| Last Modified: 01-30-2024 | 6.11:8.1.0 | Doc ID: RM100000001QOQZ |
| Model Year Start: 2021 | Model: RAV4 | Prod Date Range: [08/2020 - 10/2022] |
| Title: SEAT BELT: SEAT BELT WARNING SYSTEM: Rear Seat Belt Warning Light Malfunction; 2021 - 2022 MY RAV4 RAV4 HV [08/2020 - 10/2022] | ||
|
Rear Seat Belt Warning Light Malfunction |
DESCRIPTION
The main body ECU (multiplex network body ECU) detects whether either the rear doors are open or closed based on the courtesy light switch condition and then sends the rear door status signal to the combination meter assembly. The combination meter assembly detects the rear seat belt state. The rear seat belt warning light on the combination meter assembly illuminates, blinks or turns off in accordance with the rear door state, vehicle speed and rear seat belt state.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
The seat belt warning system uses the CAN communication system. First, confirm that there is no malfunction in the CAN communication system. Refer to the How to Proceed with Troubleshooting procedure.
Click here
![2021 - 2024 MY RAV4 RAV4 HV [08/2020 - ]; SEAT BELT: SEAT BELT WARNING SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING](/t3Portal/stylegraphics/info.gif)
- When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Main Body > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
RR Door Courtesy SW |
Rear door courtesy light switch RH signal |
OFF or ON |
OFF: Rear door RH closed ON: Rear door RH open |
- |
|
RL Door Courtesy SW |
Rear door courtesy light switch LH signal |
OFF or ON |
OFF: Rear door LH closed ON: Rear door LH open |
- |
Body Electrical > Main Body > Data List
|
Tester Display |
|---|
|
RR Door Courtesy SW |
|
RL Door Courtesy SW |
OK:
The Techstream display changes correctly in response to the rear door condition.
| NG |
|
|
|
2. |
READ VALUE USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Combination Meter / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Combination Meter > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Rear Right Seat Buckle / Occupant Detection Warning Switch |
Rear seat inner belt buckle signal |
ON or OFF |
OFF: Rear RH seat belt fastened ON: Rear RH seat belt not fastened |
- |
|
Rear Left Seat Buckle / Occupant Detection Warning Switch |
Rear seat inner with center belt LH (for LH) buckle signal |
ON or OFF |
OFF: Rear LH seat belt (for LH) fastened ON: Rear LH seat belt (for LH) not fastened |
- |
|
Rear Center Seat Buckle / Occupant Detection Warning Switch |
Rear seat inner with center belt LH (for Center) buckle signal |
ON or OFF |
OFF: Rear LH seat belt (for Center) fastened ON: Rear LH seat belt (for Center) not fastened |
- |
Body Electrical > Combination Meter > Data List
|
Tester Display |
|---|
|
Rear Right Seat Buckle / Occupant Detection Warning Switch |
|
Rear Left Seat Buckle / Occupant Detection Warning Switch |
|
Rear Center Seat Buckle / Occupant Detection Warning Switch |
|
Result |
Proceed to |
|---|---|
|
All item is normal |
A |
|
"Rear Right Seat Buckle / Occupant Detection Warning Switch" item does not switch to "ON" or "OFF" according to the rear seat belt condition |
B |
|
"Rear Left Seat Buckle / Occupant Detection Warning Switch" item does not switch to "ON" or "OFF" according to the rear LH seat belt condition |
C |
|
"Rear Center Seat Buckle / Occupant Detection Warning Switch" item does not switch to "ON" or "OFF" according to the rear center seat belt condition |
D |
| A |
|
| C |
|
| D |
|
|
|
3. |
INSPECT REAR SEAT INNER BELT ASSEMBLY |
(a) Remove the rear seat inner belt assembly.
Click here
(b) Inspect the rear seat inner belt assembly.
Click here
| NG |
|
|
|
4. |
CHECK HARNESS AND CONNECTOR (REAR SEAT INNER BELT ASSEMBLY - COMBINATION METER ASSEMBLY AND BODY GROUND) |
(a) Disconnect the N37 rear seat inner belt assembly connector.
(b) Disconnect the G19 combination meter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
N37-5 (RBR+) - G19-35 (RRSB) |
Always |
Below 1 Ω |
|
N37-5 (RBR+) or G19-35 (RRSB) - Body ground |
Always |
10 kΩ or higher |
|
N37-4 (RBR-) - Body ground |
Always |
Below 1 Ω |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
5. |
INSPECT REAR SEAT INNER WITH CENTER BELT ASSEMBLY LH |
(a) Remove the rear seat inner with center belt assembly LH.
Click here
(b) Inspect the rear seat inner with center belt assembly LH.
Click here
| NG |
|
|
|
6. |
CHECK HARNESS AND CONNECTOR (REAR SEAT INNER WITH CENTER BELT ASSEMBLY LH - COMBINATION METER ASSEMBLY AND BODY GROUND) |
(a) Disconnect the N38 rear seat inner with center belt assembly LH connector.
(b) Disconnect the G19 combination meter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
N38-5 (LBR+) - G19-36 (RLSB) |
Always |
Below 1 Ω |
|
N38-5 (LBR+) or G19-36 (RLSB) - Body ground |
Always |
10 kΩ or higher |
|
N38-4 (LBR-) - Body ground |
Always |
Below 1 Ω |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
7. |
INSPECT REAR SEAT INNER WITH CENTER BELT ASSEMBLY LH |
(a) Remove the rear seat inner with center belt assembly LH.
Click here
(b) Inspect the rear seat inner with center belt assembly LH.
Click here
| NG |
|
|
|
8. |
CHECK HARNESS AND CONNECTOR (REAR SEAT INNER WITH CENTER BELT ASSEMBLY LH - COMBINATION METER ASSEMBLY AND BODY GROUND) |
(a) Disconnect the N39 rear seat inner with center belt assembly LH connector.
(b) Disconnect the G19 combination meter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
N39-4 (CBR+) - G19-19 (RCSB) |
Always |
Below 1 Ω |
|
N39-4 (CBR+) or G19-19 (RCSB) - Body ground |
Always |
10 kΩ or higher |
|
N39-3 (CBR-) - Body ground |
Always |
Below 1 Ω |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|