| Last Modified: 05-08-2025 | 6.11:8.1.0 | Doc ID: RM100000001FJ1H |
| Model Year Start: 2019 | Model: RAV4 | Prod Date Range: [11/2018 - ] |
| Title: SLIDING ROOF / CONVERTIBLE: PANORAMIC MOON ROOF SYSTEM: B2346; Lost Communication with Front Shade Module; 2019 - 2025 MY RAV4 RAV4 HV [11/2018 - ] | ||
|
DTC |
B2346 |
Lost Communication with Front Shade Module |
DESCRIPTION
This DTC is stored when LIN communication between the sliding roof ECU (sliding roof drive gear assembly [sliding roof]) and roof sunshade ECU (sliding roof drive gear assembly [roof sunshade]) stops for 10 seconds or more.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
B2346 |
Lost Communication with Front Shade Module |
No communication between the sliding roof ECU (sliding roof drive gear assembly [sliding roof]) and roof sunshade ECU (sliding roof drive gear assembly [roof sunshade]) for 10 seconds or more. |
|
WIRING DIAGRAM
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 assembly [sliding roof]) is removed and reinstalled or replaced, the sliding roof ECU (sliding roof drive gear assembly [sliding roof]) must be initialized.
Click here
![2019 - 2025 MY RAV4 RAV4 HV [11/2018 - ]; SLIDING ROOF / CONVERTIBLE: PANORAMIC MOON ROOF SYSTEM: INITIALIZATION](/t3Portal/stylegraphics/info.gif)
-
When the roof sunshade ECU (sliding roof drive gear assembly [roof sunshade]) is removed and reinstalled or replaced, the roof sunshade ECU (sliding roof drive gear assembly [roof sunshade]) must be initialized.
Click here
PROCEDURE
|
1. |
CHECK FOR DTC |
(a) Clear the DTCs.
Click here
Body Electrical > Sliding Roof > Clear DTCs
(b) Check for DTCs.
Click here
Body Electrical > Sliding Roof > Trouble Codes
OK:
DTC B2346 is not output.
| NG |
|
|
|
2. |
CHECK HARNESS AND CONNECTOR (SLIDING ROOF ECU [SLIDING ROOF DRIVE GEAR ASSEMBLY (SLIDING ROOF)] - ROOF SUNSHADE ECU [SLIDING ROOF DRIVE GEAR ASSEMBLY (ROOF SUNSHADE)]) |
(a) Disconnect the P4 sliding roof ECU (sliding roof drive gear assembly [sliding roof]) connector.
(b) Disconnect the P16 roof sunshade ECU (sliding roof drive gear assembly [roof sunshade]) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
P4-3 (MPX2) - P16-3 (LLIN) |
Always |
Below 1 Ω |
|
P4-3 (MPX2) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
CHECK HARNESS AND CONNECTOR (ROOF SUNSHADE ECU [SLIDING ROOF DRIVE GEAR ASSEMBLY (ROOF SUNSHADE)] - BATTERY AND BODY GROUND) |
|
(a) Disconnect the roof sunshade ECU (sliding roof drive gear assembly [roof sunshade]) connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A-2 (E) - Body ground |
Always |
Below 1 Ω |
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
A-1 (+B) - Body ground |
Ignition switch off |
11 to 14 V |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
CHECK ROOF SUNSHADE ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY [ROOF SUNSHADE]) |
(a) Temporarily replace the roof sunshade ECU (sliding roof drive gear assembly [roof sunshade]) with a new or normally functioning one.
Click here
|
|
5. |
CHECK FOR DTC |
(a) Clear the DTCs.
Click here
Body Electrical > Sliding Roof > Clear DTCs
(b) Check for DTCs.
Click here
Body Electrical > Sliding Roof > Trouble Codes
OK:
DTC B2346 is not output.
| OK |
|
END (ROOF SUNSHADE ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY [ROOF SUNSHADE]) IS DEFECTIVE) |
| NG |
|
REPLACE SLIDING ROOF ECU [SLIDING ROOF DRIVE GEAR ASSEMBLY (SLIDING ROOF)] |
|
|