| Last Modified: 01-30-2024 | 6.11:8.1.0 | Doc ID: RM100000001FQP5 |
| Model Year Start: 2019 | Model: RAV4 | Prod Date Range: [11/2018 - 10/2023] |
| Title: DOOR / HATCH: POWER BACK DOOR SYSTEM (for Gasoline Model): B2251; Back Door Closer Switch Malfunction; 2019 - 2023 MY RAV4 [11/2018 - 10/2023] | ||
|
DTC |
B2251 |
Back Door Closer Switch Malfunction |
DESCRIPTION
The multiplex network door ECU receives signals from the latch switch, initial switch, pawl switch and back door courtesy switch, which are built into the back door lock with courtesy light switch assembly. Based on these switch signals, the latch position of the back door lock with courtesy light switch assembly is determined.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
B2251 |
Back Door Closer Switch Malfunction |
While the back door closer is operating, a malfunction is detected in position information from the back door courtesy switch within a specified amount of time. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
If the replacement, removal and installation of the multiplex network door ECU or disconnection of the connectors of the multiplex network door ECU has been performed, initialize the power back door system.
Click here
![2019 - 2023 MY RAV4 [11/2018 - 10/2023]; DOOR / HATCH: POWER BACK DOOR SYSTEM (for Gasoline Model): INITIALIZATION](/t3Portal/stylegraphics/info.gif)
- If the main body ECU (multiplex network body ECU) is replaced, refer to Registration.
-
As the door control battery is installed between the vehicle battery and main body ECU (multiplex network body ECU), first perform the inspections in On-Vehicle Inspection to confirm that there are no malfunctions in the power source circuit for the main body ECU (multiplex network body ECU) before performing this troubleshooting procedure.*
- *: w/ Door Control Battery
PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM |
(a) Read the Data List according to the display on the Techstream.
Click here
Body Electrical > Back Door > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Courtesy SW |
Back door courtesy switch signal |
ON or OFF |
ON: Back door open OFF: Back door closed |
- |
Body Electrical > Back Door > Data List
|
Tester Display |
|---|
|
Courtesy SW |
OK:
The display is as specified in the normal condition column.
| OK |
|
|
|
2. |
INSPECT BACK DOOR LOCK WITH COURTESY LIGHT SWITCH ASSEMBLY |
(a) Remove the back door lock with courtesy light switch assembly.
Click here
(b) Inspect the back door lock with courtesy light switch assembly.
Click here
| NG |
|
|
|
3. |
CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK WITH COURTESY LIGHT SWITCH ASSEMBLY - MULTIPLEX NETWORK DOOR ECU AND BODY GROUND) |
(a) Disconnect the 4H instrument panel junction block assembly connector.
(b) Disconnect the R14 back door lock with courtesy light switch assembly connector.
(c) Disconnect the R18 multiplex network door ECU connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
R14-4 (CTY) - R18-11 (FUL) |
Always |
Below 1 Ω |
|
R14-1 (E) - Body ground |
Always |
Below 1 Ω |
|
R14-4 (CTY) or R18-11 (FUL) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - MULTIPLEX NETWORK DOOR ECU) |
(a) Disconnect the 4H instrument panel junction block assembly connector.
(b) Disconnect the R18 multiplex network door ECU connector.
(c) Disconnect the R14 back door lock with courtesy light switch assembly connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
4H-34 or R18-11 (FUL) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
5. |
INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY |
(a) Remove the instrument panel junction block assembly.
Click here
(b) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
Click here
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A-4 (BCTY) - 4H-34 |
Always |
Below 1 Ω |
| NG |
|
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
|
|
|
6. |
READ VALUE USING TECHSTREAM |
(a) Disconnect the R18 multiplex network door ECU connector.
(b) Read the Data List according to the display on the Techstream.
Click here
Body Electrical > Main Body > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Back Door Courtesy SW |
Back door courtesy switch signal |
ON or OFF |
ON: Back door open OFF: Back door closed |
- |
Body Electrical > Main Body > Data List
|
Tester Display |
|---|
|
Back Door Courtesy SW |
OK:
The display is as specified in the normal condition column.
| OK |
|
| NG |
|
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
|
|