof console box assembly) (See page |
.png) |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
|---|---|---|
P6-4 (DOWN) - P6-1 (GND) |
TILT DOWN switch is pressed |
Below 1 Ω |
P6-4 (DOWN) - P6-1 (GND) |
TILT DOWN switch is not pressed |
10 kΩ or higher |
P6-5 (UP) - P6-1 (GND) |
TILT UP switch is pressed |
Below 1 Ω |
P6-5 (UP) - P6-1 (GND) |
TILT UP switch is not pressed |
10 kΩ or higher |
P6-2 (CLS) - P6-1 (GND) |
SLIDE CLOSE switch is pressed |
Below 1 Ω |
P6-2 (CLS) - P6-1 (GND) |
SLIDE CLOSE switch is not pressed |
10 kΩ or higher |
P6-3 (OPN) - P6-1 (GND) |
SLIDE OPEN switch is pressed |
Below 1 Ω |
P6-3 (OPN) - P6-1 (GND) |
SLIDE OPEN switch is not pressed |
10 kΩ or higher |
*1 |
Component without harness connected (Sliding Roof Switch (Roof Console Box Assembly)) |
| OK | | REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) |
| NG | | REPLACE SLIDING ROOF SWITCH (ROOF CONSOLE BOX ASSEMBLY) |
Test yourself
A quick Toyota Venza quiz: every answer comes with an explanation and a link to the manual page.